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Question 1
Correct
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Which of the following dermatological conditions is not recognised to be associated with Crohn's disease?
Your Answer: Xanthomas
Explanation:CUTANEOUS DISORDERS OR DERMATOSIS ASSOCIATED WITH IBD- Psoriasis- Secondary amyloidosis- Vitiligo- Acquired epidermolysis bullosaIn some cases, non-granulomatous skin disorders occur as a reaction to the intestinal disease. These include:- Pyoderma gangrenosum- Neutrophilic dermatosis / Sweet syndrome, typically with pustules- Pyodermatitis-pyostomatitis vegetans, a purulent erosive dermatosis characterised by snail-track ulcers- Erythema multiforme- Erythema nodosum- Acneiform eruptions including nodulocystic acne, hidradenitis suppurativa and folliculitis- Palisaded neutrophilic and granulomatous dermatitis- Necrotizing and granulomatous small vessel vasculitis.
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This question is part of the following fields:
- Gastroenterology And Hepatology
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Question 2
Correct
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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: 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 3
Correct
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A 2-month-old infant was brought to the paediatrics ward by her mother with a complaint of excessive crying during urination. The urine culture of the infant revealed E.coli. Which of the following investigations should be done next?
Your Answer: US
Explanation:Urine culture confirms a diagnosis of a UTI. A kidney ultrasound will be the next best investigation because it will help us to visualise the bladder, kidneys, and ureters to rule out any congenital obstruction in the urinary tract that might be the actual cause of infection in this 2-month old girl.
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This question is part of the following fields:
- Renal
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Question 4
Correct
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Which among the following is a type of acquired anterior pituitary disorder?
Your Answer: Pituitary adenoma
Explanation:Among the given options, pituitary adenoma is an acquired anterior pituitary disorder which represent between 10 and 25% of all intracranial neoplasms.Other options:- Agenesis of the corpus callosum is characterised by the partial or complete absence of the corpus callosum. This condition is associated with pituitary hormone deficiencies.- Congenital disorders such as hydrocephalus or arachnoid cysts may be a cause of precocious puberty.- Pituitary hypoplasia and septo-optic dysplasia are congenital disorders of the pituitary gland.
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This question is part of the following fields:
- Endocrinology
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Question 5
Correct
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Two boys were playing when one of them brought the forearm of the other behind his back. This resulted in a stretching of the lateral rotator of the arm. Which of the following muscles was most likely to have been involved?
Your Answer: Infraspinatus
Explanation:There are two lateral rotators of the arm, the infraspinatus and the teres minor muscles. The infraspinatus muscle receives nerve supply from C5 and C6 via the suprascapular nerve, whilst the teres minor is supplied by C5 via the axillary nerve.
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This question is part of the following fields:
- Musculoskeletal
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Question 6
Incorrect
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A 13-year-old boy presents with a two-week history of malaise, sore throat, odynophagia, and dysphagia. On examination, patchy white spots were noted in his oropharynx. An upper GI endoscopy revealed similar lesions in the oesophagus. Which of the following is most likely to identify the underlying pathology in this patient?
Your Answer: Oesophageal biopsy for histology
Correct Answer: Viral serology
Explanation:Based on the given scenario, the most probable diagnosis for this patient is acquired immune deficiency syndrome (AIDS) caused by human immunodeficiency virus (HIV). Thus, the most appropriate investigation to confirm the underlying pathology in this patient would be viral serology. Rationale:The presence of oesophageal candidiasis is highly suggestive of severe immunosuppression. The causes of immunosuppression can be chemotherapy, with haematological malignancy, HIV or inhaled steroids. In patients with HIV, oesophageal candidiasis is part of the spectrum of AIDS-defining illnesses and usually occurs when the CD4 count is < 200 cells/microL. Other AIDS-defining illnesses include PCP pneumonia and CMV infections.Oesophageal Candidiasis:It is characterised by white spots in the oropharynx with extension into the oesophagus. It seldom occurs without an associated underlying risk factor like broad-spectrum antibiotic usage, immunosuppression and immunological disorders.Patients may present with oropharyngeal symptoms, odynophagia and dysphagia.Treatment is directed both at the underlying cause (which should be investigated for) and with oral antifungal agents.
