Gastrointestinal Surgery — MCQs
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A thirty-year-old male presents with epigastric pain radiating to the back. He reports pain that wakes him at night and is relieved by food. His past medical history includes two episodes of perforated duodenal ulcers treated surgically with omental patches. Post-operatively, his symptoms have been managed with proton pump inhibitors and analgesics. What is the most likely diagnosis?
Which one of the following is not a treatment for gastroesophageal variceal hemorrhage?
A 65-year-old male has an ulcer in the lesser curvature. Biopsy is negative for malignancy, and the ulcer has not healed after 6 weeks of H2 blocker therapy. What is the next appropriate treatment?
What is the most common complication of ERCP?
A 36-year-old man presents with weight loss and a large palpable tumor in the upper abdomen. Endoscopy reveals an intact gastric mucosa without signs of carcinoma. Multiple biopsies show normal gastric mucosa. A UGI study shows a mass in the stomach. At surgery, a 3-kg mass is removed. The procedure requires the removal of the left side of the transverse colon. What is the most likely diagnosis?
What is the most common site for volvulus?
All of the following signs are seen in acute appendicitis except?
What complication commonly occurs in an anterior duodenal ulcer?
Resection of which intestinal segment causes marked electrolyte imbalance?
Which of the following statements about inflammatory bowel disease (IBD) is true?
Gastrointestinal Surgery Indian Medical PG Practice Questions and MCQs
Question 441: A thirty-year-old male presents with epigastric pain radiating to the back. He reports pain that wakes him at night and is relieved by food. His past medical history includes two episodes of perforated duodenal ulcers treated surgically with omental patches. Post-operatively, his symptoms have been managed with proton pump inhibitors and analgesics. What is the most likely diagnosis?
- A. Gastric ulcer
- B. Atrophic gastritis
- C. Duodenal ulcer (Correct Answer)
- D. Chronic pancreatitis
Explanation: **Explanation:** The clinical presentation is classic for a **Duodenal Ulcer (DU)**. The patient’s symptoms—epigastric pain radiating to the back, nocturnal pain (which occurs when the stomach is empty), and pain relieved by food intake—are hallmark features. The history of recurrent perforations despite surgical repair (omental patch) and PPI therapy suggests a refractory or chronic acid-peptic disease process. **Why the correct answer is right:** * **Pain-Food-Relief Pattern:** In DU, food buffers the gastric acid, providing temporary relief. Pain typically occurs 2–3 hours after meals or at night when acid secretion is unopposed. * **Recurrence:** DU has a high recurrence rate if the underlying cause (e.g., *H. pylori* or hypergastrinemia) is not addressed. **Why incorrect options are wrong:** * **Gastric Ulcer:** Pain is typically aggravated by food (Pain-Food-Agony) and often leads to weight loss due to sitophobia (fear of eating). * **Atrophic Gastritis:** This involves mucosal atrophy and hypochlorhydria (low acid), which does not present with the classic "hunger pain" or a history of perforations. * **Chronic Pancreatitis:** While it causes epigastric pain radiating to the back, the pain is usually exacerbated by food (especially fatty meals) and is often associated with steatorrhea or weight loss, not relief by food. **NEET-PG High-Yield Pearls:** 1. **Most common site for DU:** First part of the duodenum (Bulbar region). 2. **Most common site for perforation:** Anterior wall of the duodenum. 3. **Most common site for bleeding:** Posterior wall (involvement of the Gastroduodenal artery). 4. **Zollinger-Ellison Syndrome (ZES):** Always suspect ZES in patients with recurrent, refractory, or multiple post-bulbar ulcers.
Question 442: Which one of the following is not a treatment for gastroesophageal variceal hemorrhage?
- A. Sclerotherapy
- B. Sengstaken tube
- C. Transjugular intrahepatic portosystemic shunt
- D. Gastric freezing (Correct Answer)
Explanation: **Explanation:** The management of gastroesophageal variceal hemorrhage focuses on achieving immediate hemostasis and reducing portal pressure. **Why Gastric Freezing is the Correct Answer:** **Gastric freezing** is an obsolete technique introduced in the 1960s intended to treat **duodenal ulcers** by reducing acid secretion through mucosal cooling. It has no role in the management of portal hypertension or variceal bleeding. In fact, it was found to be ineffective and associated with significant complications like gastric necrosis, leading to its abandonment. **Analysis of Incorrect Options:** * **Sclerotherapy (Endoscopic Sclerotherapy - EST):** This involves injecting a sclerosant (e.g., ethanolamine oleate) into or around the varices to induce thrombosis and fibrosis. While Endoscopic Variceal Ligation (EVL) is now the preferred first-line treatment, EST remains a valid therapeutic option. * **Sengstaken-Blakemore Tube:** This is a form of **balloon tamponade** used as a temporary "bridge" therapy to control massive, life-threatening variceal bleeding when endoscopic therapy fails or is unavailable. * **Transjugular Intrahepatic Portosystemic Shunt (TIPS):** This is a radiologic procedure that creates a low-resistance channel between the hepatic vein and the portal vein. It effectively lowers portal pressure and is indicated for refractory variceal bleeding. **High-Yield Clinical Pearls for NEET-PG:** * **Drug of Choice (Acute Bleed):** Terlipressin (Somatostatin/Octreotide are alternatives). * **Procedure of Choice (Acute Bleed):** Endoscopic Variceal Ligation (EVL/Banding). * **Prophylaxis:** Non-selective beta-blockers (Propranolol/Nadolol) are used for primary and secondary prophylaxis. * **TIPS Complication:** The most common significant complication after TIPS is **Hepatic Encephalopathy** due to the bypassing of liver detoxification.
