1. Internal Medicine
Q1. A 45-year-old male presents with a 3-month history of productive cough, night sweats, and significant weight loss. He lives in a crowded urban area in Addis Ababa. His sputum smear is positive for Acid-Fast Bacilli (AFB). Which of the following is the standard initial first-line regimen for this patient according to national tuberculosis guidelines?
A) 2 months of Rifampicin, Isoniazid, Pyrazinamide, and Ethambutol, followed by 4 months of Rifampicin and Isoniazid
B) 2 months of Rifampicin and Isoniazid, followed by 4 months of Pyrazinamide and Ethambutol
C) 6 months of continuous Rifampicin, Isoniazid, and Ethambutol
D) 2 months of Streptomycin, Isoniazid, and Ethambutol, followed by 4 months of Rifampicin
Correct Answer: A
Explanation: According to national guidelines, the standard short-course chemotherapy for new drug-susceptible pulmonary TB consists of a 2-month intensive phase with four drugs (2RHZE) and a 4-month continuation phase with two drugs (4RH).
Q2. A 32-year-old male presents with a 2-day history of high-grade fever, chills, severe headache, and joint pain. He recently traveled to a malaria-endemic lowland region. A rapid diagnostic test (RDT) is positive for Plasmodium falciparum. He is fully conscious, able to take oral medication, and shows no signs of organ dysfunction. What is the recommended first-line treatment?
A) Oral Artemether-Lumefantrine
B) Intravenous Artesunate
C) Oral Chloroquine
D) Oral Quinine
Correct Answer: A
Explanation: Oral Artemether-Lumefantrine (Coartem) is the standard first-line treatment for uncomplicated Plasmodium falciparum malaria in Ethiopia. Parenteral treatment (IV Artesunate) is reserved for severe malaria.
Q3. A 60-year-old female presents to the emergency department with a 6-hour history of severe, crushing substernal chest pain radiating to her left arm, accompanied by diaphoresis. An electrocardiogram (ECG) shows ST-segment elevation in leads II, III, and aVF. Which coronary artery is most likely occluded?
A) Left Anterior Descending (LAD) artery
B) Right Coronary Artery (RCA)
C) Left Circumflex (LCx) artery
D) Left Main Coronary Artery
Correct Answer: B
Explanation: ST-segment elevation in leads II, III, and aVF indicates an acute inferior wall myocardial infarction (STEMI), which is typically caused by the occlusion of the Right Coronary Artery (RCA).
Q4. A 55-year-old chronic cirrhotic patient presents with a tense abdomen, shifting dullness, and a fluid thrill. Paracentesis is performed, and the ascitic fluid analysis reveals a serum-ascites albumin gradient (SAAG) of 1.4 g/dL. What does this SAAG value indicate regarding the etiology of the ascites?
A) Peritoneal Carcinomatosis
B) Portal Hypertension
C) Tuberculous Peritonitis
D) Nephrotic Syndrome
Correct Answer: B
Explanation: A SAAG value of 1.1 g/dL or higher indicates that the ascites is caused by transudative pressures related to portal hypertension, highly consistent with liver cirrhosis.
Q5. A 65-year-old male with a history of chronic osteoarthritis presents to the emergency room with a 4-hour history of hematemesis and epigastric burning pain. He reports taking high-dose Ibuprofen daily for the past 6 months. What is the primary mechanism of injury leading to this presentation?
A) Inhibition of Cyclooxygenase-1 (COX-1) leading to decreased prostaglandin synthesis
B) Direct chemical necrosis of the esophageal sphincters
C) Stimulation of gastrin-secreting cells in the antrum
D) Inactivation of mucosal parietal cell H+/K+ ATPase pumps
Correct Answer: A
Explanation: Non-selective NSAIDs like Ibuprofen block the COX-1 enzyme. This curtails the production of cytoprotective prostaglandins (PGE
2
and PGI
2
), reducing mucosal blood flow, mucus production, and bicarbonate secretion, making the stomach vulnerable to acid injury and bleeding.
Q6. A 35-year-old male presents with a 5-day history of high-grade fever, severe headache, muscle pain (particularly in his calves), and yellowing of the eyes. He works as a sewage cleaner in an urban center. On physical exam, he has conjunctival suffusion and hepatomegaly. Lab tests show elevated serum bilirubin, acute kidney injury with a serum creatinine of 2.8 mg/dL, and mild thrombocytopenia. What is the most likely diagnosis?