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This question is part of the following fields:
- Gastroenterology And Hepatology
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Question 7
Correct
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A pathologist examines a histological section and identifies a clump of Reed Sternberg cells.What is the most likely diagnosis?
Your Answer: Hodgkin's lymphoma
Explanation:Reed-Sternberg cells are classically associated with Hodgkin lymphoma.Classical diagnostic Reed-Sternberg cells are large (15 to 45 micrometres), have abundant slightly basophilic or amphophilic cytoplasm and have at least two nuclear lobes or nuclei. Diagnostic Reed-Sternberg cells must have at least two nucleoli in two separate nuclear lobes. The nuclei are large and often rounded in contour with a prominent, often irregular nuclear membrane, pale chromatin and usually one prominent eosinophilic nucleolus, with perinuclear clearing (halo), resembling a viral inclusion.
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This question is part of the following fields:
- Haematology And Oncology
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Question 8
Correct
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A 6 year old boy has been taken to his local hospital for his third sore throat in one month. Doctors have discovered bleeding from his gums and nose. He is also presenting with pale conjunctiva. From the list of options, what is the single cell type most likely to be seen on microscopy?
Your Answer: Blast cells
Explanation:Many of the symptoms favour blast cells: the patient’s young age| a reoccurring sore throat caused by neutropenia and abnormal lymphoblasts| pale conjunctiva due to reduced production of red blood cells (this is because the marrow has been occupied by blast cells). There are no risk factors present for aplastic anaemia, and congenital aplastic anaemia would present itself earlier in life. A bone marrow aspiration would be needed to confirm the diagnosis.
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This question is part of the following fields:
- ENT
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Question 9
Incorrect
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A strict gluten-free diet is a dietary treatment for coeliac disease.Which one of the following statements concerning the gluten-free diet is correct?
Your Answer: Gluten-free products (e.g. breads, pasta, biscuits and crackers) are as nutritious in terms of their micronutrient contents as those containing gluten
Correct Answer: Buckwheat is suitable in a gluten-free diet
Explanation:Buckwheat is not wheat. It’s a seed rather than a grain, which means it’s gluten-free and safe for people with celiac disease and non-celiac gluten sensitivity. It is an excellent source of fibre and nutrients.
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This question is part of the following fields:
- Nutrition
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Question 10
Correct
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A 3 year old child was brought in by her father with complaints of watery diarrhoea, vomiting and low grade fever. She looked slightly dehydrated. According to her parents, the other children in the school also have a similar illness. The most likely causative organism in this case would be?
Your Answer: Rotavirus
Explanation:Rota virus is the leading cause of vital gastroenteritis among children from 6 months to 6 years of age. It is transferred by feco-oral route and it damages the transport mechanism in the intestinal mucosal cells which leads to electrolyte imbalance that’s why the child suffers from dehydration. Treatment of choice is rehydration and correction of electrolyte imbalance.
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This question is part of the following fields:
- Infectious Diseases
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Question 11
Correct
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6 day old twins are being exclusively breastfed. They are both jaundiced, requiring admission for phototherapy, and have lost 12% and 13% of their birthweights, respectively. They both have serum sodium levels of 145 mmol/L. What is the best advice about fluid management over the next 48 h?
Your Answer: Continue breast-feeding but give full top-ups via bottle/cup feeding
Explanation:Excessive weight loss is generally indicative of suboptimal feeding, and infants with excessive weight loss are potentially dehydrated or at risk of dehydration.Jaundice associated with suboptimal breastfeeding– this is classically associated with weight loss >10% and a vicious cycle of sleepiness that in turn leads to further poor feeding. In the absence of clinical signs of dehydration, no evidence suggests that overhydration is helpful. If the infant is dehydrated, hydration should be given as clinically indicated. However, if the infant can tolerate oral feeding, oral hydration with a breast milk substitute is likely to be superior to intravenous hydration because it reduces enterohepatic circulation of bilirubin and helps wash bilirubin out of the bowel.