Question 443: A 65-year-old male has an ulcer in the lesser curvature. Biopsy is negative for malignancy, and the ulcer has not healed after 6 weeks of H2 blocker therapy. What is the next appropriate treatment?
- A. Repeat biopsy
- B. Total gastrectomy
- C. Partial gastrectomy
- D. Continue H2 blocker therapy for another 6 weeks (Correct Answer)
Explanation: ### Explanation **1. Why Option D is Correct:** The management of a gastric ulcer differs significantly from a duodenal ulcer because of the risk of occult malignancy. However, the standard protocol for a benign-appearing gastric ulcer (confirmed by biopsy) is a **12-week trial** of medical therapy before labeling it "refractory." In this case, the patient has only completed 6 weeks of H2 blocker therapy. While Proton Pump Inhibitors (PPIs) are now the first-line treatment, the classic surgical teaching (often tested in NEET-PG) dictates that if an ulcer hasn't healed at 6 weeks, the medical management should be extended to a full 12-week course. Only if the ulcer fails to heal after 12 weeks of compliant therapy is it considered "non-healing" or "refractory," warranting surgical intervention. **2. Why Other Options are Incorrect:** * **Option A (Repeat Biopsy):** While repeat biopsy is mandatory if an ulcer fails to heal after a *full* course of therapy to rule out malignancy, it is premature at 6 weeks if the initial biopsy was negative and the treatment course is incomplete. * **Option B & C (Gastrectomy):** Surgery is indicated only for complications (perforation, hemorrhage, obstruction) or true refractoriness (failure after 12 weeks). Jumping to a partial or total gastrectomy at 6 weeks is an over-treatment for a biopsy-negative ulcer. **3. Clinical Pearls for NEET-PG:** * **Healing Rates:** Most gastric ulcers heal within 8 weeks with PPIs and 12 weeks with H2 blockers. * **Location:** The most common site for a gastric ulcer is the **lesser curvature** (Type I ulcer). * **Rule of Malignancy:** All gastric ulcers must be biopsied (at least 6–8 samples from the ulcer edge) because, unlike duodenal ulcers, they carry a risk of being malignant. * **Refractory Ulcer Definition:** Failure to heal after 12 weeks of H2 blockers or 8 weeks of PPI therapy.
Question 444: What is the most common complication of ERCP?
- A. Acute pancreatitis (Correct Answer)
- B. Perforation
- C. Bleeding
- D. Infection
Explanation: **Explanation:** **Acute Pancreatitis** is the most common complication following Endoscopic Retrograde Cholangiopancreatography (ERCP), occurring in approximately **3% to 10%** of patients. The underlying mechanism involves mechanical trauma to the papilla, hydrostatic injury from contrast injection into the pancreatic duct, or thermal injury during sphincterotomy. Risk factors include female gender, young age, previous post-ERCP pancreatitis (PEP), and difficult cannulation. **Analysis of Incorrect Options:** * **B. Perforation:** Occurs in <1% of cases. It is usually related to sphincterotomy (peri-ampullary) or endoscope-induced trauma (duodenal wall). While serious, it is significantly less frequent than pancreatitis. * **C. Bleeding:** Occurs in about 1–2% of cases, primarily following endoscopic sphincterotomy. It can be immediate or delayed but is less common than inflammatory complications. * **D. Infection:** Includes cholangitis and cholecystitis. These occur in roughly 1% of cases, usually due to incomplete biliary drainage or contaminated equipment. **High-Yield Clinical Pearls for NEET-PG:** * **Definition of PEP:** New or worsened abdominal pain with amylase/lipase levels >3x the upper limit of normal, 24 hours after the procedure, requiring hospitalization. * **Prevention:** Prophylactic **Rectal Indomethacin** or Diclofenac (NSAIDs) is the gold standard for reducing the incidence of PEP. * **Most common cause of death** following ERCP is also complications related to severe acute pancreatitis. * **Diagnostic vs. Therapeutic:** Purely diagnostic ERCP has been largely replaced by MRCP; ERCP is now primarily a **therapeutic** modality.
