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Question 1
Incorrect
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A victim of mob justice was brought to the A & E with a stab wound in the anterior chest 2 cm lateral to the left sternal border. He underwent an emergency thoracotomy that revealed clots in the pericardium, with a puncture wound in the right ventricle. To evacuate the clots from the pericardial cavity the surgeon slipped his hand behind the heart at its apex. He extended his finger upwards until its tip was stopped by a line of pericardial reflection which forms the:
Your Answer: Transverse pericardial sinus
Correct Answer: Oblique pericardial sinus
Explanation:Transverse sinus: part of pericardial cavity that is behind the aorta and pulmonary trunk and in front of the superior vena cava separating the outflow vessels from the inflow vessels.
Oblique pericardial sinus: is behind the left atrium where the visceral pericardium reflects onto the pulmonary veins and the inferior vena cava. Sliding a finger under the heart will take you to this space.
Cardiac notch: indentation of the ‘of the heart’ on the superior lobe of the left lung.
Hilar reflection: the reflection of the pleura onto the root of the lung to continue as mediastinal pleura.
Costomediastinal recess: part of the pleural sac where the costal pleura transitions to become the mediastinal pleura.
Sulcus terminalis: a groove between the right atrium and the vena cava -
This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 2
Incorrect
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A 46 -year old patient diagnosed with chronic rhinosinusitis, was to undergo surgery to improve drainage from his frontal sinus to the nose. Which is a route that one would take to enter into the frontal sinus through the nasal cavity?
Your Answer: Superior meatus
Correct Answer: Middle meatus
Explanation:The middle meatus is a nasal passageway located inferior to the middle concha and superior to the inferior concha. On the superior aspect of this meatus is a bulge produced by the middle ethmoidal cells known as the bulla ethmoidalis. Below this bulge is a curved fissure, the hiatus semilunaris, which is also bordered inferiorly by the edge of the uncinate process of the ethmoid. It is through this curved fissure, hiatus semilunaris, that the middle meatus communicates with the frontal sinus. It first forms a communication with a curved passage way known as the infundibulum. The infundibulum anteriorly communicates with the anterior ethmoidal cells and continues upward as the frontonasal duct into the frontal sinus.
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This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 3
Correct
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A 20 year lady is brought to the A&E following a road accident. She is hypotensive and a CT scan of the abdomen reveals a shattered spleen. An emergency splenectomy is performed where the splenic artery is ligated right at its origin. Which of the following arteries will have a diminished blood flow owing to ligation of the splenic artery at its origin?
Your Answer: Left gastroepiploic
Explanation:Ligation of the splenic artery right at its point of origin should cut off blood flow in its branches. The following are the branches of the splenic artery: pancreatic branches, short gastric branches and left gastroepiploic arteries.
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This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 4
Incorrect
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The occipital artery is accompanied by which nerve as it arises from the external carotid artery?
Your Answer: Auriculotemporal branch of the trigeminal nerve (CN V3)
Correct Answer: Hypoglossal nerve (CN XII)
Explanation:Three main types of variations in the relations of the occipital artery and the hypoglossal nerve are found according to the level at which the nerve crosses the external carotid artery and the point of origin of the occipital artery. In Type I, the hypoglossal nerve crosses the external carotid artery inferior to the origin of the occipital artery; in Type II, the nerve crosses the external carotid artery at the level of origin of the occipital artery; and in Type III, it crosses superior to that level. In Type III the occipital artery makes a loop around the hypoglossal nerve and is in a position to pull and exert pressure on the nerve. This possibility should be taken into consideration in the diagnosis of peripheral paresis or paralysis of the tongue and during surgery in this area.
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This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 5
Incorrect
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A 45-year old male, who was a chronic smoker presented to the clinic with backache and dry, incessant cough. On examination, he was found to have raised blood pressure, purplish striae on his abdomen, truncal obesity and tenderness over the lower thoracic spine. These findings are suggestive of which condition?
Your Answer: Extra-adrenal paraganglioma
Correct Answer: Small-cell anaplastic (oat cell) carcinoma
Explanation:The symptoms suggest Cushing syndrome due to increased glucocorticoid levels. One cause of Cushing syndrome is ectopic production of adrenocorticotrophic hormone from oat cell carcinoma. As oat cell carcinoma is known to be highly metastatic, the tenderness in lower back could represent metastatic involvement.
