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Question 1
Correct
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The rotator cuff surrounds the shoulder joint and consists of the supraspinatus, infraspinatus, subscapularis and which one other muscle?
Your Answer: Teres minor
Explanation:The correct answer is the teres minor muscle. These group of muscles play an important role in protecting the shoulder joint and keeping the head of the humerus in the glenoid fossa of the scapula. This fossa is somehow shallow and needs support to allow for the full mobility that the shoulder joint has.
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This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 2
Incorrect
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A 4-year-old child was brought to a paediatrician for consult due to a palpable mass in his abdomen. The child has poor appetite and regularly complains of abdominal pain. The child was worked up and diagnosed with a tumour. What is the most likely diagnosis ?
Your Answer: Gastrointestinal Stromal Tumour
Correct Answer: Nephroblastoma
Explanation:Nephroblastoma is also known as Wilms’ tumour. It is a cancer of the kidneys that typically occurs in children. The median age of diagnose is approximately 3.5 years. With the current treatment, approximately 80-90% of children with Wilms’ tumour survive.
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This question is part of the following fields:
- Basic Sciences
- Pathology
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Question 3
Correct
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A man had an injury to his right brachial plexus. After examination by the doctor they found that the diaphragm and the scapula were unaffected however the patient could not abduct his arm. When helped with abducting his arm to 45 degrees he was able to continue the movement. This means that he was unable to initiate abduction. Where is the likely site of injury?
Your Answer: Suprascapular nerve
Explanation:The loss of ability to initiate abduction means paralysis of the supraspinatus muscle. This muscle is supplied by the supraclavicular nerve.
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This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 4
Correct
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When a young boy falls on his outstretched hand, he fractures one of the bones at his wrist joint. The doctors told his parents that the fractured bone has special importance as it is that bone that articulates with the distal end of the radius. Which one of the following is it?
Your Answer: Scaphoid
Explanation:It is the scaphoid bone that articulates with the radius at this level. It is located at the radial side of the wrist and is considered the largest bone in the proximal row of carpal bones. It articulates with the radius via its superior surface. This bone also articulates with trapezium and trapezoid bones via the inferior surface, capitate and lunate medially.
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This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 5
Correct
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A 22-year old man presented with a mass in his left scrotum which was more prominent when standing and felt like a 'bag of worms'. Examination revealed a non-tender mass along the spermatic cord. Also, the right testis was larger than the left testis. What is the likely diagnosis?
Your Answer: Varicocele
Explanation:Varicocele refers to dilatation and increased tortuosity of the pampiniform plexus – which is a network of veins found in spermatic cord that drain the testicle. Defective valves or extrinsic compression can result in outflow obstruction and cause dilatation near the testis. Normal diameter of the small vessels ranges from 0.5 – 1.5mm. A varicocele is a dilatation more than 2mm.
The plexus travels from the posterior aspect of testis into the inguinal canal with other structures forming the spermatic cord. They then form the testicular veins out of which the right testicular vein drains into the inferior vena cava and the left into the left renal vein.
It affects 15-20% men, and 40% of infertile males. Usually diagnosed in 15-25 years of age, they are rarely seen after 40 years of age. Because of the vertical path taken by the left testicular vein to drain into left renal vein, 98% idiopathic varicoceles occur on the left side. It is bilateral in 70% cases. Right-sided varicoceles are rare.
Symptoms include pain or heaviness in the testis, infertility, testicular atrophy, a palpable mass, which is non-tender and along the spermatic cord (resembling a ‘bag of worms’). The testis on the affected side might be smaller.
Diagnosis can be made by ultrasound. Provocative measures such as Valsalva manoeuvre or making the patient stand up to increase the dilatation by increasing the intra-abdominal venous pressure. -
This question is part of the following fields:
- Basic Sciences
- Pathology
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Question 6
Correct
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A woman with type II diabetes is undergoing a bilateral hernia repair as a day-case procedure under general anaesthetic. Which of the following is most appropriate?
Your Answer: They should be placed first on the operating list whenever possible
Explanation:Answer: They should be placed first on the operating list whenever possible
Patients with diet controlled diabetes are all
suitable for day case surgery if the procedure itself
is suitable for day surgery and all other criteria are
fulfilled.
