KMU Past Paper Practice

Question: A 37-year-old man reports recurrent waves of central abdominal pain. Between episodes he is relatively comfortable, but during each episode the pain intensifies with visible abdominal movement. Which mechanism best explains this pattern?

Correct Answer: Peristaltic contractions against a narrowed bowel segment

Explanation: Colicky pain occurs when bowel contractions attempt to propel contents past a blockage. Peritoneal inflammation more often produces persistent pain aggravated by movement.

Question: A 79-year-old woman taking long-term corticosteroids develops new abdominal pain and reduced appetite. She has mild tenderness without marked guarding, but her pulse is 112/min and she appears unwell. Which interpretation is safest?

Correct Answer: An older immunosuppressed patient may have muted peritoneal signs despite serious pathology

Explanation: Advanced age and immunosuppression can blunt fever, tenderness and guarding. Tachycardia and clinical deterioration warrant urgent assessment despite subtle abdominal findings.

Question: A 25-year-old woman reports intermittent right-sided abdominal pain with burning micturition and urinary frequency. She has no guarding and remains afebrile. Which initial test most directly evaluates an important alternative to appendicitis?

Correct Answer: Urinalysis

Explanation: Urinalysis helps identify urinary infection or hematuria suggestive of a stone. Urinary symptoms require a focused urinary differential rather than automatic attribution to appendicitis.

Question: A 13-year-old girl has fever and right lower abdominal pain. During gentle flexion and internal rotation of her flexed right hip, the pain increases. Which appendix position is most likely to account for this sign?

Correct Answer: Pelvic adjacent to obturator internus

Explanation: Internal rotation of the flexed hip stretches the obturator internus. An inflamed pelvic appendix may irritate that muscle, producing a positive obturator sign.

Question: A 17-year-old boy has evolving right iliac fossa pain and localized tenderness. His initial white blood cell count and C-reactive protein are within reference limits. What is the most appropriate interpretation?

Correct Answer: An early appendicitis diagnosis remains possible and requires clinical reassessment

Explanation: Inflammatory markers may be normal early in appendicitis. Clinical trajectory, examination and appropriate imaging or observation remain important.

Question: A pregnant woman at 19 weeks’ gestation has persistent focal right-sided abdominal pain. Ultrasonography cannot visualize the appendix and clinical suspicion remains significant. Which next imaging modality is generally favored when readily available?

Correct Answer: MRI of the abdomen without gadolinium contrast

Explanation: MRI without gadolinium can clarify suspected appendicitis after nondiagnostic ultrasound while avoiding ionizing radiation. Urgent surgical review should not be delayed in deterioration.

Question: A 7-year-old child with recent appendiceal symptoms now has fever, a tender right iliac fossa mass and imaging showing a localized periappendiceal collection. The child is stable without generalized peritonitis. Which treatment principle best fits this finding?

Correct Answer: Provide antibiotics and specialist assessment for possible image-guided drainage

Explanation: An appendiceal abscess is a contained infectious complication. Antibiotics and surgical assessment are required; accessible collections may be drained depending on size and clinical response.

Question: A 5-year-old girl is being evaluated for possible appendicitis. Her caregivers report vomiting and diffuse abdominal discomfort, but there has been no clear migration of pain. What is the best clinical conclusion?

Correct Answer: Young children can present atypically, so serial examination and appropriate testing remain important

Explanation: Younger children may not describe pain accurately and may present with nonspecific vomiting or diffuse tenderness. Classic migration is helpful but not essential to diagnosis.

Question: A 45-year-old man develops frequent large-volume vomiting and epigastric distension early in the course of mechanical bowel obstruction, with relatively little lower abdominal distension. Which site is most compatible with this pattern?

Correct Answer: Proximal small intestine

Explanation: Proximal small bowel obstruction causes early prominent vomiting and relatively modest distension. Distal obstruction tends to produce more marked distension and later vomiting.

Question: A 62-year-old man with colicky abdominal pain and vomiting passed a small stool after his symptoms began. Examination still reveals distension and dehydration. Which statement best guides assessment?

Correct Answer: Residual distal bowel contents may pass early, so obstruction remains possible

Explanation: Contents located distal to a new obstruction can still be passed initially. Stool passage early in the illness does not exclude significant obstruction.

