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Question 1
Correct
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During the excision of the submandibular salivary gland, which one of the following nerves is at risk of injury as the duct is mobilised?
Your Answer: Lingual nerve
Explanation:The lingual nerve wraps around Wharton’s duct, and thus, is at risk of injury as the submandibular gland is mobilised. The lingual nerve provides sensory supply to the anterior 2/3 of the tongue.Note:- Submandibular duct (Wharton’s duct): It opens lateral to the lingual frenulum on the anterior floor of the mouth. It is around 5 cm in length.- Lingual nerve wraps around Wharton’s duct. As the duct passes forwards, it crosses medial to the nerve, above it and then crosses back, lateral to it, to reach a position below the nerve.
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This question is part of the following fields:
- ENT
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Question 2
Incorrect
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A 15-year-old boy presents with hypertension and acute renal failure after an episode of diarrhoea. What is the most likely diagnosis?
Your Answer: Salmonellosis
Correct Answer: Haemolytic–uraemic syndrome
Explanation:The likely diagnosis in this case is Haemolytic Uremic Syndrome (HUS), which is generally seen in young children presenting with a triad of symptoms, namely: acute renal failure, microangiopathic haemolytic anaemia, and thrombocytopenia. The typical cause of HUS is ingestion of a strain of Escherichia coli causing diarrhoea in these cases as well.
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This question is part of the following fields:
- Renal
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Question 3
Incorrect
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A 2 year old female was taken to her local emergency department with jerking movements in her limbs. This lasted for around 10 seconds, and then she fell unconscious. She soon regained consciousness - she was disorientated but afebrile with no symptoms of meningeal irritation. From the list of options, chose the most appropriate investigation route for this patient.
Your Answer: CT scan
Correct Answer: 24 hour EEG
Explanation:Many of the symptoms favour an epilepsy diagnosis: uncontrollable jerking of the limbs and a loss of consciousness. A 24-hour EEG is used to diagnose epilepsy.
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This question is part of the following fields:
- Neurology
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Question 4
Incorrect
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A 16-year-old boy is scheduled for a repair of an inguinal hernia. Which of the following structures must be divided to gain access to the inguinal canal?
Your Answer: Conjoint tendon
Correct Answer: External oblique aponeurosis
Explanation:External oblique forms the outermost muscle of the three muscles comprising the anterolateral aspect of the abdominal wall. Its aponeurosis comprises the anterior wall of the inguinal canal.
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This question is part of the following fields:
- Dermatology
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Question 5
Correct
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A case-control study is being designed to look at the relationship between eczema and a new vaccine for yellow fever. What is the usual outcome measure in a case-control study?
Your Answer: Odds ratio
Explanation:A case–control study (also known as case–referent study) is a type of observational study in which two existing groups differing in outcome are identified and compared on the basis of some supposed causal attribute. Case–control studies are often used to identify factors that may contribute to a medical condition by comparing subjects who have that condition/disease (the cases) with patients who do not have the condition/disease but are otherwise similar (the controls).
An odds ratio (OR) is a statistic that quantifies the strength of the association between two events, A and B. The odds ratio is defined as the ratio of the odds of A in the presence of B and the odds of A in the absence of B or vice versa. -
This question is part of the following fields:
- Epidemiology And Statistics
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Question 6
Correct
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A 14 year old known asthmatic presents to the A&E department with difficulty breathing. She was seen by her regular doctor the day before with a sore throat which he diagnosed as tonsillitis and was prescribed oral Amoxicillin for 5 days. Past medical history:Ulcerative colitis diagnosed four years ago.Current medications:Inhaled salbutamol and beclomethasoneMesalazine 400 mg TDSShe was observed to be alert and oriented but she had laboured breathing. Inspiratory wheeze was noted. She was pale, sweaty and cyanosed. Her temperature was 36.7ºC, pulse 121/minute and blood pressure 91/40 mmHg. The lungs were clear and the remainder of the examination was normal. She was given high-flow oxygen through a face mask but despite this her breathing became increasingly difficult. What is the most likely causative agent?
Your Answer: Haemophilus influenzae
Explanation:Acute epiglottitis is a life-threatening disorder with serious implications to the anaesthesiologist because of the potential for laryngospasm and irrevocable loss of the airway. There is inflammatory oedema of the arytenoids, aryepiglottic folds and the epiglottis| therefore, supraglottitis may be used instead or preferred to the term acute epiglottitis.Acute epiglottitis can occur at any age. The responsible organism used to be Hemophilus influenzae type B (Hib), but infection with group A b-haemolytic Streptococci has become more frequent after the widespread use of Hemophilus influenzae vaccination. The typical presentation in epiglottitis includes acute occurrence of high fever, severe sore throat and difficulty in swallowing with the sitting up and leaning forward position in order to enhance airflow. There is usually drooling because of difficulty and pain on swallowing. Acute epiglottitis usually leads to generalized toxaemia. The most common differential diagnosis is croup and a foreign body in the airway. A late referral to an acute care setting with its serious consequences may result from difficulty in differentiation between acute epiglottitis and less urgent causes of a sore throat, shortness of breath and dysphagia.
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This question is part of the following fields:
- Respiratory
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Question 7
Correct
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A 6 year-old boy is brought to you coughing. He is suspected to have aspirated a Lego piece which he was seen playing with. Where would you expect the piece to be?
Your Answer: Right main bronchus
Explanation:Inhaled objects are more likely to enter the right lung for several reasons. First the right bronchus is shorter, wider and more vertical than the left bronchus. Also, the carina (a ridge-like structure at the point of tracheal bifurcation) is set a little towards the left. The terminal bronchiole is a very small space and impossible for the seed to lodge here.
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This question is part of the following fields:
- Respiratory
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Question 8
Correct
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A 3 year old girl presents with a 2 day history of GI symptoms whenever she eats cauliflower. Her mother is concerned that she may be allergic, and has kept a food diary and a record of her symptoms. Which of these is LEAST likely to be associated with food allergies?
Your Answer: Polycythaemia
Explanation:Polycythaemia is a condition in which there is an increased red cell mass and increasing blood viscosity, which decreases its ability to flow. It is not associated with food allergies, but is fundamentally caused by either an overproduction of red blood cells, or a reduction in the volume of plasma. Abdominal pain, constipation, loose and frequent stools, and pallor are all non IGE mediated symptoms of food allergy according to NICE guidelines in the UK.
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This question is part of the following fields:
- Gastroenterology And Hepatology
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Question 9
Correct
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Which of the following statements is MOST appropriate regarding the features of Graves disease?
Your Answer: Association with HLA-DR3
Explanation:Graves disease is an autoimmune disorder in which patients present with thyrotoxicosis and related ophthalmopathy, and dermopathy. Many affected patients experience hyperthyroidism. Peak incidence of graves disease is after the 3rd decade of life and is more common in women than in men. Graves susceptibility is association with HLA-DR3. Clinical features of Graves disease include an increased metabolic rate, heat intolerance, irritability, weight loss despite increasing appetite, diarrhoea palpitations, chemosis, acropachy and onycholysis.
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This question is part of the following fields:
- Endocrinology
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Question 10
Incorrect
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Scarring type of alopecia occurs in which of the following conditions?