A) Weil’s disease (Severe Leptospirosis)
B) Acute Hepatitis A
C) Severe Typhoid Fever
D) Yellow Fever
Correct Answer: A
Explanation: Weil’s disease is a severe form of leptospirosis characterized by the triad of jaundice, acute kidney injury, and hemorrhages, often associated with occupational exposure to contaminated water or animal urine.
Q7. A 56-year-old female with a long history of poorly controlled type 2 diabetes presents with a 2-week history of a deep, painless ulcer on the plantar surface of her right foot under the first metatarsal head. The foot is warm, with decreased sensation to a 10-g monofilament test, but peripheral pulses are strong and palpable. What is the primary underlying cause of this ulcer?
A) Macrovascular peripheral arterial disease
B) Sensory peripheral neuropathy
C) Acute deep venous thrombosis
D) Lymphatic obstruction
Correct Answer: B
Explanation: Diabetic neuropathic ulcers result from a loss of protective sensation, which leads to repetitive, unperceived mechanical trauma over weight-bearing bony prominences.
Q8. A 72-year-old male is brought to the emergency clinic by his family due to acute confusion and lethargy. He has a history of advanced lung cancer. Laboratory evaluation reveals a serum calcium level of 14.5 mg/dL. What is the initial step in the immediate management of this life-threatening hypercalcemia?
A) Intravenous infusion of 0.9% Normal Saline for volume expansion
B) Oral administration of calcium carbonate supplements
C) Intravenous injection of Potassium Chloride bolus
D) Immediate total parathyroidectomy
Correct Answer: A
Explanation: The immediate priority in severe hypercalcemia is restoration of intravascular volume with 0.9% normal saline to reverse dehydration and promote renal calcium excretion.
Q9. A 22-year-old university student is brought to the emergency department with a 24-hour history of severe headache, high fever, and altered consciousness. On physical exam, the patient is lethargic and demonstrates a positive Brudzinski sign. Petechial rashes are noted on his lower extremities. What is the most appropriate empirical antibiotic regimen?
A) Intravenous Ceftriaxone combined with Vancomycin
B) Oral Amoxicillin alone
C) Intravenous Metronidazole monotherapy
D) Intravenous Gentamicin alone
Correct Answer: A
Explanation: This combination provides broad empirical coverage against the primary bacterial pathogens responsible for adult meningitis, including Neisseria meningitidis and Streptococcus pneumoniae, while crossing the blood-brain barrier.
Q10. A 62-year-old male with a history of chronic heavy alcohol consumption presents with progressive abdominal distension, hematemesis, and confusion. On exam, he has scleral icterus, ascites, and a flapping tremor (asterixis) of his outstretched hands. Which of the following substances is primarily responsible for the neurological symptoms observed in this patient?
A) Unconjugated Bilirubin
B) Ammonia
C) Ethanol
D) Lactic Acid
Correct Answer: B
Explanation: Impaired hepatic clearance of nitrogenous waste in cirrhosis leads to elevated systemic ammonia levels, which cross the blood-brain barrier and cause neurotoxicity, manifesting as hepatic encephalopathy and asterixis.
Q11. A 48-year-old female presents with a 1-month history of progressive fatigue, generalized weakness, and significant weight gain despite a reduced appetite. She also notes severe constipation and cold intolerance. On physical examination, she has a slow pulse rate (bradycardia), dry coarse skin, and a delayed relaxation phase of the deep tendon reflexes. What is the most likely diagnostic lab profile?
A) Low Serum TSH, High Free T4
B) High Serum TSH, Low Free T4
C) High Serum TSH, High Free T4
D) Low Serum TSH, Low Free T4
Correct Answer: B
Explanation: The clinical signs point directly to primary hypothyroidism. The lack of peripheral thyroid hormone leads to a compensatory increase in TSH from the anterior pituitary and low levels of circulating free thyroxine (T4).
Q12. A 33-year-old female presents to the outpatient department complaining of easy fatigability, palpitations, and a sore tongue for 3 months. A complete blood count (CBC) reveals a hemoglobin level of 7.8 g/dL and a markedly elevated mean corpuscular volume (MCV = 115 fL). A peripheral blood smear demonstrates macro-ovalocytes and hypersegmented neutrophils (≥6 lobes). What is the most likely diagnosis?
A) Iron Deficiency Anemia
B) Anemia of Chronic Disease
C) Megaloblastic Anemia (Vitamin B12 or Folate Deficiency)
D) Thalassemia Minor
Correct Answer: C
Explanation: Macrocytic anemia (MCV >100 fL) accompanied by hypersegmented neutrophils and macro-ovalocytes on a peripheral blood smear is the classic laboratory presentation of megaloblastic anemia.