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This question is part of the following fields:
- Basic Sciences
- Pathology
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Question 6
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 7
Correct
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An episiotomy is indicated for a woman during a difficult vaginal delivery. Whilst the registrar was performing this procedure she made a median cut too far through the perineal body cutting the structure immediately posterior. Which structure is this?
Your Answer: External anal sphincter
Explanation:An episiotomy is an incision that is made whenever there is a risk of a tear during vaginal deliver. A posterolateral incision, as opposed to a median incision is preferred. Of the options given, the external anal sphincter lies right posterior to the perineal body. The sacrospinous and the sacrotuberous ligaments are deep in the perineum that they should not be involved in this.
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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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The cranial nerves of the brain provide motor and sensory innervation to the structures of the head and neck. Which of the following cranial nerves provide only motor innervation?
Your Answer: Abducens
Explanation:The cranial nerves emerge directly from the brain and the brain stem. They provide sensory, motor or both motor and sensory innervation. Here is a summary of the cranial nerves and their function:
Olfactory – Purely sensory
Optic – Sensory
Oculomotor – Mainly motor
Trochlear – Motor
Trigeminal – Both sensory and motor
Abducens – Mainly motor
Facial – Both sensory and motor
vestibulocochlear – Mostly sensory
Glossopharyngeal – Both sensory and motor
Vagus – Both sensory and motor
Accessory – Mainly motor
Hypoglossal – Mainly motor -
This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 9
Correct
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In the human body, veins often run a course parallel to the artery that has the same name. Which of the following listed veins doesn't run parallel to the artery of the same name?
Your Answer: Inferior mesenteric
Explanation:The inferior mesenteric artery and inferior mesenteric vein don’t run in tandem because the vein is part of the portal venous system-draining into the splenic vein which drains into the hepatic portal vein. The inferior mesenteric artery is a branch of the descending aorta at the level of L3. The inferior mesenteric vein and artery, however, drain the same region i.e. the descending and sigmoid colon and rectum.
Superior epigastric vessels course together and are the continuation of the internal thoracic artery and vein.
Superficial circumflex iliac vessels course together in the superficial fat of the abdominal wall.
Superior rectal vessels are the terminal ends of the inferior mesenteric vessels, located on the posterior surface of the rectum.
The ileocolic artery and vein are branches off the superior mesenteric vessels. Both course in the mesentery, supplying/draining the caecum, appendix, terminal portion of the ileum. The inferior epigastric vessels run together. -
This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 10
Incorrect
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Below which level of the spinal cord will the inferior gluteal nerve be unaffected?
Your Answer: S2
Correct Answer: S3
Explanation:The inferior gluteal nerve arises from the dorsal divisions of the fifth lumbar and first and second sacral nerves. According to this fact any lesion at or below the S3 will not affect the inferior gluteal nerve.
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This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 11
Incorrect
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A cancer patient was found to have a radio resistant tumour. Which tumour does the patient most likely have?
Your Answer: Lymphoma
Correct Answer: Liposarcoma
Explanation:Liposarcoma is a cancer that arises in fat cells in deep soft tissue. Commonly it occurs inside the thigh or retroperitoneum. It usually affects middle-aged and older adults, over 40 years. Liposarcoma is the most common soft-tissue sarcoma. It is very radio resistant. Five-year survival rates vary from 100% to 56% based on histological subtype.
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This question is part of the following fields:
- Basic Sciences
- Pathology
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Question 12
Correct
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A 56-year-old male is admitted for an elective hip replacement. Three days postoperatively you suspect he has had a pulmonary embolism. He has no past medical history of note. Blood pressure is 120/80 mmHg with a pulse of 90/min. The chest x-ray is normal. Following treatment with low-molecular-weight heparin, what is the most appropriate initial lung imaging investigation to perform?
Your Answer: Computed tomographic pulmonary angiography
Explanation:According to the ECS Guidelines 2019, Multidetector Computed tomographic pulmonary angiography (CTPA) is the method of choice for imaging the pulmonary vasculature in patients with suspected PE. It allows adequate visualization of the pulmonary arteries down to the subsegmental level.112–114 The Prospective Investigation On Pulmonary Embolism Diagnosis (PIOPED) II study observed a sensitivity of 83% and a specificity of 96% for (mainly four-detector) CTPA in PE diagnosis.