Your Answer: Alopecia areata
Correct Answer: Discoid lupus
Explanation:Alopecia is a scalp condition characterized by either overall baldness or patches of hair loss over the head. It can be broadly classified as scarring alopecia and non-scarring alopecia. Non-scarring is the most common type and is seen in various conditions like nutritional deficiencies, alopecia areata, hypothyroidism, tinea capitis, and SLE. Scarring alopecia is commonly seen in cases of discoid lupus erythematosus, which is a common cause of widespread inflammatory and scarring lesions all over the body and scalp.
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This question is part of the following fields:
- Dermatology
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Question 11
Incorrect
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A 15 year old girl presented to the emergency with a history of chronic cough, fever and weight loss. Her chest X-ray showed multiple nodules 1-4 cm in size and some of them with cavitation especially in the upper lobe. A sputum sample was positive for acid fast bacilli. Which of the following cells played a part in the development of the lung lesions?
Your Answer: Platelet
Correct Answer: Macrophage
Explanation:The characteristic cells in granulomatous inflammation are giant cells, formed from merging macrophages and epithelioid cells elongated with granular eosinophilic cytoplasm. Granulomatous reactions are seen in patients with tuberculosis. A tuberculous/caseating granuloma is characterised by a zone of central necrosis lined with giant multinucleated giant cells (Langhans cells) and surrounded by epithelioid cells, lymphocytes and fibroblasts. The caseous zone is present due to the damaged and dead giant cells and epithelioid cells.
Mast cells are only few in number and fibroblasts lay down collagen.
Basophils are not present.
The giant cell made up of macrophages are the most abundant cells in this inflammatory process. -
This question is part of the following fields:
- Respiratory
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Question 12
Correct
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A 12-year-old boy presented with jaundice and fatigue for the last two weeks. He complains of intermittent pain in his epigastrium. He is otherwise healthy with no history of vomiting, diarrhoea, loss of appetite or weight. History revealed that he has had fatigue all his life leading to him missing out on sports at regular intervals at school. His mother reports that he had two episodes of hepatitis at ages 5 and 7 years. There is no family history of jaundice. He has no significant travel history.On physical examination, yellow sclera were observed. Additionally, on abdominal examination, the splenic tip was palpable at 3 cm with some tenderness of the right upper quadrant. He was found to have mild tachycardia with normal blood pressure and no fever.Blood results:- Hb: 12.6 g/dl- MCV: 104 fL- MCHC: 38 g/dL- WBC Count: 10 x 109/L- Reticulocyte count: 148 x 109/L (Normal Range 20-100 x 109/L)- Bilirubin: 34 μmol/L- LDH: 600 lμ/L (Normal Range 230-450 lμ/l)- Direct Coomb's test: NegativeAbdominal ultrasonography revealed an enlarged spleen measuring 15 cmWhat is the most probable diagnosis?
Your Answer: Hereditary spherocytosis
Explanation:The most probable diagnosis based on the scenario provided above is hereditary spherocytosis.While jaundice and abdominal pain might make you think of hepatitis or cholecystitis in the first instance, the lack of fever suggests otherwise. The apyrexial presentation is against acute cholecystitis, and the past medical history reveals a chronic type of fatigue and two previous episodes of hepatitis. Furthermore, it is unlikely that the child has contracted infective hepatitis twice and now a third time! The most common cause of hepatitis in childhood is hepatitis A, however the lack of travel history to endemic areas makes this less likely. Hepatitis A is usually a mild, self-limiting disease that never presents with chronic symptoms. The chronicity of his fatigue and the blood results lead towards a haematological diagnosis. This is further substantiated by his low haemoglobin levels, high MCV and high reticulocyte count. Chronic haemolytic anaemia is the most likely cause, and the negative Coombs excludes autoimmune haemolytic anaemia (AIHA). Thus, leaving us with the answer as hereditary spherocytosis.Hereditary spherocytosis is a disorder that makes the cytoskeleton of red cells more fragile and therefore leads to red cell death and splenomegaly. Gallstones are a result of this red cell destruction and increased haem metabolism.
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This question is part of the following fields:
- Haematology And Oncology
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Question 13
Incorrect
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An infant presents with a rash to her body consisting of greasy yellow crusted lesions. Her mother complains that the child has been experiencing chronic diarrhoea and recurrent skin infections. She is non-febrile, but her growth chart is highly suggestive of failure to thrive.The constellation of symptoms present in this child suggests which of the following conditions?
Your Answer: Cow's milk protein intolerance
Correct Answer: Leiner's disease
Explanation:Based on the patient’s presentation, he’s probably suffering from Leiner’s diseaseLeiner’s disease is a severe generalised form of seborrhoeic dermatitis. It is also associated with recurrent diarrhoea, recurrent skin and internal infections, and failure to thrive.Seborrhoeic dermatitis is a common and self-limiting condition in childhood. Lesions affect the scalp (cradle cap), and sometimes the ear, nose, and eyebrows. It is characterised by greasy yellow or yellow-brown scales.There is an association with Malassezia, and the lesions are a reaction to this yeast, rather than caused by it.It is most common in the 6-12 month age group. Simple brushing with a soft bristle brush, use of oil or emollient, and ketoconazole 2% shampoo are all treatment options.
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This question is part of the following fields:
- Dermatology
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Question 14
Incorrect
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A young boy presents with signs of kidney disease. He has a long-standing history of proteinuria and hypocomplementemia which were not responsive to steroid treatment. What is the most probable diagnosis?
Your Answer: Minimal change nephrotic syndrome
Correct Answer: Membranoproliferative glomerulonephritis
Explanation:Membranoproliferative glomerulonephritis primarily affects children and young adults, with patients presenting with nephrotic or nephritic syndrome or with asymptomatic renal disease. There are 3 types defined by pathologic features. All three types are associated with hypocomplementemia, but they manifest somewhat different mechanisms of complement activation. This type of glomerulonephritis often progresses slowly to end-stage renal disease, and it tends to recur after renal transplantation, especially type II.
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This question is part of the following fields:
- Nephro-urology
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Question 15
Correct
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An 8-year-old boy who recently migrated from Nigeria was seen in A&E department with a six-week history of progressive swelling of his jaw, fever, night sweats, and weight loss. His mother reported an episode of sore throat in the past which was treated with antibiotics, but he developed a rash subsequently. Other than that, there was no other significant past medical history. On examination, a painless, nontender 4x3cm mass was found that was fixed and hard. The only other examination finding of note was rubbery symmetrical cervical lymphadenopathy.Which of the following translocation would most likely be found on biopsy karyotyping?
Your Answer: t(8|14)
Explanation:Burkitt lymphoma is associated with the c-myc gene translocation, usually t(8|14). Burkitt lymphoma is a rare high-grade non-Hodgkin lymphoma endemic to west Africa and the mosquito belt. It has a close association with the contraction of Epstein-Barr virus (EBV). Burkitt lymphoma often presents with symmetrical painless lymphadenopathy, systemic B symptoms (fever, sweats, and weight loss), central nervous system involvement, and bone marrow infiltration. Classically in the textbooks, the patient also develops a large jaw tumour.Other aforementioned options are ruled out because:1. t(9|22)—Chronic myeloid leukaemia2. t(15|17)—Acute promyelocytic leukaemia3. t(14|18)—Follicular Lymphoma4. t(11|14)—Mantle Cell Lymphoma
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This question is part of the following fields:
- Haematology And Oncology
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Question 16
Incorrect
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During uterogrowth, the second pharyngeal arch gives rise to which structures?