People with diabetes controlled by oral or injected
medication are suitable for day case surgery if:
• They fulfil all day case criteria
• They can be first / early on a morning or afternoon
list.
Prioritise patients with diabetes on the list. This reduces the starvation time and hence the likelihood of the patient requiring a VRIII.Insulin should never be stopped in people with Type 1 diabetes because this will lead to ketoacidosis. If the starvation period is expected to require omission of more than one meal, a variable rate intravenous insulin infusion (VRIII) with concomitant glucose and electrolyte infusion will be required. Insulin requirements are increased by:
• Obesity
• Prolonged or major surgery
• Infection
• Glucocorticoid treatment.
When a VRIII is used, insulin and substrate should be infused continuously. If the infusion is stopped, there will be no insulin present in the circulation after 3-5 minutes leading to immediate catabolism. -
This question is part of the following fields:
- Peri-operative Care
- Principles Of Surgery-in-General
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Question 7
Incorrect
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The posterior boundary of the carotid triangle is bounded by which of the following muscles?
Your Answer: Posterior belly of the digastric
Correct Answer: Sternocleidomastoid
Explanation:The carotid triangle is a portion of the anterior triangle of the neck. It is bounded superiorly by the posterior belly of the digastric muscle, antero-inferiorly by the superior belly of omohyoid and posteriorly by the sternocleidomastoid. The floor is formed by the thyrohyoid, hyoglossus, middle and inferior pharyngeal constrictors and the roof is formed by the skin, superficial fascia, platysma and deep fascia.
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This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 8
Correct
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A 62-year-old male smoker, presented with shortness of breath, chronic cough and haemoptysis over the last three months. He has developed a fat pad in the base of his neck, rounded face, acne and osteoporosis. Which of the following is the most likely pulmonary disease that is causing these symptoms and findings?
Your Answer: Small-cell anaplastic carcinoma
Explanation:Small cell lung cancer is a highly aggressive form of lung cancer. It is thought to originate from neuroendocrine cells in the bronchus called Feyrter cells and is often associated to ectopic production of hormones like ADH and ACTH that result in paraneoplastic syndromes and Cushing’s syndrome.
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This question is part of the following fields:
- Basic Sciences
- Pathology
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Question 9
Correct
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Renin is secreted by pericytes in the vicinity of the afferent arterioles of the kidney from the juxtaglomerular cells. Plasma renin levels are decreased in patients with:
Your Answer: Primary aldosteronism
Explanation:Primary aldosteronism, also known as primary hyperaldosteronism or Conn’s syndrome, is excess production of the hormone aldosterone by the adrenal glands resulting in low renin levels. Most patients with primary aldosteronism (Conn’s syndrome) have an adrenal adenoma. The increased plasma aldosterone concentration leads to increased renal Na+ reabsorption, which results in plasma volume expansion. The increase in plasma volume suppresses renin release from the juxtaglomerular apparatus and these patients usually have low plasma renin levels. Salt restriction and upright posture decrease renal perfusion pressure and therefore increases renin release from the juxtaglomerular apparatus. Secondary aldosteronism is due to elevated renin levels and may be caused by heart failure or renal artery stenosis.
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This question is part of the following fields:
- Basic Sciences
- Physiology
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Question 10
Correct
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A middle-aged man undergoes an upper gastrointestinal endoscope for a benign oesophageal stricture. During the procedure, he suffers an iatrogenic perforation at the site. Imaging shows a contained leak and a small amount of surgical emphysema. Which of the following is the most appropriate nutritional option?
Your Answer: Total parenteral nutrition
Explanation:Iatrogenic perforation of the gastrointestinal tract
related to diagnostic or therapeutic endoscopy is
a rare but severe adverse event, associated with
significant morbidity and mortalityConservative treatment may be suitable for patients with limited oesophageal injury and contained leakage. Such patients include those suffering endoscopic iatrogenic perforation, as the patient is likely to be fasted and the diagnosis made promptly. They must remain nil by mouth, with appropriate antibiotic cover, and proton pump inhibitor therapy, total parenteral nutrition, and continued observation. Similarly, medical treatment might be suitable for cases of inoperable malignant stricture, that is, palliation.