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This question is part of the following fields:
- Emergency Medicine
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Question 12
Correct
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A 3-year-old boy was brought at the hospital by his mother due to sudden onset pyrexia with emesis and bilateral facial swelling. Upon history taking, she mentions that she brought her son to the GP who suggested analgesics for his bilateral parotid pain, 2 days ago. What would be the next step of your management?
Your Answer: Reassurance
Explanation:The history is suggestive of mumps. Mumps is a viral disease with initial signs and symptoms including fever, muscle pain, headache, poor appetite, and feeling tired. This is then usually followed by painful swelling of one or both parotid salivary glands. Mumps is a self-limiting condition treated only for symptomatic relief. As he currently is taking analgesics for pain relief, one should only offer reassurance.
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This question is part of the following fields:
- Infectious Diseases
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Question 13
Incorrect
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In Psoriasis, the following is true with regards to topical treatment:
Your Answer: Calcipotriol is available topically, orally, and subcutaneously
Correct Answer: Topical corticosteroid associated side effects include striae, atrophy of the skin, telangiectasia, acneiform rash, and easy bruising
Explanation:Topical treatments are useful in the treatment of mild Psoriasis, or as adjuvant therapy in ultraviolet and systematic treatments. These treatments include moisturisers, dithranol, coal tar, salicylic acid, topical immunomodulators such as calcineurin, topical retinoids, Vitamin D analogues and topical steroids. Topical steroids are known to have a number of side effects such as striae, atrophy of the skin, telangiectasia, acneiform rash, and easy bruising. Localised pustular psoriasis is also associated with topical steroids in higher doses. Use of more than 500 g of hydrocortisone or 50 g clobetasol propionate have been shown to suppress adrenal function. Calcitriol, a vitamin D analogue, is only available as an ointment and does not stain clothes and skin the way dithranol and coal tar are known to.
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This question is part of the following fields:
- Dermatology
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Question 14
Correct
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A chloride sweat test was performed on a 13-year-old boy. Results indicated a high likelihood of cystic fibrosis. This diagnosis is associated with a higher risk of developing which of the following?
Your Answer: Bronchiectasis
Explanation:Cystic fibrosis is a life-threatening disorder that causes the build up of thick mucus in the lungs, digestive tract, and other areas of the body. It is a hereditary autosomal-recessive disease caused by mutations of the CFTR gene. Cystic fibrosis eventually results in bronchiectasis which is defined as a permanent dilatation and obstruction of bronchi or bronchioles.
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This question is part of the following fields:
- Respiratory
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Question 15
Incorrect
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Which of the following statements is MOST appropriate for Turner Syndrome?
Your Answer: Hypogonadotropic hypogonadism is a feature
Correct Answer: Fetal loss in the first trimester is common
Explanation:Turners syndrome is a chromosomal syndrome affecting the development of females. In this condition, all or part of the X chromosome gets deleted, producing the Karyotype 45 XO or 45XO/46XX. Spontaneous foetal loss is common in the first trimester, but foetuses which survive are born small for date, and may have lymphedema, and poor feeding in the neonatal period. These patients face numerous medical and developmental problems throughout their lifetimes including growth and puberty failure due to premature ovarian failure/ hypergonadotropic hypogonadism. However spontaneous puberty can be seen in up to 20% of females with Turner’s syndrome.
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This question is part of the following fields:
- Endocrinology
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Question 16
Incorrect
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A 15-year-old girl presented with generalised excessive hair growth, especially on her limbs. Which one of the following is the most likely cause for her symptoms?