Your Answer: Malleus
Correct Answer: Stylohyoid muscle
Explanation:The second pharyngeal arch or hyoid arch, is the second of six pharyngeal arches that develops in fetal life during the fourth week of development and assists in forming the side and front of the neck. Derivatives:
Skeletal – From the cartilage of the second arch arises:
Stapes,
Temporal styloid process,
Stylohyoid ligament, and
Lesser cornu of the hyoid bone.
Muscles:
Muscles of face
Occipitofrontalis muscle
Platysma
Stylohyoid muscle
Posterior belly of Digastric
Stapedius muscle
Auricular muscles
Nerve supply: Facial nerve -
This question is part of the following fields:
- Embryology
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Question 17
Incorrect
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A 16-year-old has a right sided aortic arch which is visible on the echocardiography. Which of the following condition most likely predisposes to this finding?
Your Answer: Noonan’s syndrome
Correct Answer: Tetralogy of Fallot
Explanation:Several types of right-sided aortic arch exist, the most common ones being right-sided aortic arch with aberrant left subclavian artery and the mirror-image type. The variant with aberrant left subclavian artery is associated with congenital heart disease in only a small minority of affected people. The mirror-image type of right aortic arch is very strongly associated with congenital heart disease, in most cases tetralogy of Fallot. A right-sided aortic arch does not cause symptoms on itself, and the overwhelming majority of people with the right-sided arch have no other symptoms. However when it is accompanied by other vascular abnormalities, it may form a vascular ring, causing symptoms due to compression of the trachea and/or oesophagus.
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This question is part of the following fields:
- Cardiovascular
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Question 18
Incorrect
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A 15-year-old boy with type 1 DM is recently started on an insulin pump. There has been better glycaemic control and he now subsequently enjoys a healthy, active lifestyle. During the consultation, he seems to acknowledge the risks of missing out his dose and says that he is comfortable with his new pump. he mentions that he changes his site after every 4 days. However, a random blood sugar analysis reveals it to be 22.3 mmol/L. Which of the following is the most likely reason for the raised RBS level?
Your Answer: Missed bolus
Correct Answer: Site change is overdue
Explanation:Insertion sites and sensor sites should be rotated each time the infusion set or glucose sensor is changed. This keeps the tissue healthy and allows previous sites to completely heal before reusing them. Change infusion set every 2 to 3 days to help prevent infection.
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This question is part of the following fields:
- Endocrinology
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Question 19
Incorrect
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A premature neonate at 28 weeks gestation suffers from right sided intraventricular haemorrhage with no ventricular dilation while on the ventilator. What advice should ideally be given to the parents in this situation?
Your Answer: There are likely to be no significant long-term effects
Correct Answer: It is probable that there will be no significant long-term effects but his development will be closely followed just in case
Explanation:There are four types of IVH. These are called grades and are based on the degree of bleeding.Grades 1 and 2 involve a smaller amount of bleeding. Most of the time, there are no long-term problems as a result of the bleeding. Grade 1 is also referred to as germinal matrix haemorrhage (GMH).Grades 3 and 4 involve more severe bleeding. The blood presses on (grade 3) or directly involves (grade 4) brain tissue. Grade 4 is also called an intraparenchymal haemorrhage. Blood clots can form and block the flow of cerebrospinal fluid. This can lead to increased fluid in the brain (hydrocephalus).
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This question is part of the following fields:
- Neonatology
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Question 20
Incorrect
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A 7-year-old boy is diagnosed with metabolic acidosis as a result of severe dehydration. Which of the following conditions is most likely to cause severe dehydration and metabolic acidosis?
Your Answer: Severe persistent vomiting
Correct Answer: Severe diarrhoea
Explanation:Diarrhoea is defined as having three or more loose or liquid stools per day, or as having more stools than is normal for that person. Severe diarrhoea, causing fluid loss and loss of bicarbonate, will result in marked dehydration and metabolic acidosis.
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This question is part of the following fields:
- Fluid And Electrolytes
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Question 21
Incorrect
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A 16-year-old woman presents with a 7 month history of secondary amenorrhoea and three months history of galactorrhoea. She has been otherwise well. She had menarche at the age of 12 and has otherwise had regular periods. She has been sexually active for approximately one year and has occasionally used condoms for contraception. She smokes five cigarettes daily and occasionally smokes cannabis.On examination, she appears well, and clinically euthyroid, has a pulse of 70 bpm and blood pressure of 112/70 mmHg.Investigations show:Serum oestradiol 130 nmol/L (130-600)Serum LH 4.5 mU/L (2-20)Serum FSH 2.2 mU/L (2-20)Serum prolactin 6340 mU/L (50-450)Free T4 7.2 pmol/L (10-22)TSH 2.2 mU/L (0.4-5.0)What is the most likely diagnosis?
Your Answer: Pregnancy
Correct Answer: Prolactinoma
Explanation:The patient has hyperprolactinaemia with otherwise normal oestradiol, FSH and LH. This is highly suggestive of Prolactinoma rather than a non functioning tumour.In polycystic ovaries, there is increase in the level of LH while FSH is normal or low.
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This question is part of the following fields:
- Endocrinology
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Question 22
Correct
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Which of the following classification systems is used for categorizing scaphoid fractures?
Your Answer: Herbert classification
Explanation:Scaphoid fractures are regarded as fractures that are difficult to heal, so a classification system is needed taking different factors into account that should lead towards proper guidance to the healing time and management of these fractures. Popular classification criteria are Herbert, Russe, and Mayo classification systems. Herbert’s classification system is based on the fracture’s stability and proposes that all complete bicortical fractures (except for tubercle fractures) are unstable. Salter-Harris classification is used for categorizing epiphyseal fractures, while Delbert classification system is reserved for fractures of the proximal femur in children. Fractures of the ankles are classified using Ottawa rules, and Garland classification is used for supracondylar fractures in children.
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This question is part of the following fields:
- Emergency Medicine
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Question 23
Incorrect
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A 15-year-old girl is referred to the paediatric unit with reduced urine output and lethargy. She has been passing bloody diarrhoea for the past four days. On admission she appears dehydrated. Bloods show the following:Na+ 142 mmol/lK+ 4.8 mmol/lBicarbonate 22 mmol/lUrea 10.1 mmol/lCreatinine 176 µmol/lHb 10.4 g/dlMCV 90 flPlt 91 * 109/lWBC 14.4 * 109/lGiven the likely diagnosis, which one of the following organisms is the most likely cause?
Your Answer: Giardiasis
Correct Answer: E. coli
Explanation:The likely diagnosis in this case is Haemolytic Uremic Syndrome (HUS), which is generally seen in young children presenting with a triad of symptoms, namely: acute renal failure, microangiopathic haemolytic anaemia, and thrombocytopenia. The typical cause of HUS is ingestion of a strain of Escherichia coli.
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This question is part of the following fields:
- Renal
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Question 24
Correct
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A 15-month-old child is due for his measles, mumps and rubella (MMR) vaccines. He is feverish due to an acute otitis media and the mother gives a family history of egg allergy. What is the most appropriate action?
Your Answer: Defer immunization for two weeks
Explanation:Vaccines should not be given to a feverish child.
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This question is part of the following fields:
- Immunology
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Question 25
Incorrect
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An asymptomatic 5-month old boy was referred to the paediatric cardiology department after his GP noted an ejection systolic murmur and thrill at the upper left sternal edge. SpO2 saturation is at 98%, and an ECG reveals an R/S ratio >1 in the V1 lead.What is the most probable diagnosis for this child?