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This question is part of the following fields:
- Generic Surgical Topics
- Upper Gastrointestinal Surgery
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Question 11
Correct
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A 1 week old baby boy is taken to the A&E department after a right sided groin swelling had been noticed. An examination is done and the testes are correctly located but there is a right sided inguinal hernia that is soft and easily reduced. Which of the following is the most appropriate management?
Your Answer: Surgery over the next few days
Explanation:Answer: Surgery over the next few days
Inguinal hernia is a type of ventral hernia that occurs when an intra-abdominal structure, such as bowel or omentum, protrudes through a defect in the abdominal wall. Inguinal hernias do not spontaneously heal and must be surgically repaired because of the ever-present risk of incarceration. Generally, a surgical consultation should be made at the time of diagnosis, and repair (on an elective basis) should be performed very soon after the diagnosis is confirmed.
The infant or child with an inguinal hernia generally presents with an obvious bulge at the internal or external ring or within the scrotum. The parents typically provide the history of a visible swelling or bulge, commonly intermittent, in the inguinoscrotal region in boys and inguinolabial region in girls.
The swelling may or may not be associated with any pain or discomfort. -
This question is part of the following fields:
- Generic Surgical Topics
- Paediatric Surgery
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Question 12
Correct
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A 64 year old diabetic man presents with a deep laceration of his lateral thigh which measures 3cm in depth by 7cm in length, that penetrates to the bone. There are no signs of fracture. His diabetes is diet controlled and is on low dose prednisolone therapy for polymyalgia rheumatica. Which of the following options should be employed most safely for the wound management of this patient?
Your Answer: Delayed primary closure
Explanation:Delayed primary closure is often intentionally applied to lacerations that are not considered clean enough for immediate primary closure. The wound is left open for 5-10 days; then, it is sutured closed to decrease the risk of wound infection. Improved blood flow at the wound edges, which develops increasingly over the first few days, is another benefit of this style of wound healing and can be associated with progressive increases in resistance to infections. The combination of diabetes and steroids makes wound complications more likely. Despite his high risk, a primary skin graft or flap is unlikely to be a safer option.
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This question is part of the following fields:
- Emergency Medicine And Management Of Trauma
- Principles Of Surgery-in-General
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Question 13
Correct
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Which of the following bones was most likely fractured following an injury in the medial side of the foot between the navicular behind and base of the first metatarsal in front?
Your Answer: First cuneiform
Explanation:The first cuneiform bone is the largest of the three cuneiforms. It is situated at the medial side of the foot, between the navicular behind and the base of the first metatarsal in front.
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This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 14
Correct
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A 32 year old woman presents to the ER with recurrent episodes of non specific abdominal pain. The labs including blood tests appear to be normal. Ct scan is done for further evaluation. The CT reveals a 1.5 cm nodule in the right adrenal gland that is associated with a lipid rich core. Urinary VMA is found to be within the normal range. Which of the following is the most likely diagnosis?
Your Answer: Benign non functional adenoma
Explanation:Adrenal adenomas are benign tumours of the adrenal glands, which can be either functioning or non-functioning. Though the majority are clinically silent, functional adenomas from the cortex of medulla can lead to overproduction of any of their associated hormones. Benign adenomas often have a lipid rich core that is readily identifiable on CT scanning. In addition the nodules are often well circumscribed.
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This question is part of the following fields:
- Breast And Endocrine Surgery
- Generic Surgical Topics
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Question 15
Correct
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A biopsy taken from the respiratory passage of a 37 year old male, chronic smoker will mostly likely show which cellular adaptation?
Your Answer: Stratified squamous metaplasia
Explanation:Metaplasia is a change in the cell type caused in part due to an extrinsic stress on the organ. It involves a change in the surface epithelium from one cell type to the another, most commonly squamous to columnar. This is a reversible process, and removal of the stress should theoretically reverse the surface epithelium back to normal morphology. Respiratory tract metaplasia is a classic example, in which the normal pseudostratified columnar epithelium is replaced by stratified squamous epithelium to better cope with the stress. Under continuous stress metaplasia can progress to dysplasia which is a disordered growth of cells eventually leading to the development of carcinoma.