D-dimer levels are elevated in plasma in the presence of acute thrombosis because of simultaneous activation of coagulation and fibrinolysis. The negative predictive value of D-dimer testing is high, and a normal D-dimer level renders acute PE or DVT unlikely. On the other hand, the positive predictive value of elevated D-dimer levels is low and D-dimer testing is not useful for confirmation of PE.
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This question is part of the following fields:
- Post-operative Management And Critical Care
- Principles Of Surgery-in-General
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Question 13
Incorrect
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Which among the following vertebrae marks the lowest extent of the superior mediastinum?
Your Answer: Third thoracic
Correct Answer: Fourth thoracic
Explanation:The superior mediastinum lies between the manubrium anteriorly and the upper vertebrae of the thorax posteriorly. Below, it is bound by a slightly oblique plane that passes backward from the sternal angle to the lower part of the body of T4 and laterally by the pleura.
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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 63 year old man presents with recurrent colicky abdominal pain. A CT scan demonstrates a hernia lateral to the rectus muscle at the level of the arcuate line. What type of hernia would this be classified as?
Your Answer: Spigelian
Explanation:A Spigelian hernia (or lateral ventral hernia) is a hernia through the Spigelian fascia, which is the aponeurotic layer between the rectus abdominis muscle medially, and the semilunar line laterally. These are generally interparietal hernias, meaning that they do not lie below the subcutaneous fat but penetrate between the muscles of the abdominal wall; therefore, there is often no notable swelling.
Spigelian hernias are usually small and therefore risk of strangulation is high. Most occur on the right side. (4th–7th decade of life.) Compared to other types of hernias they are rare.
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This question is part of the following fields:
- Generic Surgical Topics
- The Abdomen
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Question 15
Correct
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Multiple cells were labelled using a fluorescent dye that doesn’t cross the cell membrane. One cell in the middle was bleached with a light that destroys the dye, but the cell soon recovers its stain. The presence of which structures best explains this?
Your Answer: Gap junctions
Explanation:Gap junctions are attachments between cells that permit intercellular communication e.g. they permit current flow and electrical coupling between myocardial cells. They allow direct electrical transmission among cells and also permit certain substance to pass through as well. They are either homotypic, formed by two identical hemichannels or heterotypic, formed by different hemichannels.
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This question is part of the following fields:
- Basic Sciences
- Physiology
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Question 16
Correct
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A woman that presented with dyspnoea, chest pain and cough was found to have a serous pleural effusion. This finding is most likely to be associated with which of the following conditions?
Your Answer: Congestive heart failure
Explanation:A pleural effusion is defined as an abnormal collection of fluid in the pleural space. Pleural effusion can result from excess fluid production or decreased absorption or both. Thoracentesis and laboratory testing help determine the origin of the accumulated fluid. Serous fluid accumulation in the pleural space indicates the presence of a hydrothorax and is most likely to develop secondary to congestive heart failure.
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This question is part of the following fields:
- Basic Sciences
- Pathology
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Question 17
Incorrect
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What best describes the muscles of the posterior compartment of the leg?
Your Answer: A-It crosses two joints
Correct Answer: One of the posterior compartment leg muscles laterally rotates the femur
Explanation:The muscles of the back of the leg are subdivided into two groups: superficial and deep. Superficial muscles include gastrocnemius, soleus and plantaris and are the chief extensors of the foot at the ankle joint. Deep muscles include the tibialis posterior, flexor hallucis longus, flexor digitorum longus and popliteus
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This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 18
Incorrect
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A 23-year-old woman decides to donate a kidney through a kidney chain. Which of the following indices would be expected to be decreased in the donor after full recovery from the operation?
Your Answer: Plasma creatinine concentration
Correct Answer: Creatinine clearance
Explanation:Since medication to prevent rejection is so effective, donors do not need to be similar to their recipient. Most donated kidneys come from deceased donors; however, the utilisation of living donors is on the rise. Most problems encountered with live donation are associated with the donor. Firstly, there are the potentially harmful investigative procedures carried out in the assessment phase, the most hazardous being renal angiography, where there is cannulation of the artery and injection of a radio-opaque dye to determine the blood supply to the kidney. Secondly, there are the short-term risks of nephrectomy surgery. According to the literature, there is a mortality rate of between 1 in 1600 and 1 in 3000, but this is no more than is associated with any anaesthetic. In the initial postoperative period creatinine clearance may be decreased but this recovers fully over a few weeks to months. Long-term complications include prolonged wound pain.