Your Answer: Patent ductus arteriosus
Correct Answer: Pulmonary Stenosis
Explanation:The most probable diagnosis in this patient would be pulmonary stenosis. Pulmonary Stenosis:Pulmonary valve murmurs are heard in the upper left sternal edge, associated with a thrill but no desaturation in the absence of an additional shunt. The ECG changes suggest right ventricular hypertrophy. Pulmonary stenosis is often well tolerated in childhood unless severe. These should be monitored with serial echocardiography, and balloon pulmonary valvoplasty should be considered once the pressure gradient reaches 64 mmHg.Other options:- Atrial septal defect: While atrial septal defects are associated with right ventricular outflow tract murmurs, they would not cause a thrill.- Patent ductus arteriosus: PDA murmurs can be audible in the left upper sternal edge, but would normally be audible in the left infraclavicular area and be continuous rather than ejection systolic. This left to right shunt would not cause desaturation but does cause left-sided volume loading and hence left-sided ECG changes.- Tetralogy of Fallot: Ventricular septal defect, overriding aorta, subpulmonary stenosis, and right ventricular hypertrophy. This would often cause a ULSE murmur with a thrill and RVH on ECG. However, this degree of obstruction would cause shunting from right to left, and this child would be desaturated.- Ventricular septal defect: Isolated ventricular septal defects cause pansystolic murmurs at the left lower sternal edge. They would have left-sided ECG changes and normal saturations (in the absence of pulmonary hypertension).
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This question is part of the following fields:
- Cardiovascular
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Question 26
Incorrect
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What proportion of salivary secretions is contributed by the submandibular glands?
Your Answer: 20%
Correct Answer: 0.7
Explanation:The submandibular glands provide the bulk of salivary secretions contributing close to 70%. The sublingual glands provide 5% and the remainder from the parotid.
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This question is part of the following fields:
- ENT
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Question 27
Incorrect
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What is the mode of spread of chickenpox?
Your Answer: Blood
Correct Answer: Airborne
Explanation:Chickenpox is a highly communicable viral disease caused by human (alpha) herpesvirus 3 (varicella-zoster virus, VZV). It is transmitted from person to person by direct contact (touching the rash), droplet or air born spread (coughing and sneezing).
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This question is part of the following fields:
- Infectious Diseases
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Question 28
Incorrect
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A 17-year-old boy is brought to the endocrinologist by his parents who are worried that he might have delayed growth as all his friends are taller than him. On examination, he has a preadolescent body habitus and no evidence of development of secondary sexual characteristics. Serum LH, FSH, and testosterone all match prepubertal range. Following an injection of GnRH, the LH and FSH concentrations increase only slightly. However, when the GnRH is given daily for 7 days, a normal response is elicited. Which of the following is the most likely causing this boy's delayed puberty?
Your Answer: Seminiferous tubular dysfunction
Correct Answer: A hypothalamic disorder
Explanation:Hypogonadotropic hypogonadismIn Kallmann syndrome: impaired migration of GnRH cells and defective olfactory bulb → ↓ GnRH in hypothalamus → ↓ FSH and ↓ LH → ↓ testosterone and ↓ oestrogenIn hypothalamic and/or pituitary lesions: ↓ pituitary gonadotropins (↓ FSH and ↓ LH) → ↓ testosterone and ↓ oestrogen
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This question is part of the following fields:
- Endocrinology
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Question 29
Incorrect
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A 15-year-old boy, who has a family history of Gilbert's syndrome, presents with signs and symptoms of hepatic dysfunction. Liver function tests reveal raised unconjugated bilirubin levels. Subsequent genetic testing led to a diagnosis of Gilbert's syndrome. What is the reason for the unconjugated hyperbilirubinemia in Gilbert's syndrome?
Your Answer: Reduced levels of CYP2C19
Correct Answer: Reduced levels of UDP-glucuronosyl transferase-1
Explanation:Gilbert’s syndrome is an autosomal recessive condition that results from defective bilirubin conjugation due to a deficiency of UDP glucuronyl transferase – 1. The prevalence is approximately 1-2% in the general population.The clinical presentation of Gilbert’s syndrome include:- Unconjugated hyperbilinaemia- Jaundice can occur during an intercurrent illnessManagement:Blood investigations usually reveal a rise in bilirubin following prolonged fasting or intravenous nicotinic acid.No treatment required for these patients.Other options:- CYP2C9 deficiency causes reduced warfarin metabolism, and subsequent enhanced drug effects. – Pancreatic disease, cholestasis, excessive alcohol consumption and certain drugs are common causes of raised GGT levels- Defective hepatocyte excretion of conjugated bilirubin is related to the pathophysiology of Dubin-Johnson syndrome- Reduced CYP2C19 levels can lead to the disordered metabolism of clopidogrel and other drugs such as proton-pump inhibitors, anticonvulsants and sedatives.
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This question is part of the following fields:
- Dermatology
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Question 30
Incorrect
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A well preterm baby in a thermo-neutral environment requires how much energy to maintain essential body functions?
Your Answer: 100kcal/kg/day
Correct Answer: 50kcal/kg/day
Explanation:The average amount of energy required by a well preterm baby in a thermo-neutral environment is 50/kcal/kg to maintain essential body functions while it takes about 70 kcal/kg/day for optimal growth. It is important to ensure that enough proteins are given per calorie to limit catabolism and promote cell building. Caloric need usually increases when the baby is ill.
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This question is part of the following fields:
- Nutrition
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Question 31
Incorrect
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All of the following drugs tend to worsen the symptoms of myasthenia gravis except?
Your Answer: Pyridostigmine
Correct Answer: Prednisolone
Explanation:Prednisone is used for the treatment of myasthenia gravis if there is no initial response to the anticholinesterase medications. Pyridostigmine can make the symptoms of myasthenia gravis worse if used in the initial stages of treatment.
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This question is part of the following fields:
- Pharmacology
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Question 32
Incorrect
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A 11 year old girl with a history of recurrent chest infections, was admitted with a fever, productive cough, anorexia and weight loss. On examination she was febrile and tachycardic. Her mother said that the girl was not thriving well. Which of the following organisms is responsible for this presentation?
Your Answer: Staphylococcus
Correct Answer: Pseudomonas
Explanation:History of recurrent infections and failure to thrive (probably due to pancreatic enzyme insufficiency) is highly suggestive of cystic fibrosis. Pseudomonas has been identified as an important respiratory pathogen in patients with cystic fibrosis.
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This question is part of the following fields:
- Infectious Diseases
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Question 33
Incorrect
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A 6 year old child diagnosed with minimal change nephrotic syndrome, presents with lower limb oedema. Which of the following is most likely lost upon urination?
Your Answer: Factor VIII
Correct Answer: Anti-thrombin III
Explanation:Minimal change nephrotic syndrome leads to the loss of anti-thrombin III which protects the body from forming venous emboli. It may be triggered by virus, immunisations, medication, non-Hodgkin lymphoma, or leukaemiaCharacterised by oedema, proteinuria, hypoalbuminemia, and hypercholesterolemia.
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This question is part of the following fields:
- Nephro-urology
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Question 34
Incorrect
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Which of the following does the inferior mesenteric artery supply?
Your Answer: The greater curvature of the stomach
Correct Answer: From the splenic flexure to the first third of the rectum
Explanation:The coeliac axis supplies the liver and stomach and from the oesophagus to the first half of the duodenum. The second half of the duodenum to the first two thirds of the transverse colon is supplied by the superior mesenteric artery. The inferior mesenteric supplies the last third of the transverse colon (approximately from the splenic flexure) to the first third of the rectum. The last two thirds of the rectum are supplied by the middle rectal artery. The greater curvature of the stomach is supplied by branches of the splenic artery, which itself comes from the coeliac axis.