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This question is part of the following fields:
- Basic Sciences
- Pathology
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Question 16
Correct
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Which of the following key features will be seen in an organ undergoing atrophy?
Your Answer: A greater number of autophagic vacuoles
Explanation:Atrophy is characterised by the breakdown of intracellular components along with organelles and packing them into vacuoles known as autophagic vacuoles. This is an adaptive response that separates the damaged cellular structures from the rest of the cells.
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This question is part of the following fields:
- Basic Sciences
- Pathology
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Question 17
Correct
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A surgeon ligates the left superior suprarenal artery whilst preforming a left adrenalectomy. Where does the left superior suprarenal artery originate?
Your Answer: Left inferior phrenic artery
Explanation:The superior suprarenal arteries arises from the inferior phrenic artery on either side.
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This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 18
Correct
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A 14 year old girl suffers from haemophilia A and chronic knee pain with progressive swelling and deformity over the last 4 years. Test results reveal a significantly reduced factor VIII activity. Which of the following is seen in the knee joint space after an acute painful episode?
Your Answer: Cholesterol crystals
Explanation:Due to breakdown of the red blood cell membrane in haemophilic patients, cholesterol crystals are formed by the lipids. On the other hand lipofuscin deposition does not occur in haemolysis or haemorrhage. Neutrophil accumulation suggests acute inflammation. Anthracotic pigment is an exogenous carbon pigment that deposits in the lung from dust. Russell bodies are intracellular accumulations of immunoglobins in plasma cells. Curschmann’s spirals and Charcot Leyden crystals are pathognomonic of asthma.
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This question is part of the following fields:
- Basic Sciences
- Pathology
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Question 19
Correct
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During a laparoscopic inguinal hernia repair, the surgeon finds an artery in the extraperitoneal connective tissue (preperitoneal fat) that courses vertically and just medial to the bowel as the bowel passes through the abdominal wall. Which artery is this?
Your Answer: Inferior epigastric
Explanation:The inferior epigastric artery comes from the external iliac artery just above the inguinal ligament to curve forward in the subperitoneal tissue and then ascend obliquely along the medial margin of the deep inguinal ring. It continues to ascend between the rectus abdominis and the posterior lamella of its sheath after piercing the fascia transversalis and passing anterior to the linea semicircularis. Finally it gives off numerous branches that anastomose above the umbilicus with the superior epigastric branch of the internal mammary artery and with the lower intercostal arteries. As this artery ascends obliquely upwards from its origin it lies along the lower medial margins of the deep inguinal ring and posterior to the start of the spermatic cord. It is found in the preperitoneal fat of the abdomen lying just superficial to the peritoneum and forms the lateral umbilical fold. Hernias that pass lateral to this are indirect and medial to this, direct hernias.
The deep circumflex artery travels along the iliac crest on the inner surface of the abdominal wall. It is very lateral to the abdominal wall and hernias would pass medial to it.
The superficial circumflex iliac, superficial epigastric, superficial external pudendal arteries are all superficial arteries found in the superficial fascia. -
This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 20
Incorrect
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A 27-year-old woman has chronic low serum calcium levels. Which of the following conditions may be responsible for the hypocalcaemia in this patient?
Your Answer: Primary hyperparathyroidism
Correct Answer: Hypoparathyroidism
Explanation:Chronic hypocalcaemia is mostly seen in patients with hypoparathyroidism as a result of accidental removal or damage to parathyroid glands during thyroidectomy.
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This question is part of the following fields:
- Basic Sciences
- Pathology
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Question 21
Correct
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The thyroid gland is a large ductless gland located in which part of the neck?
Your Answer: Visceral space
Explanation:The thyroid gland is an endocrine gland in the neck, consisting of two lobes connected by an isthmus. It is situated at the front and sides of the neck in the visceral space.
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This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 22
Incorrect
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When a penile tumour invades the subepithelial connective tissue of the penis, what is its stage?