Your Answer: Her excessive hair growth is associated with hereditary gingival hypertrophy
Correct Answer: She is on phenytoin to control seizures
Explanation:The patient’s symptoms are most likely due to phenytoin intake.Note:Hypertrichosis occurs in 5–12% of patients on phenytoin and is most prominent on the extremities. Other options:- Hypertrichosis is the excess hair growth, whereas hirsutism is the development of male-pattern-dependent hair growth, as seen in polycystic ovarian syndrome. – A Becker’s naevus is associated with localised hypertrichosis in the naevus. – Cyclosporine intake can typically lead to diffuse hair growth that begins within 2–4 weeks of starting the drug. – Hereditary gingival fibromatosis is associated with variable hypertrichosis occurring on the eyebrows, face, limbs and mid-back.
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This question is part of the following fields:
- Dermatology
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Question 17
Correct
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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: 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 18
Correct
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An abnormal red reflex is NOT a characteristic feature of which of the following ocular pathologies?
Your Answer: Amblyopia
Explanation:The red reflex examination is an important part of the paediatric ocular assessment. The red reflex is abnormal in conditions like retinoblastoma, retinopathy of prematurity, cataract, and retinal detachment. Amblyopia is a cortical developmental disorder that results in defective visual inputs to both the eyes. The disorder occurs during the cortical plasticity stage of embryonic development. The red reflex is normal in this case since there is no hindrance to the reflection of light from the ocular media and fundus.
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This question is part of the following fields:
- Ophthalmology
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Question 19
Correct
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Sensorineural deafness is strongly associated with which one of the following?
Your Answer: Rubella
Explanation:Primary rubella infection during pregnancy, particularly during the first trimester, can affect several organs and cause birth defects that are responsible for congenital rubella syndrome (CRS). The most common defects of CRS are hearing impairment (unilateral or bilateral sensorineural), eye defects (e.g., cataracts, congenital glaucoma, or pigmentary retinopathy), and cardiac defects (e.g., patent ductus arteriosus or peripheral pulmonic stenosis). Congenital hearing loss is the most common sequela, occurring in approximately 60% of cases, especially when infection occurs in the 4th month of pregnancy.
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This question is part of the following fields:
- Infectious Diseases
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Question 20
Correct
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A child presents with hypothyroidism. Which of the following features is characteristic of hypothyroidism?
Your Answer: Prolonged neonatal jaundice
Explanation:Congenital hypothyroidism is one of the most important diseases of the new-born, which may lead to mental and physical retardation when treatment is delayed or an appropriate dosage of thyroxine is not administered. The most alarming and earliest sign is jaundice, especially when it is prolonged, during the neonatal period.
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This question is part of the following fields:
- Endocrinology
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Question 21
Correct
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A 10-year-old boy was discharged from hospital after an episode of acute testicular pain.Considering he had an anatomical anomaly involving the processus vaginalis, what is the most probable diagnosis for this child?
Your Answer: Testicular torsion
Explanation:Based on the presented clinical scenario, the most probable diagnosis for the patient would be testicular torsion.Rationale:The gubernaculum is the structure responsible for aiding the descent of the testicles from the abdomen into the scrotum. The processus vaginalis precedes the descent of the testes and then undergoes closure. Abnormalities such as the persistence of a patent processus vaginalis, known as bell clapper deformity, predispose to testicular torsion.Other options:- Varicocele: Nutcracker syndrome occurs where the left renal vein becomes compressed in between the superior mesenteric artery and the aorta. Since the left gonadal vein drains into the left renal vein, this results in a varicocele. – Epididymitis and mumps orchitis are differentials for acute testicular pain but are not due to a defect in the processus vaginalis. – An incarcerated inguinal hernia presents mainly with signs of bowel obstruction which are not mentioned in the clinical scenario.The descent of testes:- Until the end of foetal life, the testicles are located within the abdominal cavity. – They are initially located on the posterior abdominal wall on a level with the upper lumbar vertebrae (L2). – Attached to the inferior aspect of the testis is the gubernaculum testis which extends caudally to the inguinal region, through the canal and down to the superficial skin. – It is interesting to note that both the testis and the gubernaculum are extra-peritoneal.- As the foetus grows, the gubernaculum becomes progressively shorter. It carries the peritoneum of the anterior abdominal wall (the processus vaginalis). As the processus vaginalis descends the testis is guided by the gubernaculum down the posterior abdominal wall and the back of the processus vaginalis into the scrotum.- By the third month of foetal life the testes are located in the iliac fossae, by the seventh they lie at the level of the deep inguinal ring.Usually, the processus vaginalis closes after birth but may persist predisposing to indirect hernias. On the other hand, a partial closure may result in the development of cysts on the cord.