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This question is part of the following fields:
- Gastroenterology And Hepatology
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Question 35
Incorrect
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An 8 year old male child presents with frequent and recurrent headaches and a history of dark-coloured urine. He has a blood pressure of 150/100 mmHg and normal serum urea and creatinine levels. Urine microscopy reveals erythrocytes and erythrocyte casts. His 24-hour urine protein is about 2 g. What is the most probable diagnosis?
Your Answer: Polyarteritis nodosa
Correct Answer: Acute nephritic syndrome
Explanation:The child most likely has nephritic syndrome which is characterised by a reduced renal function, proteinuria of non-nephrotic range, haematuria, erythrocyte casts, and oedema. Polyarteritis nodosa usually occurs in middle-aged men but can also be seen in young children. It is accompanied by severe systemic manifestations such as fever, malaise, weight loss and myalgia.Renal cell carcinoma usually presents around 55 years with the classic triad of haematuria, loin pain and a unilateral mass in the flank.Polycystic kidney disease usually presents in adult life with acute loin pain and palpation of masses in the flanks.
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This question is part of the following fields:
- Nephro-urology
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Question 36
Incorrect
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A child is admitted with a febrile illness. Which of the following is of concern?
Your Answer: A 10 month old with heart rate of 110
Correct Answer: A 6 month old with a systolic blood pressure of 60
Explanation:Age (years) Respiratory rate (per minute) Heart rate (per minute) Systolic blood pressure<1 30-40 110-160 70-901-2 25-35 100-150 80-952-5 25-30 95-140 80-1005-12 20-25 80-120 90-110>12 15-20 60-100 100-120Adapted from Advanced Paediatric Life Support Manual
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This question is part of the following fields:
- Emergency Medicine
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Question 37
Incorrect
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A 8 year old child presents with fresh rectal bleeding. Which of the following statements is true?
Your Answer: Ulcerative colitis is an unlikely diagnosis if polyps are seen
Correct Answer: Intestinal hamartomatous polyps are seen in Cowden syndrome
Explanation:Colonic Polyposis and neoplasia are often seen in Cowden Syndrome which is a hamartomatous polyposis syndrome. Patients with Cowden syndrome have an increased risk for colorectal cancer.
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This question is part of the following fields:
- Gastroenterology And Hepatology
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Question 38
Incorrect
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A neonate is born with a suspected duct dependent cyanotic heart disease. Which of the following should be used in the immediate management of the condition?
Your Answer: Propranolol
Correct Answer: Prostaglandin E1
Explanation:Severe cyanotic heart diseases such as pulmonary stenosis, transposition of the great vessels, hypoplastic left heart syndrome and truncus arteriosus all run the risk of a poor prognosis for a neonate. To continue the supply of oxygen the ductus arteriosus must be kept patent. This can be done with the immediate administration of Prostaglandin E1 as a temporary measure until a surgical intervention such as an atrial septostomy can be done. The closure of the duct can subsequently be initiated with the administration of indomethacin and oxygen.
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This question is part of the following fields:
- Neonatology
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Question 39
Incorrect
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An infant born at 34 weeks was kept in the incubator for almost a month. Physical examination revealed a heart murmur, which however was not present at discharge. What is the most probable cause of this murmur?
Your Answer: Aneurysm of sinus of Valsalva
Correct Answer: PDA
Explanation:PDA is particularly common in premature babies and it is managed by indomethacin administration. However, if PDA is not the only defect, prostaglandin E1 can be administered in order to keep the ductus open until the surgery takes place.
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This question is part of the following fields:
- Cardiovascular
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Question 40
Incorrect
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A 16-year-old boy suffers recurrent episodes of haematuria following a flu-like illness. He is otherwise well. Physical examination is normal. Urinalysis reveals no proteinuria, blood ++, and 2–3 white blood cells/mm3. What is the most probable diagnosis?
Your Answer: Goodpasture’s syndrome
Correct Answer: IgA nephropathy
Explanation:IgA nephropathy’s characteristic presentation is haematuria following a non-specific upper respiratory infection as was evident in this case. IgA nephropathy also usually occurs in children and young males, like this patient.
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This question is part of the following fields:
- Renal
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Question 41
Incorrect
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A father brought his 6-year-old son with cystic fibrosis to the ER department due to massive hematemesis. He is hypotensive and has a tachycardia. Which is the most likely diagnosis?
Your Answer: Aorto-intestinal fistula
Correct Answer: Bleeding oesophageal varices
Explanation:Bleeding oesophageal varices secondary to portal hypertension can cause a massive gastrointestinal haemorrhage resulting in shock. Perforated ulcer is less likely in this age group. Mallory Weiss tear would not likely result in a massive haemorrhage. Aorto-intestinal fistula is more common in older patients with abdominal aneurysms. Boerhaave’s syndrome is a result of a ruptured oesophagus following excessive vomiting.
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This question is part of the following fields:
- Respiratory
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Question 42
Correct
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A 10-year-old girl was brought to the hospital following a seizure episode. On examination, hypopigmented macules were found on her abdomen with acne-like eruptions on her face. Also, her fingers show small periungual fibrous papules. Her parents said that she has learning disabilities. What is the most probable diagnosis?
Your Answer: Tuberous sclerosis (Bourneville’s disease)
Explanation:The most probable diagnosis for this patient, according to the clinical scenario provided is tuberous sclerosis. It is an autosomal-dominant disorder characterised by hamartomas located throughout the body, often prominently involving the central nervous system and skin. Two loci on chromosomes 9 and 16 have been identified to be associated with this condition. The condition has a variable expression and penetrance and is further characterised by:- Seizures (usually infantile spasms)- Developmental delay- Facial/cutaneous angiofibromas (adenoma sebaceum)- Periungual fibromas (pink projections from the nail folds)- Shagreen patches (leathery thickenings of the skin usually on the back) – Ash leaf macules (areas of depigmentation that become visible under a Wood’s light)- Fundoscopy may reveal white streaks along the fundal vessels.
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This question is part of the following fields:
- Dermatology
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Question 43
Incorrect
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Which of the following is NOT true of the femoral nerve?
Your Answer: It supplies sartorius
Correct Answer: It supplies adductor longus
Explanation:The femoral nerve is the main nerve supply for the thigh muscles including the pectineus, iliacus, sartorius, which flex the hip| and the quadriceps femoris made up of the rectus femoris, vests laterals, vastus medialis and vastus intermedius, which extend the knee. The nerve is derived from the L2, L3 and L4 nerve roots, and supplies cutaneous branches to the anteromedial thigh and the medial side of the leg via the saphenous nerve.
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This question is part of the following fields:
- Musculoskeletal
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Question 44
Incorrect
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Which among the following neurological signs is likely to be present on examination following the successful administration of a median nerve block?
Your Answer: An obvious wrist drop deformity
Correct Answer: Inability to abduct the thumb
Explanation:Successful administration of median nerve block can be confirmed by the inability to abduct the thumb. The median nerve supplies all the muscles in the anterior compartment of the forearm, apart from the flexor carpi ulnaris and the flexor digitorum profundus to the outer two fingers: so these two fingers can still be flexed. There is a sensory loss to the thumb, index, middle and half of the ring fingers. Absence of thumb abduction due to paralysis of abductor pollicis brevis is a good test for median nerve paralysis.Other options:- The radial nerve supplies the extensors – hence wrist drop does not occur in this scenario. – The ulnar nerve supplies the skin of the ulnar side of the hand. Hence anaesthesia will not affect this area. – The ulnar nerve also supplies the interossei muscles of the hand, which affect abduction and adduction of the fingers.