Q13. A 52-year-old male with a history of chronic hepatitis B presents with a 2-month history of right upper quadrant abdominal pain, weight loss, and early satiety. Physical examination reveals an enlarged, nodular liver and a continuous bruit over the hepatic area. Laboratory testing shows a significantly elevated serum alpha-fetoprotein (AFP) level of 800 ng/mL. What is the most likely diagnosis?
A) Hepatic Hemangioma
B) Hepatocellular Carcinoma (HCC)
C) Amebic Liver Abscess
D) Hydatid Cyst of the Liver
Correct Answer: B
Explanation: A history of chronic hepatitis B paired with weight loss, a nodular liver with a vascular bruit, and a markedly elevated alpha-fetoprotein level (>400 ng/mL) is diagnostic for hepatocellular carcinoma.
Q14. A 50-year-old male patient presents with a history of episodic severe headaches, palpitations, and profuse diaphoresis. During the clinic evaluation, his blood pressure is recorded at 210/120 mmHg. A 24-hour urinary collection reveals significantly elevated levels of metanephrines and catecholamines. What is the anatomical location of the tumor responsible for this condition?
A) Pituitary anterior lobe
B) Adrenal Cortex
C) Adrenal Medulla
D) Thyroid parafollicular C-cells
Correct Answer: C
Explanation: A pheochromocytoma is a catecholamine-secreting tumor arising from the chromaffin cells of the adrenal medulla, presenting with episodic hypertensive crises, headache, and sweating.
Q15. A 40-year-old female presents with a 6-month history of weight loss despite an increased appetite, heat intolerance, hand tremors, and palpitations. On examination, she has a diffusely enlarged, non-tender thyroid gland and a noticeable stare with exophthalmos. What is the most likely primary autoantibody mechanism behind this disease?
A) Antibodies against Thyroid Peroxidase (Anti-TPO)
B) Thyrotropin Receptor Antibodies (TRAb) that stimulate the TSH receptor
C) Antibodies against Thyroglobulin (Anti-Tg)
D) Blocking antibodies against the iodine symporter
Correct Answer: B
Explanation: Graves’ disease is caused by autoantibodies (TRAb) that bind to and activate the TSH receptor, causing autonomous thyroid hormone production, glandular hyperplasia, and extrathyroidal features like exophthalmos.
Q16. A 54-year-old male presents with a history of chronic heart failure. He is currently taking Digoxin, Furosemide, and Enalapril. He presents to the clinic complaining of nausea, anorexia, and blurred vision with a yellowish-green tint. An ECG shows a prolonged PR interval and frequent premature ventricular contractions (PVCs). Which electrolyte abnormality most increases this patient’s risk for this presentation?
A) Hyperkalemia
B) Hypokalemia
C) Hypernatremia
D) Hypocalcemia
Correct Answer: B
Explanation: Hypokalemia (frequently caused by loop diuretics like Furosemide) increases myocardial sensitivity to Digoxin, precipitating toxicity even at borderline therapeutic serum levels.
Q17. A 28-year-old male presents to the outpatient clinic with a 2-week history of polyuria, polydipsia, and significant weight loss. His random plasma glucose is 280 mg/dL, and his HbA1c is 9.5%. Urinalysis reveals 3+ ketones. What is the most appropriate long-term management strategy for this patient?
A) Oral Metformin therapy
B) Oral Glibenclamide therapy
C) Lifelong subcutaneous Insulin therapy
D) Strict dietary control and lifestyle modifications alone
Correct Answer: C
Explanation: The presentation of acute symptoms, young age, and significant ketonuria indicates Type 1 Diabetes Mellitus, which is caused by autoimmune destruction of pancreatic beta cells, requiring lifelong insulin replacement.
Q18. A 67-year-old female presents to the emergency room with a 1-day history of acute onset of severe pain, redness, and swelling in her right knee joint. She denies any history of trauma. Joint aspiration is performed, and synovial fluid analysis reveals weakly positive, positively birefringent, rhomboid-shaped crystals. What is the composition of these crystals?
A) Monosodium urate
B) Calcium pyrophosphate dihydrate
C) Calcium oxalate
D) Hydroxyapatite
Correct Answer: B
Explanation: Rhomboid-shaped, weakly positively birefringent crystals confirm a diagnosis of pseudogout, which is caused by the deposition of calcium pyrophosphate dihydrate (CPPD) in the joints.