Your Answer: T2
Correct Answer: T1
Explanation:The TNM staging used for penile cancer is as follows:
TX: primary tumour cannot be assessed
T0: primary tumour is not evident
Tis: carcinoma in situ is present
Ta: non-invasive verrucous carcinoma is present
T1: tumour is invading subepithelial connective tissue
T2: tumour is invading the corpora spongiosum or cavernosum
T3: tumour invading the urethra or prostate
T4: tumour invading other adjacent structures.
In this case, the patient has a T1 tumour. -
This question is part of the following fields:
- Basic Sciences
- Pathology
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Question 23
Correct
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A 30 year-old male patient sustained a sharp blow to the right side of the head, over the temporal region during a vehicular accident. This resulted to the rupture of the principal artery that supplies the meninges. Which artery is affected?
Your Answer: Middle meningeal artery
Explanation:The middle meningeal artery is typically the third branch of the first part of the maxillary artery, one of the two terminal branches of the external carotid artery. After branching off the maxillary artery in the infratemporal fossa, it runs through the foramen spinosum to supply the dura mater and the calvaria. The middle meningeal artery is the largest of the three (paired) arteries that supply the meninges, the others being the anterior meningeal artery and the posterior meningeal artery. The anterior branch of the middle meningeal artery runs beneath the pterion. It is vulnerable to injury at this point, where the skull is thin. Rupture of the artery may give rise to an epidural hematoma .An injured middle meningeal artery is the most common cause of an epidural hematoma.
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This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 24
Correct
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A 35 year-old man presents with high grade fever for 7 days after returning from a trip to India. He tested positive for widal test. What is the most likely organism that caused his fever?
Your Answer: Salmonella typhi
Explanation:Typhoid fever is caused by virulent bacteria called Salmonella typhi. Salmonella typhi spread through contaminated food or water and occasionally through direct contact with someone who is infected.
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This question is part of the following fields:
- Basic Sciences
- Pathology
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Question 25
Correct
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Pain in the right upper quadrant of the abdomen on ingestion of a fatty meal is seen in a condition which involves which of the following substances?
Your Answer: Cholecystokinin
Explanation:The clinical scenario described here favours the presence of gallstones. During food ingestion, vagal discharges stimulate gallbladder contraction. Moreover, presence of fat and amino acids in the intestinal lumen stimulates the release of cholecystokinin (CCK) in the duodenum. This causes sustained gallbladder contraction and relaxation of the sphincter of Oddi. If gallstones are present, there will be inflammation in the gallbladder and CCK will aggravate it due to contractions.
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This question is part of the following fields:
- Basic Sciences
- Physiology
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Question 26
Correct
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Cyclophosphamide is used as a chemotherapy and immunosuppressant agent and is indicated in various diseases. One of the most severe complications of its use is cancer of the:
Your Answer: Urinary bladder
Explanation:Cyclophosphamide is used to treat various types of cancer and autoimmune disorders. The main use of cyclophosphamide is in combination with other chemotherapy agents in the treatment of lymphomas, some forms of leukaemia and some solid tumours. Side-effects include nausea and vomiting, bone marrow suppression, stomach ache, diarrhoea, darkening of the skin
ails, alopecia, lethargy, and haemorrhagic cystitis. Cyclophosphamide is itself carcinogenic, potentially causing transitional cell carcinoma of the bladder as a long-term complication. -
This question is part of the following fields:
- Basic Sciences
- Pathology
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Question 27
Correct
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A 25-year-old woman is undergoing an appendicectomy for perforated appendicitis. What is the single most important modality for reducing the risks of postoperative wound infection?
Your Answer: Perioperative administration of antibiotics
Explanation:Perioperative administration of antibiotics is very important for reducing the risks of postoperative wound infection. Clips make infections easier to manage but do not reduce the risks. Drains have no effect on the skin wounds in these cases.
Surgical site infections (SSI) comprise up to 20% of all healthcare-associated infections and at least 5% of patients undergoing surgery will develop an SSI as a result. SSIs may occur following a breach in tissue surfaces and allow normal commensals and other pathogens to initiate infection. The organisms are mostly derived from the patient’s own body.