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This question is part of the following fields:
- Anatomy
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Question 45
Incorrect
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What is the risk of an affected mother’s son inheriting the disease condition in an X-liked dominant condition?
Your Answer: 25%
Correct Answer: 0.5
Explanation:In the pattern of mendelian inheritance, X- linked dominant inheritance means that all who inherit the X chromosome will present with the condition. In the case of maternal x-linked inheritance, sons and daughters have an equal chance of inheriting the condition as there is a 50% chance of inheriting the defective X chromosome from their mother as opposed to a non affected X chromosome from their father. However, in paternal X-linked dominant inheritance, sons will be unaffected as they inherit a Y chromosome from their father while daughters are sure to inherit the defective X-chromosome.
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This question is part of the following fields:
- Genetics And Dysmorphology
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Question 46
Incorrect
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An 8 year old male is brought by the paramedics to the emergency department after having an episode of generalised tonic-clonic seizures. The seizures started at 10:55. The paramedics gave him buccal midazolam at 11:04 and waited for the seizures to end, until 11:06. Afterwards, they gave him oxygen via face mask and set up a venous line. His blood glucose at that moment was 5.2 mmol/L and he remained unconscious during the whole trip to the hospital. The paramedics arrived at the emergency department at 11:16 and you observe that he has a patent airway and a good air entry. His RR is 12 and his O2 saturation is 98% on 10L O2. His heart rate is 122 bpm and his CRT is 2 seconds. At 11:19, you observe that the child is not responsive to pain and he starts experiencing subtle but persistent jerking movements of his jaw and left upper limb. You notice that the child's pupils are deviated to the right and are bilaterally constricted. It's 11:20. What should you do next?
Your Answer: Observe for further 4 minutes while preparing IV lorazepam
Correct Answer: Administer IV lorazepam now
Explanation:NICE guidelines suggest that at the premonitory stage (pre-hospital) the patient should receive Diazepam 10−20 mg given rectally, or midazolam 10 mg given buccally. If seizures continue, the patient should receive lorazepam IV.
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This question is part of the following fields:
- Neurology And Neurodisability
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Question 47
Correct
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A 14-year-old boy arrives at the clinic with difficulty walking and foot drop. On examination, there is weakness in dorsiflexion and eversion of the right foot. A small area of sensory loss over the dorsum of the right foot is also present. Which of the following is the most likely diagnosis?
Your Answer: Common peroneal nerve lesion
Explanation:Injuries to the peroneal nerve can cause numbness, tingling, pain, weakness and foot drop. The branches of the common peroneal nerve innervate and control the muscles in the legs that lift the ankle and toes upward (dorsi flexion).
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This question is part of the following fields:
- Neurology And Neurodisability
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Question 48
Incorrect
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A 15-year-old Afro-Caribbean boy presents with a temperature of 38.5℃ and acute abdominal pain. He has previously undergone a splenectomy secondary to sickle cell disease. On examination, he’s found to be tachycardic. Abdominal examination reveals guarding. An ultrasound scan shows gall stones in the gall bladder, free fluid in the pelvis and an appendix with a diameter of 8 mm.What is the most probable diagnosis?
Your Answer: Impacted Gall Stone
Correct Answer: Acute Appendicitis
Explanation:Based on the clinical scenario, the most probable diagnosis is acute appendicitis.Acute appendicitis presents typically with central abdominal pain migrating to the right iliac fossa, anorexia, nausea and fever. The temperature usually does not go beyond 40C. Although appendicitis is a clinical diagnosis, an ultrasound scan showing an appendix width of greater than 6mm is diagnostic.Pyrexia, guarding, and pain are all in keeping with appendicitis.Other options:- Cholecystitis is very rare in children, and although gall stones are present, there is no jaundice or biliary tree dilatation suggested by the scan.- Impacted Gall Stone: There is no mention of common bile duct dilatation in the clinical scenario.- Sickle Cell Crisis: A sickle cell crisis should not cause guarding, or an ultrasound scan finding of a dilated appendix base.- Gastroenteritis: Gastroenteritis would not produce the ultrasound scan findings described above with a thickened appendix.
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This question is part of the following fields:
- Paediatric Surgery
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Question 49
Incorrect
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A 17 year old girl is taken to the hospital with a 10 hour history of pelvic pain. Her last normal menstrual cycle was 14 days ago and she is otherwise well. Her abdomen was soft with mild suprapubic pain on examination. What is the underlying cause?
Your Answer: Degenerating fibroid
Correct Answer: Mittelschmerz
Explanation:Answer: MittelschmerzMittelschmerz is midcycle abdominal pain due to leakage of prostaglandin-containing follicular fluid at the time of ovulation. It is self-limited, and a theoretical concern is treatment of pain with prostaglandin synthetase inhibitors, which could prevent ovulation. The pain of mittelschmerz usually occurs in the lower abdomen and pelvis, either in the middle or to one side. The pain can range from a mild twinge to severe discomfort and usually lasts from minutes to hours. In some cases, a small amount of vaginal bleeding or discharge might occur. Some women have nausea, especially if the pain is very strong.Diagnosis of pelvic pain in women can be challenging because many symptoms and signs are insensitive and nonspecific. As the first priority, urgent life-threatening conditions (e.g., ectopic pregnancy, appendicitis, ruptured ovarian cyst) and fertility-threatening conditions (e.g., pelvic inflammatory disease, ovarian torsion) must be considered. Many women never have pain at ovulation. Some women, however, have mid-cycle pain every month, and can tell by the pain that they are ovulating.As an egg develops in the ovary, it is surrounded by follicular fluid. During ovulation, the egg and the fluid, as well as some blood, are released from the ovary. While the exact cause of mittelschmerz is not known, it is believed to be caused by the normal enlargement of the egg in the ovary just before ovulation. Also, the pain could be caused by the normal bleeding that comes with ovulation.Pelvic inflammatory disease can be ruled out if the patient is not sexually active.
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This question is part of the following fields:
- Paediatric Surgery
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Question 50
Incorrect
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Proteinuria is NOT a recognized feature of which of the following conditions?
Your Answer: Coeliac disease
Correct Answer: Landau-Kleffner syndrome
Explanation:Proteinuria refers to an increased amount of protein excretion in urine, which should be greater than 100mg/m2 per day on a single spot urine collection. The limit is even more relaxed for infants and neonates. Proteinuria is a prominent manifestation of cystinosis, acute tubular necrosis, Fanconi syndrome, and celiac disease. Landau-Kleffner syndrome is a rare childhood convulsive disorder, associated with acquired aphasia and auditory verbal agnosia.
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This question is part of the following fields:
- Nephro-urology
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Question 51
Incorrect
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A normal 6-month-old child is NOT expected to do which of the following?