Q19. A 45-year-old chronic heavy smoker presents with a 6-month history of a persistent cough, hemoptysis, and left-sided chest pain. On physical examination, you note miosis, ptosis, and anhidrosis on the left side of his face. What is the anatomical location of the tumor causing these specific facial symptoms?
A) Main bronchus bifurcation
B) Apex of the left lung (Pancoast tumor)
C) Right middle lobe lung parenchyma
D) Mediastinal lymph nodes
Correct Answer: B
Explanation: A Pancoast tumor located at the superior sulcus (apex) of the lung can compress the cervical sympathetic chain, resulting in ipsilateral Horner’s syndrome (ptosis, miosis, anhidrosis).
Q20. A 35-year-old male is brought to the emergency clinic due to severe generalized body weakness and vomiting. His laboratory results reveal a serum sodium level of 128 mEq/L, serum potassium of 6.2 mEq/L, and a morning serum cortisol level of 2 µg/dL (markedly low). His skin appears hyperpigmented, especially over palmar creases and scars. What is the primary underlying diagnosis?
A) Primary Adrenal Insufficiency (Addison’s disease)
B) Secondary Pituitary Insufficiency
C) Primary Hyperaldosteronism
D) Cushing’s Syndrome
Correct Answer: A
Explanation: Addison’s disease involves autoimmune or infectious destruction of the entire adrenal cortex, leading to a deficiency of mineralocorticoids (hyponatremia, hyperkalemia) and glucocorticoids, with hyperpigmentation driven by elevated ACTH.
2. General Surgery & Orthopedics
Q21. A 40-year-old male is brought to the emergency department after a motor vehicle accident. He is tachycardic (HR 120 bpm), hypotensive (BP 85/50 mmHg), and has distended neck veins. On thoracic examination, there are decreased breath sounds and hyperresonance on the right hemithorax. What is the immediate life-saving intervention?
A) Obtain an urgent chest X-ray
B) Perform needle thoracocentesis in the second intercostal space at the midclavicular line
C) Perform endotracheal intubation and mechanical ventilation
D) Administer a rapid 2-liter bolus of normal saline
Correct Answer: B
Explanation: The clinical triad of hypotension, distended neck veins, and unilateral absent breath sounds with hyperresonance signifies a tension pneumothorax. Immediate needle decompression is vital to restore venous return before waiting for any imaging.
Q22. A 50-year-old chronic heavy smoker presents with progressive, painless jaundice, clay-colored stools, and dark tea-colored urine for 1 month. On examination, he has a palpable, non-tender gallbladder in the right upper quadrant. What is the most likely diagnosis?
A) Acute Cholecystitis
B) Choledocholithiasis
C) Carcinoma of the Head of the Pancreas
D) Hepatocellular Carcinoma
Correct Answer: C
Explanation: Courvoisier’s Law states that in a patient with progressive, painless jaundice, a palpably enlarged, non-tender gallbladder is highly unlikely to be caused by gallstones and instead points toward a malignant biliary obstruction, such as pancreatic head adenocarcinoma.
Q23. A 70-year-old male with a known history of benign prostatic hyperplasia (BPH) presents to the emergency room with severe lower abdominal discomfort and an inability to urinate for the past 10 hours. On palpation, a distended, tender bladder is felt up to the umbilicus. What is the most appropriate initial management step?
A) Prescribe oral Finasteride and arrange an outpatient clinic visit
B) Perform urgent transurethral resection of the prostate (TURP)
C) Insert a urethral Foley catheter to decompress the bladder
D) Administer aggressive intravenous fluid boluses
Correct Answer: C
Explanation: This patient is experiencing acute urinary retention secondary to BPH. The immediate, definitive emergency intervention required to relieve severe pain and safeguard the upper urinary tract is decompression via urethral catheterization.
Q24. A 45-year-old female presents to the emergency outpatient unit with acute, severe upper abdominal pain that radiates straight through to her back, accompanied by persistent vomiting. On examination, she has marked epigastric tenderness. Laboratory results show a serum lipase level more than 5 times the upper limit of normal. Which of the following is the most appropriate initial priority in the management of this patient?
A) Aggressive intravenous fluid resuscitation with Lactated Ringer’s solution
B) Immediate surgical debridement of the pancreas
C) Empirical administration of broad-spectrum intravenous antibiotics
D) Insertion of a nasogastric tube for total bowel decompression
Correct Answer: A
Explanation: Early aggressive fluid resuscitation is the cornerstone of acute pancreatitis management to maintain pancreatic microcirculation and prevent multi-organ failure.
