Gastrointestinal Surgery Practice Questions

Q: A wide mouth Meckel's diverticulum is found incidentally during laparotomy. What is the recommended treatment?

Leave as is. **Explanation:** The management of an incidentally discovered Meckel’s diverticulum (MD) remains a classic debate in surgery, but current consensus for NEET-PG follows the principle of **conservative management** for asymptomatic, wide-mouthed diverticula. **Why "Leave as is" is correct:** A **wide-mouthed** diverticulum is at very low risk for complications like diverticulitis or obstruction because intestinal contents can flow freely in and out, preventing stasis. In adults, the risk of developing complications from an asymptomatic MD is approximately 4–6%, whereas the risk of postoperative complications (adhesions, leak) from an unnecessary resection is often higher. Therefore, if the diverticulum is asymptomatic, wide-based, and feels soft (no palpable ectopic tissue), it should be left alone. **Why other options are incorrect:** * **A & C (Resection/Ligation):** Simple diverticulectomy or ligation is reserved for symptomatic cases (like diverticulitis) or high-risk incidental cases (narrow base, long length >2cm, or presence of palpable nodules). * **D (Resection with ileum):** Formal wedge resection or segmental ileal resection is mandatory only if there is **bleeding** (to ensure the ectopic gastric mucosa in the adjacent ileum is removed) or if the base is inflamed/gangrenous. **High-Yield Clinical Pearls for NEET-PG:** 1. **Rule of 2s:** 2% population, 2 inches long, 2 feet from ileocecal valve, 2% symptomatic, 2 types of ectopic tissue (Gastric > Pancreatic). 2. **Most common presentation:** Painless lower GI bleed in children; Intestinal obstruction in adults. 3. **Incidental Resection Criteria:** Resect if the patient is 2cm long, has a narrow neck, or feels thickened (suggesting ectopic mucosa). 4. **Technetium-99m Pertechnetate scan:** The investigation of choice for bleeding MD (detects ectopic gastric mucosa).

Q: Water loss is severe if intestinal obstruction occurs at which level?

First part of the duodenum. **Explanation:** The severity of fluid and electrolyte loss in intestinal obstruction is inversely proportional to the distance of the obstruction from the stomach. **Why the First Part of the Duodenum is Correct:** Obstruction at the **first part of the duodenum** (proximal obstruction) leads to rapid and severe water loss primarily through **profuse vomiting**. At this high level, the stomach and proximal duodenum cannot reabsorb any of the 8–10 liters of daily secretions (saliva, gastric juice, bile, and pancreatic juice). Because there is no distal intestinal surface area available for reabsorption, dehydration occurs rapidly, often accompanied by **hypochloremic, hypokalemic metabolic alkalosis**. **Analysis of Incorrect Options:** * **Third part of the duodenum & Mid-jejunum:** While these are still considered "high" obstructions, a small portion of the duodenum or jejunum remains proximal to the obstruction, allowing for a minimal amount of fluid absorption compared to a first-part obstruction. * **Ileum:** This is a **distal (low) small bowel obstruction**. In these cases, the majority of the small intestine is available to reabsorb secretions. Vomiting occurs much later, and the primary clinical feature is significant abdominal distension rather than immediate, severe dehydration. **High-Yield Clinical Pearls for NEET-PG:** * **Proximal Obstruction:** Characterized by early, profuse vomiting, minimal distension, and rapid onset of dehydration/shock. * **Distal Obstruction:** Characterized by late vomiting (may be feculent), marked abdominal distension, and multiple air-fluid levels on X-ray. * **Metabolic Profile:** High intestinal obstruction typically results in metabolic alkalosis (loss of H+ and Cl-), whereas low intestinal obstruction may eventually lead to metabolic acidosis due to dehydration and sepsis.

Q: Paralytic ileus is characterized by which of the following findings, except?