Your Answer: Roll over
Correct Answer: Sit unsupported for 10 minutes
Explanation:Milestones of 6 monthsSocial and EmotionalKnows familiar faces and begins to know if someone is a stranger Likes to play with others, especially parents Responds to other people’s emotions and often seems happy Likes to look at self in a mirror Language/CommunicationResponds to sounds by making sounds Strings vowels together when babbling (“ah,” “eh,” “oh”) and likes taking turns with the parent while making sounds Responds to own name Makes sounds to show joy and displeasure Begins to say consonant sounds (jabbering with “m,” “b”) Cognitive (learning, thinking, problem-solving)Looks around at things nearby Brings things to mouth Shows curiosity about things and tries to get things that are out of reach Begins to pass things from one hand to the other Movement/Physical DevelopmentRolls over in both directions (front to back, back to front) Begins to sit without support When standing, supports weight on legs and might bounce Rocks back and forth, sometimes crawling backwards before moving forward
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This question is part of the following fields:
- Child Development
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Question 52
Incorrect
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A 13-month-old boy presents to the hospital with a rash and breathing difficulties following routine vaccination. On examination, it was noted that he was developing swelling around the mouth and neck.What is the most appropriate next step to manage this child?
Your Answer: IM adrenaline 300 mcg (0.3ml of 1 in 1,000)
Correct Answer: IM adrenaline 150 mcg (0.15ml of 1 in 1,000)
Explanation:The IM dose of adrenaline for anaphylaxis in:< 6 months: 150 micrograms (0.15ml 1 in 1,000)6 months - 6 years: 150 micrograms (0.15ml 1 in 1,000)6 - 12 years: 300 micrograms (0.3ml 1 in 1,000)Adult and child > 12 years: 500 micrograms (0.5ml 1 in 1,000)Anaphylaxis:Anaphylaxis is an acute, rapidly progressing, potentially life-threatening IgE mediated Type I hypersensitivity reaction.It involves the release of mediators from mast cells, basophils and inflammatory cells. It is characterised by oedematous swelling of the airway mucosa giving rise to dyspnoea and respiratory distress. The most common cause of anaphylaxis in children is a food allergy.Risk factors for death in patients with anaphylaxis include asthma, age 11+, peanut allergy, and delay in adrenaline administration.Management of anaphylaxis includes:- ABCD- Remove the allergen- IM adrenaline or Nebulised adrenaline- IV Hydrocortisone – pro re nata IV fluid support. – Followed by observation.
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This question is part of the following fields:
- Emergency Medicine
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Question 53
Incorrect
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A 1 day old baby girl is born with severe respiratory compromise. She is seen to have a scaphoid abdomen and an absent apex beat. Which anomaly does this baby have?
Your Answer: Necrotising enterocolitis
Correct Answer: Bochdalek hernia
Explanation:Answer: Bochdalek herniaA Bochdalek hernia is one of two forms of a congenital diaphragmatic hernia, the other form being Morgagni hernia. A Bochdalek hernia is a congenital abnormality in which an opening exists in the infant’s diaphragm, allowing normally intra-abdominal organs (particularly the stomach and intestines) to protrude into the thoracic cavity. In the majority of patients, the affected lung will be deformed, and the resulting lung compression can be life-threatening. Bochdalek hernias occur more commonly on the posterior left side (85%, versus right side 15%).In normal Bochdalek hernia cases, the symptoms are often observable simultaneously with the baby’s birth. A few of the symptoms of a Bochdalek Hernia include difficulty breathing, fast respiration and increased heart rate. Also, if the baby appears to have cyanosis (blue-tinted skin) this can also be a sign. Another way to differentiate a healthy baby from a baby with Bochdalek Hernia, is to look at the chest immediately after birth. If the baby has a Bochdalek Hernia it may appear that one side of the chest cavity is larger than the other and or the abdomen seems to be scaphoid (caved in).Situs inversus (also called situs transversus or oppositus) is a congenital condition in which the major visceral organs are reversed or mirrored from their normal positions. The normal arrangement of internal organs is known as situs solitus while situs inversus is generally the mirror image of situs solitus. Although cardiac problems are more common than in the general population, most people with situs inversus have no medical symptoms or complications resulting from the condition, and until the advent of modern medicine it was usually undiagnosed. In the absence of congenital heart defects, individuals with situs inversus are homeostatically normal, and can live standard healthy lives, without any complications related to their medical condition. There is a 5–10% prevalence of congenital heart disease in individuals with situs inversus totalis, most commonly transposition of the great vessels. The incidence of congenital heart disease is 95% in situs inversus with levocardia.Cystic fibrosis is a progressive, genetic disease that causes persistent lung infections and limits the ability to breathe over time. In people with CF, mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene cause the CFTR protein to become dysfunctional. When the protein is not working correctly, it’s unable to help move chloride — a component of salt — to the cell surface. Without the chloride to attract water to the cell surface, the mucus in various organs becomes thick and sticky. In the lungs, the mucus clogs the airways and traps germs, like bacteria, leading to infections, inflammation, respiratory failure, and other complications. Necrotizing enterocolitis (NEC) is a medical condition where a portion of the bowel dies. It typically occurs in new-borns that are either premature or otherwise unwell. Symptoms may include poor feeding, bloating, decreased activity, blood in the stool, or vomiting of bile.The exact cause is unclear. Risk factors include congenital heart disease, birth asphyxia, exchange transfusion, and premature rupture of membranes. The underlying mechanism is believed to involve a combination of poor blood flow and infection of the intestines. Diagnosis is based on symptoms and confirmed with medical imaging.Morgagni hernias are one of the congenital diaphragmatic hernias (CDH), and is characterized by herniation through the foramen of Morgagni. When compared to Bochdalek hernias, Morgagni hernias are:-anterior-more often right-sided (,90%)-small-rare (,2% of CDH)-at low risk of prolapseOnly ,30% of patients are symptomatic. New-borns may present with respiratory distress at birth similar to a Bochdalek hernia. Additionally, recurrent chest infections and gastrointestinal symptoms have been reported in those with previously undiagnosed Morgagni hernia.The image of the transverse colon is herniated into the thoracic cavity, through a mid line defect and this indicates that it is a Morgagni hernia since the foramen of a Morgagni hernia occurs in the anterior midline through the sternocostal hiatus of the diaphragm, with 90% of cases occurring on the right side.Clinical manifestations of congenital diaphragmatic hernia (CDH) include the following:Early diagnosis – Right-side heart| decreased breath sounds on the affected side| scaphoid abdomen| bowel sounds in the thorax, respiratory distress, and/or cyanosis on auscultation| CDH can often be diagnosed in utero with ultrasonography (US), magnetic resonance imaging (MRI), or bothLate diagnosis – Chest mass on chest radiography, gastric volvulus, splenic volvulus, or large-bowel obstructionCongenital hernias (neonatal onset) – Respiratory distress and/or cyanosis occurs within the first 24 hours of life| CDH may not be diagnosed for several years if the defect is small enough that it does not cause significant pulmonary dysfunctionCongenital hernias (childhood or adult onset) – Obstructive symptoms from protrusion of the colon, chest pain, tightness or fullness the in chest, sepsis following strangulation or perforation, and many respiratory symptoms occur.
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This question is part of the following fields:
- Paediatric Surgery
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Question 54
Incorrect
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As the junior doctor on call in the neonatal unit, you have been informed of a case of ambiguous genitalia in which the midwife was unable to decide the gender at birth. What is the most appropriate course of action in this case?
Your Answer: Inform the parents that the chromosomes will need to be done and after this result they will be informed what gender the child should be reared as
Correct Answer: Inform the parents that a number of investigations will need to be performed and that they will need to wait before a sex is assigned
Explanation:Cases of neonatal infant ambiguous genitalia can be a great source of psychological stress for families. One of the most important next steps in managing the case is reassuring the parents that the best care will be given to the baby and then informing them about the investigations that will need to be performed before a sex can be assigned. The sex should not be guessed just by examination nor assigned by karyotyping. Thorough investigations must be completed with the help of endocrinologists for the best outcome.
