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Question 1
Incorrect
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Which of the following does the inferior mesenteric artery supply?
Your Answer: From the duodenum to the first two thirds of the transverse colon
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 2
Incorrect
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A 17-year-old girl is brought to the ER after collapsing at a party. Her friends state that she complained about palpitations prior to collapsing. On further history, it is revealed that she recently visited the dermatologist and was given an antibiotic prescription for an infected toe. She is reported to be allergic to penicillin. Her mother died of a sudden cardiac event when the girl was just 3 years old. An uncle and aunt also passed away suddenly at a young age. ECG shows sinus rhythm and a corrected QT interval of 550 ms. Which of the following most likely lead to the collapse in this young girl?
Your Answer: Wolff Parkinson White type A
Correct Answer: Congenital long QT syndrome
Explanation:Congenital LQTS arises from mutations in genes that code for ion channels within myocytes.These mutations all cause ventricular action potentials to be prolonged, resulting in a lengthened QT interval on ECG. The congenital long-QT syndrome (LQTS) is a life-threatening cardiac arrhythmia syndrome that represents a leading cause of sudden death in the young. LQTS is typically characterized by a prolongation of the QT interval on the ECG and by the occurrence of syncope or cardiac arrest, mainly precipitated by emotional or physical stress.LQTS type 1Most common type of congenital LQTSDefect: loss of function mutation on the KCNQ1 gene located on chromosome 11p → defective slow delayed rectifier voltage-gated potassium channelSubtypesJervell and Lange-Nielsen syndrome Associated with congenital deafnessAutosomal recessiveAssociated with ventricular tachyarrhythmiasRomano-Ward syndrome No associated deafnessAutosomal dominantAssociated with ventricular tachyarrhythmias
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This question is part of the following fields:
- Cardiovascular
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Question 3
Incorrect
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A term infant delivered via C-section develops tachypnoea, grunting, flaring, and intercostal retractions 10 minutes after birth. A chest radiograph reveals well-aerated lungs with fluid in the fissure on the right, prominent pulmonary vascular markings, and flattening of the diaphragm. His oxygen saturation is 90%. He improves within a few hours and requires no oxygen. What condition is this infant most likely suffering from?
Your Answer: Pulmonary oedema
Correct Answer: Transient tachypnoea of the new-born
Explanation:Transient tachypnoea of the new-born is a condition associated with the delayed clearance of amniotic fluid from the new-born. The X-ray findings are typical of this condition. As the name implies and was noted in this patient, it is not a lasting condition and resolves within 24-72 hours after birth. The differential diagnoses usually present with different chest X-ray findings:- Aspiration pneumonia shows infiltrates in the lower lobes of the lungs- Congenitally acquired pneumonia shows patchy, asymmetrical densities- Meconium aspiration shows hyperinflation and patchy asymmetric airspace disease- Pulmonary oedema shows cephalization of pulmonary veins and indistinctness of the vascular margins.
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This question is part of the following fields:
- Respiratory
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Question 4
Incorrect
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What is the most important investigation to perform in a 2-week-old new-born baby boy who is well feed and thriving, but jaundiced?
Your Answer: LFTs
Correct Answer: Total serum bilirubin
Explanation:Usually, a total serum bilirubin level test is the only one required in an infant with moderate jaundice who presents on the second or third day of life without a history and physical findings suggestive of a pathologic process. Measurement of bilirubin fractions (conjugated vs unconjugated) in serum is not usually required in infants who present as described above. However, in infants who have hepatosplenomegaly, petechiae, thrombocytopenia, or other findings suggestive of hepatobiliary disease, metabolic disorder, or congenital infection, early measurement of bilirubin fractions is suggested. The same may apply to infants who remain jaundiced beyond the first 7-10 days of life, and to infants whose total serum bilirubin levels repeatedly rebound following treatment.
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This question is part of the following fields:
- Neonatology
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Question 5
Incorrect
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Which of the following does not occur in a 15-year-old girl who presents following amitriptyline overdose?
Your Answer: Respiratory depression
Correct Answer: Pin point pupils
Explanation:Pupils are dilated in patients with amitriptyline overdose.Tricyclic antidepressants have a narrow therapeutic index, and thus, small doses can be fatal in children. Deaths from tricyclics are more common than other antidepressants. Bimodal incidence with toddlers (accidental) and teenagers (deliberate) most commonly affected.Symptoms: They occur within 6 hours of ingestion.- Nausea, vomiting, and headache- Elevated body temperature- Agitation, sleepiness, confusion, coma- Dry mouth, blurred vision, urinary retention (anticholinergic)- Dilated pupils- Seizures- Hypotension, tachycardia, conduction disorders, and cardiac arrest- Respiratory depressionManagement:Treatment focuses on supportive care. This includes airway protection, ventilation and oxygenation, intravenous fluids, and cardiac monitoring.Other measures include:- Activated charcoal within 2 hours- Hypotension is treated with IV fluids and adrenaline- Cardiac monitoring- Sodium bicarbonate in acidosis or if there are wide QRS complex (> 100 ms)- Convulsions may require diazepam or lorazepam.