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This question is part of the following fields:
- Nephro-urology
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Question 22
Correct
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A 16-year-old boy presents with poor development of secondary sex characteristics, colour blindness and a decreased sense of smell. On examination, his testes are located in the scrotum and are small and soft. What is the most likely diagnosis for this boy?
Your Answer: Kallmann’s syndrome
Explanation:Based on the clinical scenario, the most probable diagnosis in this patient is Kallmann’s syndrome.Kallmann’s syndrome is due to isolated gonadotrophin-releasing hormone (GnRH) deficiency. It is often inherited in an X-linked recessive manner. Other options:- While Klinefelter’s syndrome is also associated with hypogonadism, the other clinical features of Klinefelter’s are not seen. – Cryptorchidism is ruled out by the presence of testes in the scrotum. – The presentation of the child is not suggestive of mumps orchitis or hyperprolactinaemia.
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This question is part of the following fields:
- Endocrinology
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Question 23
Incorrect
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A 5 year old boy falls into the swimming pool whilst playing and almost drowns. His parents start BLS and transfer him to the emergency department. You attach him to the cardiac monitoring and you notice ventricular fibrillation. You immediately start on CRP algorithm for shockable rhythms. Which of the following may result in a poor defibrillation response?
Your Answer: Hypoxia
Correct Answer: Hypothermia
Explanation:Guidelines suggest that when hypothermia manifests in the context of a shockable rhythm, it might get harder to defibrillate. Therefore, defibrillation is recommended to occur at temperatures below 30°C, and to be limited in three shocks.
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This question is part of the following fields:
- Emergency Medicine
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Question 24
Correct
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Which of the following statements is correct regarding bone age?
Your Answer: Girl's growth plates close around age 13 to 15 years
Explanation:Bone age is a valuable tool for determining the skeletal maturation in children. An X-ray of the left hand and wrist or knee is used to calculate bone age, which is then compared with the chronological age of the subject to know if the bone age is advanced or delayed. Certain standardized methods are used to score skeletal maturity, the most common methods are the Tanner-Whitehouse (TW) and Greulich-Pyle (GP) methods. The growth plate comprises a resting zone, a proliferative zone, hypertrophic cartilage zone, calcified cartilage zone, and then the ossification zone. This is the zonal distribution from the epiphysis to the diaphysis. After the closure of growth plates, spinal growth still occurs to some extent, adding up to the final height. The growth plates in boys close at around 17 to 19 years of age, while in girls, they close at around 13 to 15 years.
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This question is part of the following fields:
- Endocrinology
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Question 25
Correct
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What is the most common presenting feature of Wilms tumour?
Your Answer: Abdominal mass
Explanation:The most common manifestation of Wilms tumour is an asymptomatic abdominal mass| an abdominal mass occurs in 80% of children at presentation. Abdominal pain or haematuria occurs in 25%. Urinary tract infection and varicocele are less common findings than these. Hypertension, gross haematuria, and fever are observed in 5-30% of patients. A few patients with haemorrhage into their tumour may present with hypotension, anaemia, and fever. Rarely, patients with advanced disease may present with respiratory symptoms related to lung metastases.
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This question is part of the following fields:
- Nephro-urology
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Question 26
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 27
Correct
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An 18 year old, previously well boy was admitted following a generalized tonic-clonic convulsion for 5 minutes with urinary incontinence and eye rolling. On examination, he was drowsy and had bilateral up going plantar reflexes. A short while ago he had been playing rugby and had taken a hit to the head. He was apparently normal for a few minutes before fitting. His blood sugar level was normal. Which of the following is the most probable reason for this presentation?