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This question is part of the following fields:
- Endocrinology
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Question 55
Incorrect
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A 15-year-old girl is admitted to hospital following a ruptured ectopic pregnancy. She comes from a family of Jehovah's Witnesses. Her haemoglobin on admission is 6.7 g/dl. She consents to a blood transfusion but her mother refuses. What is the most appropriate course of action?
Your Answer: Advise the parents she will have to get a High Court injunction in order to stop the transfusion
Correct Answer: Give the blood transfusion
Explanation:People aged 16 or over are entitled to consent to their own treatment. This can only be overruled in exceptional circumstances. Children under the age of 16 can consent to their own treatment if they’re believed to have enough intelligence, competence and understanding to fully appreciate what’s involved in their treatment. This is known as being Gillick competent.Otherwise, someone with parental responsibility can consent for them.This could be:the child’s mother or fatherthe child’s legally appointed guardiana person with a residence order concerning the childa local authority designated to care for the childa local authority or person with an emergency protection order for the child.Giving the blood transfusion is therefore both clinically and ethically the right course of action.Jehovah’s Witnesses frequently carry a signed and witnessed Advance Decision Document listing the blood products and autologous procedures that are, or are not, acceptable to them It is appropriate to have a frank, confidential discussion with the patient about the potential risks of their decision and the possible alternatives to transfusion, but the freely expressed wish of a competent adult must always be respected.
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This question is part of the following fields:
- Emergency Medicine
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Question 56
Incorrect
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A 5 month old boy is admitted with recurrent, brief grand mal seizures. Cranial CT reveals various circular lesions and renal ultrasound shows discrete cysts. Family history reveals that his father has had a renal transplant and has profound acne-like spots on his nose and cheeks. Which of the following is the most probable diagnosis?
Your Answer: Mitochondrial disorder
Correct Answer: Tuberous sclerosis
Explanation:Tuberous sclerosis presents with the growth of numerous noncancerous (benign) tumours in many parts of the body. They may appear in the brain, kidneys, skin or various other organs.
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This question is part of the following fields:
- Nephro-urology
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Question 57
Correct
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A patient complaining of loss of taste in the anterior 2/3 of the tongue has most likely suffered damage to which nerve?
Your Answer: Facial nerve
Explanation:The hypoglossal nerve (CN XII) provides motor innervation to all of the intrinsic and extrinsic muscles of the tongue except for the palatoglossus muscle, which is innervated by the vagus nerve (CN X). It runs superficial to the hyoglossus muscle. Lesions of the hypoglossal nerve cause deviation of the tongue to the ipsilateral (i.e., damaged) side.Taste to the anterior two-thirds of the tongue is achieved through innervation from the chorda tympani nerve, a branch of the facial nerve (CN VII). General sensation to the anterior two-thirds of the tongue is by innervation from the lingual nerve, a branch of the mandibular branch of the trigeminal nerve (CN V3). The lingual nerve is located deep and medial to the hyoglossus muscle and is associated with the submandibular ganglion.On the other hand, taste to the posterior one-third of the tongue is accomplished through innervation from the glossopharyngeal nerve (CN IX), which also provides general sensation to the posterior one-third of the tongue.Taste perception also is performed by both the epiglottis and the epiglottic region of the tongue, which receives taste and general sensation from innervation by the internal laryngeal branch of the vagus nerve (CN X). Damage to the vagus nerve (CN X) causes contralateral deviation (i.e., away from the injured side) of the uvula.
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This question is part of the following fields:
- ENT
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Question 58
Incorrect
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A 16-year-old boy presents with complaints of ear pain. The pain started last night and prevented him from sleeping. He reports that sounds are muffled on the affected side. On examination, he has a fever. A bulging tympanic membrane with a visible fluid level is seen on otoscopy. You suspect a diagnosis of acute suppurative otitis media. Tensor tympani is a muscle that is found in the middle ear. What is the nerve supplying the tensor tympani?
Your Answer: Glossopharyngeal nerve
Correct Answer: Mandibular nerve
Explanation:The nerve supply to the tensor tympani is the mandibular nerve.The mandibular nerve is the only division of the trigeminal nerve that carries motor fibres.Tensor tympani is a muscle that lies in a bony canal just superior to the pharyngotympanic tube. It originates from the cartilaginous portion of the pharyngotympanic tube, the bony canal in which it sits, and the greater wing of the sphenoid bone. It inserts into the upper part of the handle of the malleus. When contracted, it pulls the handle of the malleus medially. This action increases the tension across the tympanic membrane, reducing the magnitude of vibrations transmitted into the middle ear. This dampens loud noises or noises produced by chewing. Tensor tympani is innervated through the nerve to tensor tympani, which arises from the mandibular nerve.Other options:- The vestibulocochlear nerve is the eighth cranial nerve. This nerve has two components, a vestibular division that carries balance information, and a cochlear division that carries hearing information.- The glossopharyngeal nerve is the ninth cranial nerve. It has a wide range of functions. It carries taste and sensation from the posterior third of the tongue, as well as sensation from the pharyngeal wall and tonsils, the middle ear, external auditory canal and auricle. It carries parasympathetic fibres that supply the parotid gland. It also supplies the baroreceptors and chemoreceptors of the carotid sinus and supplies the secretomotor fibres to the parotid gland.- The maxillary nerve carries only sensory fibres.- The facial nerve is the seventh cranial nerve. It supplies the muscles of facial expression, as well as stylohyoid, the posterior belly of digastric, and stapedius (the only other muscle associated with the middle ear). It carries taste from the anterior two-thirds of the tongue and sensation from part of the external acoustic meatus, parts of the auricle and the retro-auricular area. It provides secretomotor fibres which supply to the submandibular gland, sublingual gland (via chorda tympani nerve), nasal glands and lacrimal glands.
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This question is part of the following fields:
- Neurology And Neurodisability
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Question 59
Incorrect
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A 5-year-old girl was admitted for fever, anaemia, thrombocytopenia and signs of pulmonary infection. She now presents a few days later with signs of meningism. What is the most probable diagnosis?
Your Answer: Aplastic Anaemia
Correct Answer: Acute lymphoblastic leukaemia (ALL)
Explanation:Acute lymphoblastic leukaemia (ALL) is a cancer of the lymphoid line of blood cells characterized by the development of large numbers of immature lymphocytes. Symptoms may include feeling tired, frequent infections with fever as well as anaemia with thrombocytopenia. As an acute leukaemia, ALL progresses rapidly and is typically fatal within weeks or months if left untreated. The patient’s age also favours the diagnosis of ALL as it occurs most commonly in children, particularly those between the ages of two and five.
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This question is part of the following fields:
- Haematology And Oncology
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Question 60
Incorrect
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A 17-year-old female was given an antibiotic for a urinary tract infection. After taking the medication the patient developed Steven-Johnson syndrome. Which particular antibiotic usually causes Steven-Johnson syndrome?
Your Answer:
Correct Answer: Sulphonamides
Explanation:Stevens–Johnson syndrome (SJS) is a type of severe skin reaction. The most common cause is certain medications such as lamotrigine, carbamazepine, allopurinol, sulphonamide antibiotics, and nevirapine.
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This question is part of the following fields:
- Genitourinary
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