Q25. A 23-year-old male is brought to the emergency department after falling from a scaffold. He is conscious but in severe respiratory distress. His blood pressure is 90/60 mmHg, and his pulse rate is 115 bpm. On chest examination, you observe a segment of the left chest wall sinking inward during inspiration and bulging outward during expiration. What is the most accurate description of this clinical finding?
A) Simple Pneumothorax
B) Flail Chest
C) Massive Hemothorax
D) Cardiac Tamponade
Correct Answer: B
Explanation: Flail chest occurs when consecutive ribs are fractured in two or more places, creating a free-floating segment that moves paradoxically relative to the rest of the thoracic cage.
Q26. A 32-year-old female presents with a 2-month history of a painless, slow-growing lump in her right breast. On examination, there is a 3 cm hard, irregular, fixed mass in the upper outer quadrant of the right breast with associated dimpling of the overlying skin. What is the gold standard method to establish a definitive tissue diagnosis?
A) Screening Mammography
B) Core Needle Biopsy
C) Breast Ultrasound
D) Serum CA 15-3 tumor marker assay
Correct Answer: B
Explanation: A core needle biopsy is the gold standard method to obtain intact tissue architecture, allowing differentiation between invasive and in situ breast carcinoma.
Q27. A 25-year-old male is brought to the emergency center with a deep stab wound to the left side of his neck, anterior to the sternocleidomastoid muscle. He is hemodynamically stable. On examination, you note that when he attempts to protrude his tongue, it deviates noticeably toward the left side. Which cranial nerve has been injured?
A) Glossopharyngeal Nerve (CN IX)
B) Vagus Nerve (CN X)
C) Hypoglossal Nerve (CN XII)
D) Facial Nerve (CN VII)
Correct Answer: C
Explanation: The hypoglossal nerve provides motor innervation to the intrinsic and extrinsic muscles of the tongue. An injury causes the tongue to deviate toward the ipsilateral (damaged) side upon protrusion.
Q28. A 30-year-old male is brought to the emergency department following a head injury from an assault. Initially, he was unconscious for 10 minutes, then completely regained full consciousness and talked normally with his family (lucid interval). However, 2 hours later, he rapidly became somnolent and developed a dilated, unreactive right pupil. What type of intracranial hemorrhage is most likely?
A) Subarachnoid Hemorrhage
B) Subdural Hematoma
C) Epidural Hematoma
D) Interecerebral Hemorrhage
Correct Answer: C
Explanation: The classic clinical presentation of an epidural hematoma—typically caused by a tear of the middle meningeal artery—involves a brief loss of consciousness followed by a temporary “lucid interval” before rapid neurological decline and uncal herniation.
Q29. A 68-year-old male presents with a 6-month history of a weak urinary stream, hesitancy, post-void dribbling, and waking up 4 times a night to urinate. Digital rectal examination (DRE) reveals a significantly enlarged, smooth, firm, non-tender prostate gland without distinct nodules. Serum Prostate-Specific Antigen (PSA) is 2.5 ng/mL (normal <4.0 ng/mL). What is the most likely diagnosis?
A) Prostate Adenocarcinoma
B) Benign Prostatic Hyperplasia (BPH)
C) Acute Bacterial Prostatitis
D) Chronic Pelvic Pain Syndrome
Correct Answer: B
Explanation: BPH characteristically presents in older men with lower urinary tract symptoms (LUTS). The finding of a smooth, symmetrically enlarged prostate on DRE and a normal PSA level supports this benign diagnosis over malignancy.
Q30. A 24-year-old male presents to the emergency department following a motor vehicle collision. He has a closed fracture of the right mid-shaft femur. Two hours after application of a traction splint, he complains of severe, excruciating pain in his right thigh that is out of proportion to physical findings and is exacerbated by passive stretching of the muscles. The thigh is tense and swollen. Peripheral pulses are still weakly palpable. What is the immediate management step?
A) Administer high-dose intravenous opioids and elevate the leg
B) Loosen any external constrictive dressings and measure compartment pressure/arrange for urgent fasciotomy
C) Apply an ice pack and repeat a plain radiograph of the femur
D) Schedule an elective open reduction and internal fixation (ORIF) for tomorrow
Correct Answer: B
Explanation: The development of severe pain out of proportion to injuries and exacerbated by passive stretching signifies acute compartment syndrome, a surgical emergency requiring immediate decompression via fasciotomy to prevent muscle necrosis.