SSIs are a major cause of morbidity and mortality.
Some preoperative measures that may increase the risk of SSI include:
1. Shaving the wound using a razor (disposable clipper preferred)
2. Tissue hypoxia
3. Delayed administration of prophylactic antibiotics in tourniquet surgerySSIs can be prevented by taking certain precautionary steps pre-, intra-, and postoperatively.
1. Preoperatively:
a. Do not remove body hair routinely
b. If hair needs removal, use electrical clippers (razors increase the risk of infection)
c. Antibiotic prophylaxis if:
– placement of prosthesis or valve
– clean-contaminated surgery
– contaminated surgery2. Intraoperatively:
a. Prepare the skin with alcoholic chlorhexidine (Lowest incidence of SSI)
b. Cover surgical site with dressing3. Postoperatively:
a. Prevention of incisional infection by appropriate cleansing, skin care, and moisture management
b.Tissue viability advice for management of surgical wound healing by secondary intention -
This question is part of the following fields:
- Principles Of Surgery-in-General
- Surgical Technique And Technology
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Question 28
Correct
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A 5 year old boy is taken to the doctor with symptoms of dysuria and frequency in urination. Blood and nitrites are shown positive on urine dipstick. A urinary tract infection is suspected. Which follow up strategy is the most appropriate?
Your Answer: Watchful waiting
Explanation:In a child 3 months to 12 years of age who is afebrile and well-appearing, it is reasonable to consider withholding empiric treatment if urine analysis (UA) is mildly positive or equivocal e.g.: leukocyte esterase (LE0 only, low WBC count) while awaiting culture results. Conversely, if the history is very consistent with UTI and positive UA, start treatment empirically.
Positive leukocyte esterase: very sensitive, but less specific for true infection (false positives are common)
Note: if no WBC on microscopy, more likely to be a false positive
Positive nitrite: high specificity for UTI, but lower sensitivity i.e. positive nitrite means likely UTI, but negative nitrite does not rule out UTICan also see positive nitrite in contaminated specimen if left at room temperature for too long
• Positive blood and protein: not specific for UTI
• Microscopy:>10 WBC/mm3 is suggestive of UTIManagement
– A single isolated UTI (in girls) may be managed expectantly.
– > 2 UTI’s (or 1 in males) in a 6 month period should prompt further testing.
– Voiding cystourethrograms show the greatest anatomical detail and is the ideal first line test in males; isotope cystography has a lower radiation dose and is the first line test in girls.
– USS should also be performed.
– Renal cortical scintigraphy should be performed when renal scarring is suspected. -
This question is part of the following fields:
- Generic Surgical Topics
- Paediatric Surgery
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Question 29
Correct
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Diffusion is the movement of molecules from a region of high concentration to a region of low concentration. Which of these changes will decrease the rate of diffusion of a substance?
Your Answer: An increase in the molecular weight of the substance
Explanation:Unless given IV, a drug must cross several semipermeable cell membranes before it reaches the systemic circulation. Drugs may cross cell membranes by diffusion, amongst other mechanisms. The rate of diffusion of a substance is proportional to the difference in the concentration of the diffusing substance between the two sides of the membrane, the temperature of the solution, the permeability of the membrane and, in the case of ions, the electrical potential difference between the two sides of the membrane.
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This question is part of the following fields:
- Basic Sciences
- Physiology
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Question 30
Correct
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A 66 year old retired judge has recently undergone a wide local excision and sentinel lymph node biopsy for breast cancer. Which of the factors listed below will provide the most important prognostic information?
Your Answer: Nodal status
Explanation:Even in the era of gene-expression profiling, the nodal status still remains the primary prognostic discriminant in breast cancer patients. The exclusion of node involvement using non-invasive methods could reduce the rate of axillary surgery, thereby preventing from suffering complications.
Lymph node status is highly related to prognosis (chances for survival).
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This question is part of the following fields:
- Breast And Endocrine Surgery
- Generic Surgical Topics
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SESSION STATS - PERFORMANCE PER SPECIALTY