Loops of intestine are not seen due to loss of peristalsis. **Explanation:** Paralytic ileus is a state of functional intestinal obstruction where there is a failure of peristalsis without a mechanical blockage. **1. Why Option D is the Correct Answer (The Exception):** In paralytic ileus, the loops of the intestine are **clearly visible** on imaging (X-ray or CT). Because peristalsis has ceased, the bowel becomes distended with gas and fluid. These dilated, gas-filled loops are a hallmark radiological finding. The statement that "loops are not seen" is factually incorrect, making it the right choice for an "except" question. **2. Analysis of Incorrect Options:** * **Option A (No bowel sounds):** Since there is a global absence of peristaltic activity (aperistalsis), auscultation typically reveals a "silent abdomen." This is a classic clinical feature. * **Option B (No passage of flatus):** Because the functional movement of the gut has stopped, gas and feces cannot be propelled distally, leading to absolute constipation and failure to pass flatus. * **Option C (Gas-filled loops with fluid levels):** On an erect abdominal X-ray, paralytic ileus shows generalized dilatation of both the small and large bowel. Multiple air-fluid levels are seen at the same height in the same loop (unlike the "step-ladder" pattern of mechanical obstruction). **3. Clinical Pearls for NEET-PG:** * **Most common cause:** Post-operative state (Physiological ileus). Normal recovery: Small bowel (0–24h) > Stomach (24–48h) > Colon (48–72h). * **Electrolyte Imbalance:** Hypokalemia is the most common metabolic cause of paralytic ileus. * **Radiology:** Characterized by "Gas in the Rectum" (often absent in complete mechanical obstruction). * **Management:** Usually conservative (NPO, IV fluids, nasogastric decompression, and correction of electrolytes). Avoid opioids as they worsen the condition.

Q: A 50-year-old woman presented with bilateral solid ovarian tumors, ascites, and an ulcerative growth in the pyloric region of the stomach. What is the most likely diagnosis?

Gastric adenocarcinoma. ### Explanation The clinical presentation described is a classic case of **Krukenberg Tumor**, which refers to a metastatic signet-ring cell carcinoma of the ovary, most commonly originating from a primary site in the **stomach (Gastric Adenocarcinoma)**. **Why Gastric Adenocarcinoma is correct:** In this patient, the "ulcerative growth in the pyloric region" represents the primary malignancy. Krukenberg tumors are characterized by **bilateral, solid ovarian enlargement** resulting from retrograde lymphatic spread or transcoelomic seeding. While the colon, breast, and appendix can also be primary sites, the stomach is the most frequent source (approx. 70% of cases). The presence of ascites further suggests peritoneal dissemination. **Why the other options are incorrect:** * **Ovarian malignancy:** While the patient has ovarian tumors, the presence of a gastric pyloric mass indicates that the ovarian involvement is secondary (metastatic) rather than primary. * **Uterine malignancy:** Uterine cancers typically spread to pelvic lymph nodes or the lungs; they do not commonly present with a primary gastric mass and bilateral solid ovarian tumors. * **Duodenal adenocarcinoma:** This is significantly rarer than gastric cancer and is not the classic primary site associated with the eponymous Krukenberg tumor. **Clinical Pearls for NEET-PG:** * **Histology:** Look for **Signet-ring cells** (mucin-filled cytoplasm displacing the nucleus to the periphery). * **Route of spread:** Most commonly believed to be **retrograde lymphatic spread**, though transcoelomic seeding occurs. * **Sister Mary Joseph Nodule:** Another sign of gastric metastasis, presenting as a palpable nodule at the umbilicus. * **Virchow’s Node:** Left supraclavicular lymphadenopathy, often the first sign of hidden gastric malignancy.

Q: In pyloric stenosis, the following changes are seen?