Question: A 56-year-old woman develops diffuse abdominal distension and reduced bowel sounds two days after abdominal surgery. CT demonstrates widespread bowel dilatation without a clear transition point. Which mechanism is most consistent with the findings?

Correct Answer: Postoperative impairment of intestinal motility (ileus)

Explanation: Postoperative ileus is functional failure of propulsion and usually lacks a focal transition point. Mechanical obstruction is more likely when dilated bowel abruptly meets decompressed bowel.

Question: A patient with suspected obstruction has a plain abdominal radiograph reported as nondiagnostic. He continues to vomit and has progressive distension. What is the most appropriate next interpretation?

Correct Answer: CT can be appropriate because plain films may miss obstruction or complications

Explanation: Plain radiographs have limited sensitivity and do not reliably assess the cause or bowel viability. CT, when appropriate, helps identify a transition point and complications.

Question: A 68-year-old patient with bowel obstruction has CT showing a loop of bowel obstructed at two adjacent points, with mesenteric edema and reduced bowel-wall enhancement. Which complication should be prioritized?

Correct Answer: Closed-loop obstruction with threatened bowel viability

Explanation: Obstruction at two points traps a bowel segment in a closed loop. Edema and reduced enhancement raise concern for strangulation and ischemia requiring urgent surgery.

Question: A 50-year-old man develops abrupt severe abdominal pain and involuntary guarding. An erect chest radiograph shows no free subdiaphragmatic air. The surgical team remains concerned about perforation. Which conclusion is best?

Correct Answer: Perforation can still be present; CT may provide better detection in a stable patient

Explanation: A plain radiograph may not demonstrate small quantities of intraperitoneal gas. Persistent peritoneal signs warrant urgent surgical assessment; CT is more sensitive when the patient is stable.

Question: A 64-year-old woman has generalized peritonitis and suspected bowel perforation. Blood pressure and urine output are improving after fluids. Which additional therapy addresses bacterial contamination while definitive source control is arranged?

Correct Answer: Intravenous broad-spectrum antibiotics active against enteric organisms

Explanation: Perforation introduces gastrointestinal organisms into the peritoneal cavity. Early IV antibiotics covering likely enteric pathogens complement resuscitation and timely surgical source control.

Question: A 43-year-old man is recovering after surgical treatment of perforated bowel. Five days later he develops persistent fever, increasing abdominal discomfort and leukocytosis. Which postoperative complication should be considered?

Correct Answer: Intra-abdominal abscess or persistent infected collection

Explanation: Fever and worsening abdominal signs after source control raise suspicion of residual infection or an intra-abdominal abscess. Reassessment and targeted imaging may be required.

Question: A 39-year-old man reports an intermittent groin bulge after lifting heavy objects. No swelling is apparent during examination while supine, and there are no acute symptoms. Which approach can help establish the diagnosis?

Correct Answer: Examine while standing and coughing, with ultrasound if findings remain equivocal

Explanation: Some reducible hernias become visible only with standing or raised intra-abdominal pressure. Ultrasound can help when the clinical examination remains uncertain.

Question: A 14-month-old child has an intermittent reducible groin swelling extending toward the scrotum. The child is currently comfortable. Which management principle is most appropriate?

Correct Answer: Elective pediatric surgical referral because incarceration is a significant risk

Explanation: Pediatric inguinal hernias commonly reflect a patent processus vaginalis and generally require surgical repair because they can incarcerate even when initially reducible.

Question: A 59-year-old man has a small reducible inguinal hernia causing minimal discomfort. He has no obstruction, can reduce the bulge easily and prefers to avoid immediate surgery. Which option may be reasonable after shared decision-making?

Correct Answer: Watchful waiting with advice about worsening pain, irreducibility and obstruction

Explanation: Selected adult men with minimally symptomatic reducible inguinal hernias may choose watchful waiting after discussing the risk of progression and return precautions.

Question: A 61-year-old woman presents with a small groin bulge that is sometimes visible below the inguinal ligament. It is currently reducible and not painful. Why is timely surgical assessment important even without acute obstruction?

Correct Answer: Femoral hernias are common in this context and have an important risk of incarceration and strangulation

Explanation: Femoral hernias may be mistaken for inguinal swellings in women. Their narrow neck makes incarceration and strangulation important concerns, so timely specialist assessment is warranted.