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This question is part of the following fields:
- Basic Sciences
- Physiology
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Question 19
Incorrect
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A 58 year old lady who has had a mastectomy undergoes a breast reconstruction surgery. The breast implant is placed just anterior to her pectoralis major muscle. Which of the following methods of wound closure would be the most appropriate in this case?
Your Answer: Use of a split thickness skin graft
Correct Answer: Use of a pedicled myocutaneous flap
Explanation:The latissimus dorsi myocutaneous flap (LDMF) is one of the most reliable and versatile flaps used in reconstructive surgery. It is known for its use in chest wall and postmastectomy reconstruction and has also been used effectively for coverage of large soft tissue defects in the head and neck, either as a pedicled flap or as a microvascular free flap.
The latissimus dorsi may be transferred as a myofascial flap, a myocutaneous flap, or as a composite osteomyocutaneous flap when harvested with underlying serratus anterior muscle and rib. For even greater reconstructive flexibility, the latissimus can be harvested for free tissue transfer in combination with any or all of the other flaps based on the subscapular vessels (the so-called subscapular compound flap or “mega-flap”), including serratus anterior, scapular, and parascapular flaps
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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 20
Correct
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What occurs during cellular atrophy?
Your Answer: Cell size decreases
Explanation:Atrophy is the decrease in the size of cells, tissues, or organs. There are several causes including inadequate nutrition, poor circulation, loss of hormonal support or nerve supply, disuse, lack of exercise, or disease. An increase in cell size is termed hypertrophy which is distinguished from hyperplasia, in which the cells remain approximately the same size but increase in number.
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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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When at rest, which of the following will be higher in a marathon runner compared to an untrained individual?
Your Answer: Cardiac stroke volume
Explanation:Cardiac muscle hypertrophy is seen in trained athletes as compared to the normal population. This hypertrophy results in higher stroke volume at rest and increased cardiac reserve (maximum cardiac output during exercise). However, the cardiac output at rest is almost the same in both trained and untrained people. This is because in trained athletes, the heart rate is slower, even up to 40-50 beats/min. There is minimal affect of athletic training on oxygen consumption and respiratory rate.
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This question is part of the following fields:
- Basic Sciences
- Physiology
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Question 22
Correct
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The Carpal tunnel does NOT contain:
Your Answer: Flexor carpi ulnaris
Explanation:The contents of the carpal tunnel include:
– Median nerve
– Flexor digitorum supervicialis
– Flexor digitorum profundus
– Flexor policis longus
– Flexor carpi radialis -
This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 23
Correct
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Where do the cells belonging to the mononuclear phagocyte system originate?
Your Answer: Bone marrow
Explanation:The macrophage originates from a committed bone marrow stem cell. It is called the pluripotent hematopoietic stem cell. This differentiates into a monoblast and then into a promonocyte and finally matures into a monocyte. When called upon they leave the bone marrow and enter into the circulation. Upon entering the tissue they transform into macrophages. Tissue macrophages include: Kupffer cells (liver), alveolar macrophages (lung), osteoclasts (bone), Langerhans cells (skin), microglial cells (central nervous system), and possibly the dendritic immunocytes of the dermis, spleen and lymph nodes.
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This question is part of the following fields:
- Basic Sciences
- Pathology
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Question 24
Incorrect
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A 42 year old man slips while walking down the stairs and injures his ankle. He is rushed to the doctor's office and on examination, he has tenderness over the lateral and medial malleolus. X-rays demonstrate an undisplaced fracture of the distal fibula at the level of the syndesmosis and a congruent ankle mortise. What is the best course of management?
Your Answer: Surgical fixation
Correct Answer: Application of below knee plaster cast
Explanation:Fractures of the distal tibia and fibula may result in loss of stability of the ankle joint. They may present as a fracture only, fracture and ligamentous injury, multiple fractures or a fracture dislocation.
Isolated fibular fractures at the level of the syndesmosis (Weber B) without associated medial injury should be placed in a short leg backslab (ankle at plantargrade) and remain NWB (non-weight bearing).
With medial malleolus fractures care should be taken to rule out any other fracture or injury around the ankle. The entire length of the fibula should be palpated and x-rayed to rule out any Maisonneuve type injuries. Any other fracture, ligament injury or talar shift indicate the fracture is likely to be unstable and should be reviewed by orthopaedics.
If medial malleolar injury is truly isolated then a short leg backslab (below knee plaster cast) should be applied and the patient is to remain NWB until orthopaedic review.