Hypokalemic hyponatremic alkalosis. ### Explanation In **Infantile Hypertrophic Pyloric Stenosis (IHPS)**, the hallmark metabolic derangement is **Hypokalemic, Hypochloremic, Hyponatremic Metabolic Alkalosis with Paradoxical Aciduria**. **Why Option A is Correct:** 1. **Vomiting:** Persistent non-bilious vomiting leads to the loss of gastric juice rich in **Hydrogen (H+)**, **Chloride (Cl-)**, and **Water**. 2. **Alkalosis:** The loss of H+ ions directly causes metabolic alkalosis. 3. **Hyponatremia & Hypochloremia:** Loss of NaCl in vomitus and subsequent volume depletion leads to low sodium and chloride levels. 4. **Hypokalemia:** This occurs due to two reasons: * Direct loss of Potassium (K+) in vomitus. * **Renal Compensation:** To conserve volume, the kidneys activate the Renin-Angiotensin-Aldosterone System (RAAS). Aldosterone reabsorbs Na+ at the expense of excreting K+ and H+ into the urine. **Why Other Options are Incorrect:** * **B & D (Hyperkalemia/Hyperchloremic Acidosis):** These are seen in conditions like Renal Tubular Acidosis or Addison’s disease. In pyloric stenosis, Cl- and K+ are always lost, never elevated. * **C (Acidosis):** Vomiting gastric acid (HCl) inherently leads to a rise in pH (alkalosis), not a drop (acidosis). **High-Yield Clinical Pearls for NEET-PG:** * **Paradoxical Aciduria:** Initially, the kidney excretes bicarbonate (alkaline urine). As dehydration worsens, the kidney prioritizes Na+ reabsorption. To save Na+, it secretes H+ ions into the urine, making the urine **acidic** despite systemic **alkalosis**. * **Fluid of Choice:** Normal Saline (0.9% NaCl) with added Potassium. **Never** use Ringer’s Lactate as the liver converts lactate to bicarbonate, worsening the alkalosis. * **Diagnosis:** Ultrasound is the gold standard (Muscle thickness >4mm, Length >14mm). Look for the "Target sign" or "Donut sign."

Question 1

A 55-year-old man presents with a 2-day history of left lower quadrant (LLQ) abdominal pain, associated with constipation. Physical examination reveals LLQ tenderness and fullness, a leukocyte count of 22,000, and a temperature of 101.5°F. Which diagnostic study would be best to evaluate this patient?

Accepted Answer

Computed tomography (CT) of the abdomen/pelvis with oral and intravenous contrast

Answer

Diagnostic laparoscopy

Answer

Barium enema

Answer

Plain abdominal roentgenogram

Question 2

The most common complication of vagotomy is:

Accepted Answer

Diarrhea

Answer

Dryness of mouth

Answer

Tachycardia

Answer

Bleaching

Question 3

A wide mouth Meckel's diverticulum is found incidentally during laparotomy. What is the recommended treatment?

Accepted Answer

Leave as is

Answer

Resection of the diverticulum

Answer

Ligate at the base

Answer

Resection with a portion of the ileum

Question 4

Water loss is severe if intestinal obstruction occurs at which level?

Accepted Answer

First part of the duodenum

Answer

Third part of the duodenum

Answer

Mid jejunum

Answer

Ileum

Question 5

Paralytic ileus is characterized by which of the following findings, except?

Accepted Answer

Loops of intestine are not seen due to loss of peristalsis

Answer

No bowel sounds on auscultation

Answer

No passage of flatus

Answer

Gas-filled loops of intestine with multiple fluid levels

Question 6

Which of the following features characterize acute intestinal obstruction?

Accepted Answer

In colonic obstruction, distension is more common than vomiting.

Answer

Vomiting is common in duodenal obstruction.

Answer

Pain after each attack of vomiting is characteristic of ileal obstruction.

Answer

Colicky pain changing to steady pain indicates strangulation.

Question 7

A 50-year-old woman presented with bilateral solid ovarian tumors, ascites, and an ulcerative growth in the pyloric region of the stomach. What is the most likely diagnosis?

Accepted Answer

Gastric adenocarcinoma

Answer

Ovarian malignancy

Answer

Uterine malignancy

Answer

Duodenal adenocarcinoma

Question 8

In pyloric stenosis, the following changes are seen?

Accepted Answer

Hypokalemic hyponatremic alkalosis

Answer

Hyperkalemia

Answer

Acidosis with hyponatremic alkalosis

Answer

Hyperchloremic acidosis

Question 9

What is the treatment of choice for perforation of the cervical esophagus?

Accepted Answer

Cervical exploration and drainage of the superior mediastinum, along with the use of antibiotics

Answer

Bed rest and use of antibiotics

Answer

Nasogastric intubation and use of antibiotics

Answer

Resection and colonic interposition

Question 10

A 60-year-old male is diagnosed with carcinoma of the stomach. A CT scan of the abdomen reveals a 4x4 cm mass in the antrum with involvement of celiac and right gastric nodes. What is the management of choice?

Accepted Answer

Subtotal gastrectomy

Answer

Total gastrectomy

Answer

Palliative care

Answer

Chemotherapy

Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery — MCQs

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