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This question is part of the following fields:
- Emergency Medicine
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Question 6
Incorrect
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A 16-year-old girl is brought to the emergency by her parents who report that she has had multiple collapsing episodes over the past week. Each time she would collapse with the eyes shut and regain consciousness after 2 to 5 min with general weakness. The collapse is not followed by a post ictal state. The patient feels well and normal between these episodes. Which of the following is the most likely diagnosis?
Your Answer: Atonic seizure
Correct Answer: Vasovagal syncope
Explanation:A vasovagal episode or vasovagal syncope is the most common form of reflex syncope. Reflex syncope is a general term used to describe types of syncope resulting from a failure in autoregulation of blood pressure, and ultimately, in cerebral perfusion pressure resulting in transient loss of consciousness. The mechanisms responsible for this are complex and involve both depression of cardiac output as well as a decrease in vascular tone. Other types of reflex syncope include carotid sinus syncope and situational syncope, for instance, cough or micturition syncope. Vasovagal syncope may be triggered by pain or emotional upset, although frequently a specific trigger cannot be identified.
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This question is part of the following fields:
- Neurology And Neurodisability
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Question 7
Correct
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A 2-year-old baby sustained a wound to her hand whilst playing in the garden. She is unvaccinated as the parents are concerned regarding side effects. There is no contraindication to vaccinations. What is the most appropriate action?
Your Answer: Give complete DPT vaccine course
Explanation:A complete course of DPT should be given.
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This question is part of the following fields:
- Immunology
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Question 8
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 9
Incorrect
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A 14-year-old female is brought to the paediatrician with recent onset of generalized tonic clonic seizures and reports 4 episodes in 2 weeks. Her teacher has reported that her attention span has deteriorated markedly which has affected her performance in studies. She often stops in the middle of tasks and forgets what she is doing. After discussing with the mother and the patient you decide to start medication. While speaking alone, the patient tells you that she is sexually active with her boyfriend and takes POPs (progestin only pills) but sometimes forgets to take them. which of the following anti-epileptic drug can be safely initiated in this patient?
Your Answer: Oxcarbazepine
Correct Answer: Lamotrigine
Explanation:Lamotrigine does not significantly increase risk of birth defects during pregnancy.
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This question is part of the following fields:
- Neurology And Neurodisability
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Question 10
Incorrect
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A 16 year old patient was admitted with walking difficulties and knee pain. Upon examination, his leg is externally rotated and is 2cm shorter. His ability to flex, abduct and medially rotate his leg is limited and when he flexes his hip, external rotation is increased. What is the most probable diagnosis?
Your Answer: Transient synovitis of the hip
Correct Answer: Slipped femoral epiphysis
Explanation:The clinical presentation is typical of a slipped femoral epiphysis, which refers to a fracture through the growth plate (physis), resulting in slippage of the overlying end of the femur. It is the most common hip disorder in adolescence. SCFEs usually cause groin pain on the affected side, but sometimes cause knee or thigh pain. The range of motion in the hip is restricted in internal (medial) rotation, abduction, and flexion.
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This question is part of the following fields:
- Musculoskeletal
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Question 11
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: Legionellosis
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 12
Incorrect
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An 11-week-old baby with abnormal facies presented to the paediatric clinic with recurrent chest infections. CXR showed an absent thymic shadow. What is the most likely diagnosis?
Your Answer: Fragile X syndrome
Correct Answer: DiGeorge syndrome
Explanation:DiGeorge syndrome usually presents at a young age with abnormal faces. Chest x-ray is characterised by an absent thymic shadow and recurrent infections due to an abnormal T-cell mediated immune response. Sometimes it presents by convulsions of the new-born due to hypocalcaemia as a result of a malfunctioning parathyroid gland and low levels of PTH.
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This question is part of the following fields:
- Genetics And Dysmorphology
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Question 13
Incorrect
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What is most likely to occur in lead poisoning?
Your Answer: Osteomalacia
Correct Answer: Delayed developmental milestones
Explanation:Lead can be found in material used for mining, leaded paints and gasoline, glassware, toys, and even cosmetics. Lead poisoning is rare nowadays as the use of lead has been banned from many products. Lead is toxic and in certain concentrations can cause irreversible damage. Children are especially vulnerable as they absorb 4 times as much ingested lead as adults. The typical features of lead poisoning include developmental delay and behavioural disorders, microcytic anaemia, constipation and vomiting. Pulmonary fibrosis, Osteomalacia and cardiomyopathy are not known features of lead poisoning.
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This question is part of the following fields:
- Haematology And Oncology
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Question 14
Correct
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A child presents with lymphoedema. Clinical examination reveals she has widely spaced nipples and a systolic murmur. Her femoral pulses are absent. Her mother admits she did not have any scans during gestation. What is the most probable diagnosis?
Your Answer: Turner syndrome
Explanation:Turner syndrome is a genetic disease that affects females. It presents with wide-spread nipples, low hairline, lymphoedema, short 4th metacarpals, high-arched palate, cardiac problems, and horseshoe kidneys.