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This question is part of the following fields:
- Generic Surgical Topics
- Orthopaedics
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Question 25
Correct
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A 15 year old girl is taken to the A&E after complaining of right iliac fossa pain which started suddenly. She is well other than having some right iliac fossa tenderness but no guarding. She has no fever and the urinary dipstick result is normal. Her last menstrual cycle was 14 days ago which was also normal and the pregnancy test done is negative. What is the most likely underlying condition?
Your Answer: Mittelschmerz
Explanation:Answer: Mittelschmerz
Mittelschmerz 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. -
This question is part of the following fields:
- Generic Surgical Topics
- The Abdomen
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Question 26
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: Ceftriaxone
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:
- Basic Sciences
- Pathology
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Question 27
Correct
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A 21-year-old man is admitted to the hospital with diarrhoea and severe abdominal pain for the past 18 hours. He was asymptomatic before that.Which of the following is the likely cause?
Your Answer: Campylobacter jejuni infection
Explanation:Severe abdominal pain tends to favour infection with Campylobacter jejuni.
Infection with Campylobacter jejuni is one of the most common causes of gastroenteritis worldwide. In developed countries, the incidence of Campylobacter jejuni infections peaks during infancy and, again, during early adulthood. Most infections are acquired by the consumption and handling of poultry. A typical case is characterized by diarrhoea, fever, and severe abdominal cramps. Obtaining cultures of the organism from stool samples remains the best way to diagnose this infection. Complications of C. jejuni infections are rare, and most patients do not require antibiotics. Careful food preparation and cooking practices may prevent some Campylobacter infections.
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This question is part of the following fields:
- Colorectal Surgery
- Generic Surgical Topics
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Question 28
Correct
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Which of the following statements regarding the femoral artery is CORRECT?
Your Answer: It has the femoral nerve lying lateral to it
Explanation:The femoral artery begins immediately behind the inguinal ligament, midway between the anterior superior spine of the ilium and the symphysis pubis. The first 4 cm of the vessel is enclosed, together with the femoral vein, in a fibrous sheath (the femoral sheath). The femoral nerve lies lateral to this.
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This question is part of the following fields:
- Anatomy
- Basic Sciences
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Question 29
Correct
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A 33 year old woman presents with a complaint of dysphagia. She has a ten year history of treatment refractory anaemia secondary to menorrhagia. Which of the following is the most likely underlying cause?
Your Answer: Plummer Vinson syndrome
Explanation:Iron deficiency anaemia (IDA) is the most common form of anaemia worldwide and can be due to inadequate intake, decreased absorption (e.g., atrophic gastritis, inflammatory bowel disease), increased demand (e.g., during pregnancy), or increased loss (e.g., gastrointestinal bleeding, menorrhagia) of iron. Prolonged deficiency depletes the iron stores in the body, resulting in decreased erythropoiesis and anaemia.
Symptoms are nonspecific and include fatigue, pallor, lethargy, hair loss, brittle nails, and pica. Diagnostic lab values include low haemoglobin, microcytic, hypochromic red blood cells on peripheral smear, and low ferritin and iron levels. Once diagnosed, the underlying cause should be determined. Patients at risk for underlying gastrointestinal malignancy should also undergo a colonoscopy.
Iron deficiency anaemia is treated with oral (most common) or parenteral iron supplementation. Severe anaemia or those with concomitant cardiac conditions may also require blood transfusions. The underlying cause of IDA should also be corrected. IDA may manifest as Plummer-Vinson syndrome (PVS): triad of postcricoid dysphagia, upper oesophageal webs, and iron deficiency anaemia -
This question is part of the following fields:
- Generic Surgical Topics
- Upper Gastrointestinal Surgery
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Question 30
Correct
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Which of the following is a likely consequence of severe diarrhoea?
Your Answer: A decrease in the sodium content of the body
Explanation:Diarrhoea can occur due to any of the numerous aetiologies, which include infectious, drug-induced, food related, surgical, inflammatory, transit-related or malabsorption. Four mechanisms have been implicated in diarrhoea: increased osmotic load, increased secretion, inflammation and decreased absorption time. Diarrhoea can result in fluid loss with consequent dehydration, electrolyte loss (Na+, K+, Mg2+, Cl–) and even vascular collapse. Loss of bicarbonate ions can lead to a metabolic acidosis.
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This question is part of the following fields:
- Basic Sciences
- Physiology
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SESSION STATS - PERFORMANCE PER SPECIALTY