Q31. A 19-year-old male is brought to the emergency ward with a 1-day history of right lower quadrant abdominal pain, which initially started around the umbilicus. He reports anorexia, nausea, and a low-grade fever. On examination, there is marked tenderness at McBurney's point and a positive Rovsing sign. What is the primary diagnostic approach for this patient?
A) Perform an urgent abdominal CT scan with oral contrast
B) Establish clinical diagnosis based on history and physical exam and prepare for appendectomy
C) Obtain serial plain abdominal radiographs every 4 hours
D) Order an urgent upper gastrointestinal endoscopy
Correct Answer: B
Explanation: Acute appendicitis is primarily a clinical diagnosis based on characteristic history (periumbilical pain migrating to the RLQ) and local signs of peritoneal inflammation. Unnecessary diagnostic imaging should not delay definitive appendectomy.
Q32. A 60-year-old female presents with an 8-hour history of severe right upper quadrant abdominal pain, fever, and shaking chills. On physical examination, she is visibly jaundiced and hypotensive (BP 90/60 mmHg). What is the name of this clinical presentation and its underlying pathology?
A) Murphy's triad; acute cholecystitis
B) Charcot's triad; acute calculous cholecystitis
C) Reynolds' pentad; acute ascending cholangitis
D) Virchow's triad; deep venous thrombosis
Correct Answer: C
Explanation: Reynolds' pentad consists of fever, RUQ pain, jaundice, altered mental status, and hypotension/shock. It signifies severe, life-threatening acute ascending cholangitis secondary to biliary tract obstruction and infection.
Q33. A 45-year-old obese female presents with a 1-day history of episodic, severe right upper quadrant abdominal pain that radiates to her right scapula, precipitated by eating a fatty meal. On examination, there is marked tenderness in the RUQ, and inspiration is arrested when the examiner deep-palpates under the costal margin. What is this clinical sign?
A) Rovsing's sign
B) Murphy's sign
C) Cullen's sign
D) Grey Turner's sign
Correct Answer: B
Explanation: A positive Murphy's sign is an arrest of inspiration during deep palpation of the RUQ, highly sensitive and specific for acute cholecystitis.
Q34. A 28-year-old male presents to the emergency room following a stab wound to the left chest. He is dyspneic and tachycardic. His blood pressure is 80/40 mmHg, neck veins are distended, and heart sounds are noticeably muffled on auscultation. Lung fields are clear bilaterally with equal breath sounds. What is the most likely diagnosis?
A) Tension Pneumothorax
B) Massive Hemothorax
C) Cardiac Tamponade
D) Flail Chest
Correct Answer: C
Explanation: Beck's triad (hypotension, distended neck veins, and muffled heart sounds) in the presence of penetrating chest trauma is highly diagnostic for cardiac tamponade.
Q35. A 55-year-old male presents with a 6-month history of a painless mass in his right groin that increases in size upon coughing or standing and completely disappears when lying flat. On physical examination, the mass is located superior to the inguinal ligament, and during an inguinal occlusion test, the mass is controlled when pressure is applied over the deep inguinal ring. What type of hernia is this?
A) Direct Inguinal Hernia
B) Indirect Inguinal Hernia
C) Femoral Hernia
D) Umbilical Hernia
Correct Answer: B
Explanation: An indirect inguinal hernia passes through the deep inguinal ring lateral to the inferior epigastric vessels and can be controlled during an internal ring occlusion test.
Q36. A 50-year-old male presents with a 3-day history of absolute constipation, abdominal distension, and early-onset, feculent vomiting. Abdominal radiographs demonstrate multiple dilated loops of small bowel with central air-fluid levels in a "stepladder" pattern. He has a surgical scar from an appendectomy 10 years ago. What is the most common cause of this obstruction?
A) Intestinal Intussusception
B) Volvulus of the colon
C) Postoperative Adhesions
D) Incarcerated femoral hernia
Correct Answer: C
Explanation: Postoperative adhesions are the leading cause of small bowel obstruction in adults who have undergone prior abdominal surgical procedures.
Q37. A 35-year-old male presents to the clinic with an exquisitely painful, swollen, bluish lump at the anal verge that appeared suddenly 24 hours ago after straining during defecation. On examination, a 1 cm tense, tender, dark purple nodule is seen covered by squamous epithelium. What is the most appropriate initial management for this acute presentation?
A) High-fiber diet and stool softeners for 4 weeks
B) Excision or incision and evacuation of the thrombus under local anesthesia
C) Immediate formal hemorrhoidectomy under general anesthesia
D) Prescription of systemic broad-spectrum antibiotics
Correct Answer: B
Explanation: This patient has an acute, thrombosed external hemorrhoid. Within the first 72 hours of onset, acute severe pain is best relieved by local incision and evacuation of the clot.