Your Answer: Post-traumatic seizure
Explanation:The history is suggestive of a post-traumatic seizure which frequently occurs after moderate or severe traumatic brain injury. Although upgoing plantars can be identified in a post-ictal status, an intracranial bleed has to be excluded. A single seizure cannot be considered epilepsy
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This question is part of the following fields:
- Neurology
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Question 28
Correct
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Withdrawal from which of the following substances is associated with hypersomnia, hyperphagia, irritability?
Your Answer: Amphetamine
Explanation:Drug withdrawal symptoms after a period of substance abuse can lead to a range of symptoms. Amphetamines are known to cause hypersomnia, hyperphagia, and irritability, as well as vivid dreams as a result of withdrawal. Similar symptoms are found in cocaine withdrawal. Alcohol withdrawal presents with symptoms such as insomnia, tremulousness and delirium. Ecstasy withdrawal includes irritation, mood swings, fatigue and insomnia. Heroin withdrawal presents with symptoms which include dilated pupils, insomnia, abdominal cramps and muscle aches. Withdrawal from prolonged cannabis use can cause depression, anxiety restlessness and insomnia.
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This question is part of the following fields:
- Adolescent Health
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Question 29
Correct
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A term baby with a birth weight of 4.5 kg with meconium aspiration syndrome is intubated and ventilated. Conventional ventilation was unsuccessful and so a trial of high-frequency oscillatory ventilation has commenced. Settings are mean airway pressure 14 cmH2O, delta P 25, rate 10 Hz, FiO2 1.0. Baby’s oxygen saturations are 84%. Blood gas shows pH 7.32, CO2 6.5 kPa, BE –4. Chest X-ray shows poorly inflated lungs.What is the first change that should be made to the ventilation?
Your Answer: Increase mean airway pressure
Explanation:The baby needs more oxygen saturation which could be attempted by increasing the mean airway pressureAfter initial resuscitation and stabilization, the following should be the ventilator settings used:Rate: 30-40/minutePeak inspiratory pressure (PIP) – determined by adequate chest wall movement.An infant weighing less than 1500 grams: 16-28 cm H2O.An infant weighing greater than 1500 grams: 20-30 cm H2O. Positive end expiratory pressure (PEEP): 4 cm of H2O OR 5-6 cm if FiO2 > 0.90.FiO2: 0.4 to 1.0, depending on the clinical situation.Inspiratory time: 0.3-0.5 sec.After 15 to 30 minutes, check arterial blood gases and pH.If the PaO2 or the O2 saturation is below accepted standards, the FiO2 can be raised to a maximum of 1.0. If the PaO2 or O2 saturation is still inadequate, the mean airway pressure can be raised by increasing either the PIP, PEEP, inspiratory time or the rate, leaving inspiratory time constant.If the PaCO2 is elevated, the rate or peak inspiratory pressure can be raised.
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This question is part of the following fields:
- Neonatology
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Question 30
Incorrect
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A 9-year-old boy presented with a history of sleep disturbance for the past year. According to the parents, he has episodes in the middle of the night where he sits up in bed, unresponsive, eyes wide open, arms outstretched, and thrashing. During these episodes, he usually looks frightened, will cry out, and then goes back to sleep again. The event lasts for 2–3 minutes and can occur up to three times a night. The following day, he is tired and falls asleep at school. What is the most appropriate next step to be taken for this patient?
Your Answer: Record overnight oxygen saturations
Correct Answer: Request an EEG
Explanation:The most appropriate next step would be to request for an EEG (electroencephalogram).The two primary differential diagnoses for the clinical scenario presented would be night terrors (hypnopompic hallucinations) due to underlying narcolepsy or frontal lobe epilepsy.Though occult airway obstruction and obstructive sleep apnoea can cause sleep disturbances, the clinical scenario presented is more suggestive of neurological disorders.The hyper-motor activity, along with arm posturing (often dystonic in appearance) and multiple occurrences per night would favour epilepsy. The daytime somnolence could be secondary to the nocturnal seizures.
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This question is part of the following fields:
- Neurology And Neurodisability
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