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This question is part of the following fields:
- Neonatology
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Question 15
Incorrect
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The blood supply to which of the following structures is NOT compromised due to an occlusion in the anterior cerebral artery?
Your Answer: Medial surface of the frontal lobe
Correct Answer: Brocas area
Explanation:Broca’s area is usually supplied by branches from the middle cerebral artery and thus will be spared when the anterior cerebral artery is occluded.Note:The two internal carotid arteries and two vertebral arteries form an anastomosis known as the Circle of Willis on the inferior surface of the brain. Each half of the circle is formed by:1. Anterior communicating artery2. Anterior cerebral artery3. Internal carotid artery4. Posterior communicating artery5. Posterior cerebral arteries and the termination of the basilar arteryThe circle and its branches supply the corpus striatum, internal capsule, diencephalon and midbrain.
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This question is part of the following fields:
- Neurology And Neurodisability
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Question 16
Incorrect
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A 7-month-old baby appears to have experienced a fit. The parents noticed jerking of one arm followed by generalised shaking. A flat erythematous lesion under the right lower eyelid, which has not changed in size or appearance, has been present since birth.What is the most likely diagnosis?
Your Answer: Type 1 neurofibromatosis
Correct Answer: Sturge–Weber syndrome
Explanation:Sturge-Weber syndrome (SWS), also called encephalotrigeminal angiomatosis, is a neurocutaneous disorder with angiomas that involve the leptomeninges (leptomeningeal angiomas [LAs]) and the skin of the face, typically in the ophthalmic (V1) and maxillary (V2) distributions of the trigeminal nerve. The hallmark of SWS is a facial cutaneous venous dilation, also referred to as a nevus flammeus or port-wine stain (PWS).Signs and symptoms:SWS is generally diagnosed clinically, based on the typical cutaneous, central nervous system (CNS), and ocular abnormalities associated with it.Neurological signs include the following:Developmental delay/intellectual disabilityLearning problemsAttention deficit-hyperactivity disorderInitial focal seizures progressing to frequent, secondarily generalized seizuresIncreasing seizure frequency and duration despite the use of antiepileptic drugs (AEDs)Increasing duration of a transient postictal deficitIncrease in focal or diffuse atrophy – Determined by serial neuroimagingProgressive increase in calcificationsDevelopment of hemiparesisDeterioration in cognitive functioningPhysical signs of SWS are as follows:Port-wine stainMacrocephalyOcular manifestationsSoft-tissue hypertrophyHemiparesisVisual lossHemianopsiaOcular involvement in SWS may include the following signs:BuphthalmosGlaucomaTomato-catsup colour of the fundus (ipsilateral to the nevus flammeus) with glaucomaConjunctival and episcleral haemangiomasDiffuse choroidal haemangiomasHeterochromia of the iridesTortuous retinal vessels with occasional arteriovenous communications
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This question is part of the following fields:
- Dermatology
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Question 17
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: 24 hour ECG
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 18
Incorrect
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A 10-year-old girl presents with hyperkeratotic plaques on the extensor aspects of the skin and the scalp margin. A skin scraping KOH mount and fungal culture in Sabouraud Dextrose Agar from the skin and hair revealed no growth.What is the most probable diagnosis for this patient?
Your Answer: Seborrhoeic dermatitis
Correct Answer: Psoriasis
Explanation:The most probable diagnosis for this patient’s symptoms is psoriasis. Psoriasis:Chronic plaque psoriasis is characterised by pinkish-red hyperkeratotic plaques, which occur mainly on extensor surfaces such as knees and elbows. The lower back, ears and scalp can also be involved. Koebner phenomenon: Psoriasis typically exhibits this phenomenon where new plaques of psoriasis occur particularly at sites of skin trauma. Diagnosis:Skin biopsy of psoriatic plaques reveals acanthosis and parakeratosis, reflecting increased skin turnover. Capillary dilatation within the dermis also occurs, surrounded by a mixed neutrophilic and lymphohistiocytic perivascular infiltrate.
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This question is part of the following fields:
- Dermatology
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Question 19
Incorrect
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What is the primary reason for a written protocol?
Your Answer:
Correct Answer: Document the process of the trial in advance
Explanation:A written protocol is important in clinical research as it helps to decrease bias with early findings as the process of the trial has been documented in advance. To show that the study has been properly undertaken before commencing, the investigators must document their names| they must describe the process, detail the analysis that will be undertaken, and provide a power calculation. The ethics committee does not always need to see the protocol.
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This question is part of the following fields:
- Epidemiology And Statistics
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Question 20
Incorrect
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When assessing language development, which of the following is typical of a 2 1/2-year-old child?
Your Answer:
Correct Answer: Ask 'where' questions
Explanation:Language/Communication milestones of 2 years old:Points to things or pictures when they are named Knows names of familiar people and body parts Says sentences with 2 to 4 words Follows simple instructions Repeats words overheard in conversation Points to things in a book
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This question is part of the following fields:
- Child Development
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