Q38. A 40-year-old male presents to the emergency department after a high-speed motor vehicle crash. He is hemodynamically stable. On examination, he has a pelvic fracture, blood at the external urethral meatus, a high-riding prostate on digital rectal examination, and perineal ecchymosis. What is the most appropriate initial diagnostic investigation?
A) Immediate insertion of a standard 16F Foley catheter
B) Retrograde Urethrography (RUG)
C) Urgent diagnostic cystoscopy
D) Transabdominal pelvic ultrasound
Correct Answer: B
Explanation: Signs such as blood at the urethral meatus and a high-riding prostate indicate a urethral injury. A retrograde urethrogram must be performed to confirm the diagnosis before any blind attempts at catheterization.
Q39. A 60-year-old male with a history of chronic smoking presents with a 2-month history of painless gross hematuria. He denies any fever, dysuria, or flank pain. A urine culture is negative for bacterial growth. What is the most likely diagnosis that must be investigated?
A) Acute Nephritic Syndrome
B) Nephrolithiasis
C) Bladder Carcinoma (Urothelial Cancer)
D) Benign Prostatic Hyperplasia
Correct Answer: C
Explanation: Painless gross hematuria in an older individual with a history of smoking is considered highly indicative of a urological malignancy, most commonly bladder cancer, until proven otherwise.
Q40. A 22-year-old male presents with severe, sudden-onset abdominal pain. On physical examination, his abdomen is rigid, board-like, and has generalized rebound tenderness. A plain erect chest radiograph reveals a crescent of free air beneath the right hemidiaphragm (pneumoperitoneum). What is the immediate definitive management?
A) High-dose intravenous proton pump inhibitors and observation
B) Emergent exploratory laparotomy
C) Nasogastric tube decompression and a repeat X-ray in 12 hours
D) Barium swallow contrast study
Correct Answer: B
Explanation: Pneumoperitoneum in a patient with a rigid abdomen indicates a perforated hollow viscus, which is a surgical emergency requiring immediate exploratory laparotomy.
3. Pediatrics & Child Health
Q41. An 18-month-old child is brought to a rural health center with severe wasting, bilateral pitting pedal edema extending to the lower legs, and a "flaky paint" dermatosis. The child appears lethargic and apathetic. Based on these findings, what is the most accurate nutritional diagnosis?
A) Marasmus
B) Kwashiorkor
C) Nutritional Marasmic-Kwashiorkor
D) Severe Stunting
Correct Answer: B
Explanation: The hallmark sign of Kwashiorkor is bilateral pitting pedal edema. It is often accompanied by regulative dermatological signs ("flaky paint" dermatosis) due to severe acute protein malnutrition.
Q42. A 4-year-old boy is brought to the pediatric emergency unit with a 3-day history of high fever, barking cough, and progressive difficulty breathing. On physical examination, you note inspiratory stridor at rest, subcostal chest indrawings, and mild agitation. What is the most likely diagnosis?
A) Acute Bronchiolitis
B) Foreign Body Aspiration
C) Laryngotracheobronchitis (Croup)
D) Bronchial Asthma
Correct Answer: C
Explanation: Viral laryngotracheobronchitis, or Croup, classically presents in young children with a prodrome of fever, a distinctive barking cough, and inspiratory stridor caused by subglottic airway edema.
Q43. A 12-year-old girl presents with migratory polyarthritis affecting her knees and elbows, a new-onset cardiac murmur, and choreiform movements. She had a severe sore throat 3 weeks ago that went untreated. Which organism is responsible for initiating this disease process?
A) Staphylococcus aureus
B) Group A Beta-Hemolytic Streptococcus
C) Streptococcus pneumoniae
D) Haemophilus influenzae
Correct Answer: B
Explanation: Acute Rheumatic Fever is an autoimmune, non-suppurative inflammatory complication that occurs a few weeks following an untreated pharyngeal infection caused by Group A Beta-Hemolytic Streptococcus (Streptococcus pyogenes).
Q44. A 9-month-old infant is brought to the clinic due to poor feeding and lethargy. The mother reports the infant has had watery diarrhea for 4 days. On exam, the child is lethargic, has deeply sunken eyes, and the skin pinch goes back very slowly (> 2 seconds). According to IMNCI guidelines, how should this child’s dehydration status be classified?
A) No Dehydration
B) Some Dehydration
C) Severe Dehydration
D) Persistent Diarrhea
Correct Answer: C
Explanation: Under IMNCI guidelines, a child presenting with two or more signs among lethargy, sunken eyes, and a very slow skin pinch (> 2 seconds) is classified under Severe Dehydration and requires urgent IV fluids.
Q45. A 3-week-old male infant is brought to the hospital with a history of persistent, non-bilious projectile vomiting immediately after every feeding. On physical examination, a small, firm, mobile olive-shaped mass is felt in the right upper quadrant of the abdomen. What is the most likely metabolic abnormality expected in this child?
A) Hypokalemic, hypochloremic metabolic alkalosis
B) Hyperkalemic, hyperchloremic metabolic acidosis
C) Normal anion gap metabolic acidosis
D) Hyponatremic respiratory acidosis
Correct Answer: A
Explanation: Persistent loss of gastric hydrochloric acid and potassium from vomiting in hypertrophic pyloric stenosis leads to systemic depletion of hydrogen, chloride, and potassium ions, presenting as a hypokalemic, hypochloremic metabolic alkalosis.
Q46. A 10-year-old child presents with a 2-week history of generalized body swelling. Physical examination shows severe periorbital and pedal edema. Urinalysis reveals 4+ proteinuria and no red blood cells. Serum albumin is low at 1.8 g/dL. What is the most likely histological diagnosis for this child’s condition?
A) Membranous Nephropathy
B) Minimal Change Disease
C) Focal Segmental Glomerulosclerosis (FSGS)
D) Rapidly Progressive Glomerulonephritis (RPGN)
Correct Answer: B
Explanation: Minimal change disease is the most common cause of nephrotic syndrome in children, characterized by normal appearances on light microscopy and podocyte foot process effacement on electron microscopy.
Q47. A 14-month-old child is brought to the outpatient clinic with a 3-day history of dry cough and low-grade fever, followed by the sudden onset of an audible wheeze. On exam, the child is tachypneic with asymmetric chest expansion and decreased breath sounds localized to the right lung field. Expiratory wheezing is heard primarily on the right side. What is the most likely diagnosis?
A) Acute Viral Bronchiolitis
B) Foreign Body Aspiration
C) Lobar Bacterial Pneumonia
D) Pulmonary Tuberculosis
Correct Answer: B
Explanation: The sudden onset of a localized unilateral wheeze with asymmetric breath sounds in a toddler is highly characteristic of an aspirated foreign body lodged in a main bronchus.
Q48. A 4-year-old girl is brought with a history of fever and a rash for 4 days. On examination, she has conjunctival injection, a maculopapular rash starting from the face and spreading downwards, a runny nose, and small white spots on an erythematous base inside her buccal mucosa opposite the lower molars. What is the most likely diagnosis?
A) Scarlet Fever
B) Measles (Rubeola)
C) Rubella (German Measles)
D) Varicella (Chickenpox)
Correct Answer: B
Explanation: The combination of the “3 Cs” (cough, coryza, conjunctivitis), a maculopapular rash that spreads cephalocaudally, and pathognomonic Koplik spots establishes a clinical diagnosis of Measles.
Q49. A 4-year-old boy is brought to the emergency department with a 2-day history of high fever, sore throat, and severe difficulty swallowing. The child is sitting forward with his neck extended, drooling saliva, and appears anxious and toxic. He has an audible inspiratory stridor. What is the most critical immediate step in management?
A) Examine the pharynx thoroughly with a tongue depressor to check for an abscess
B) Secure the airway immediately in a controlled environment (OR or ICU)
C) Obtain a definitive lateral neck X-ray to look for a ‘thumbprint’ sign
D) Administer empirical intramuscular Penicillin and re-evaluate in 12 hours
Correct Answer: B
Explanation: The presentation indicates acute epiglottitis. The primary priority is securing a definitive airway under controlled conditions due to the high risk of sudden, complete respiratory obstruction. Direct throat examination with a tongue depressor is strictly contraindicated.
Q50. A 5-year-old girl is brought to the pediatric clinic because her parents noticed an abdominal mass. On physical examination, a large, smooth, firm mass is palpated on the left flank that does not cross the midline. The child is hypertensive but otherwise asymptomatic. A urinalysis reveals microscopic hematuria. What is the most likely diagnosis?
A) Neuroblastoma
B) Wilms Tumor (Nephroblastoma)
C) Polycystic Kidney Disease
D) Hydronephrosis
Correct Answer: B
Explanation: Wilms tumor is the most common primary renal malignant tumor in children, presenting as a smooth, firm, unilateral flank mass that typically respects the midline.