Question 445: A 36-year-old man presents with weight loss and a large palpable tumor in the upper abdomen. Endoscopy reveals an intact gastric mucosa without signs of carcinoma. Multiple biopsies show normal gastric mucosa. A UGI study shows a mass in the stomach. At surgery, a 3-kg mass is removed. The procedure requires the removal of the left side of the transverse colon. What is the most likely diagnosis?
- A. Gastric cancer
- B. Gastrointestinal stromal tumor (GIST) (Correct Answer)
- C. Choledochoduodenal fistula
- D. Eosinophilic gastroenteritis
Explanation: ### Explanation **1. Why GIST is the Correct Answer:** The clinical presentation points toward a **Gastrointestinal Stromal Tumor (GIST)**, the most common mesenchymal tumor of the GI tract. * **Submucosal Origin:** GISTs arise from the **Interstitial Cells of Cajal**. Because they grow within the wall (intramural) or outward (exophytic), the overlying **gastric mucosa remains intact**. This explains why endoscopy shows normal mucosa and multiple biopsies are negative for malignancy. * **Size and Mass Effect:** GISTs are known for reaching massive sizes (e.g., 3 kg) without causing early obstructive symptoms. * **Local Invasion:** Large GISTs are often locally aggressive. The involvement of the transverse colon in this case suggests direct extension, necessitating a multivisceral resection. **2. Why Other Options are Incorrect:** * **Gastric Cancer (Adenocarcinoma):** This arises from the epithelium. Endoscopy would typically show an ulcerated or fungating mass, and biopsies would be positive for malignant cells. * **Choledochoduodenal Fistula:** This is a communication between the bile duct and duodenum, usually due to gallstones or peptic ulcers. It presents with pneumobilia or cholangitis, not a 3-kg abdominal mass. * **Eosinophilic Gastroenteritis:** This is an inflammatory condition characterized by eosinophilic infiltration of the GI wall. It presents with abdominal pain, diarrhea, or ascites, but does not form large, solid, 3-kg tumors requiring colon resection. **3. High-Yield Clinical Pearls for NEET-PG:** * **Most Common Site:** Stomach (60%), followed by the small intestine (30%). * **Immunohistochemistry (IHC):** The most specific marker is **CD117 (c-KIT)**; **DOG-1** is also highly sensitive. * **Genetic Mutation:** Most cases involve a mutation in the **c-KIT proto-oncogene**. * **Treatment:** Surgical resection with negative margins (no lymphadenectomy needed as they spread hematogenously). **Imatinib** (Tyrosine Kinase Inhibitor) is the drug of choice for metastatic or unresectable cases.
Question 446: What is the most common site for volvulus?
- A. Caecum
- B. Stomach
- C. Proximal jejunum
- D. Sigmoid colon (Correct Answer)
Explanation: **Explanation:** **Sigmoid colon (Option D)** is the most common site for volvulus, accounting for approximately 60-75% of all cases of colonic volvulus. The underlying anatomical predisposition is a **long, redundant sigmoid colon with a narrow mesenteric base**. When this narrow base undergoes torsion, it leads to a closed-loop obstruction. This condition is particularly common in elderly, institutionalized patients or those with chronic constipation, as a heavy, feces-loaded colon acts as a pivot for rotation. **Analysis of Incorrect Options:** * **Caecum (Option A):** This is the second most common site (approx. 25-30%). It occurs due to incomplete fixation of the ascending colon to the posterior abdominal wall (hypermobile caecum). It typically affects a younger age group compared to sigmoid volvulus. * **Stomach (Option B):** Gastric volvulus is rare and usually associated with paraesophageal hernias or diaphragmatic defects. It presents with Borchardt’s triad (epigastric pain, unproductive retching, and inability to pass a nasogastric tube). * **Proximal Jejunum (Option C):** Small bowel volvulus is uncommon in adults unless associated with congenital malrotation or postoperative adhesions. **Clinical Pearls for NEET-PG:** * **Radiology:** Sigmoid volvulus shows the classic **"Coffee Bean sign"** or "Omega sign" on X-ray, with the apex pointing toward the Right Upper Quadrant (RUQ). * **Management:** The initial treatment of choice for stable sigmoid volvulus is **sigmoidoscopic detorsion** (using a flatus tube). However, if gangrene is suspected or detorsion fails, emergency surgery (Hartmann’s procedure) is required. * **Bird's Beak Sign:** Seen on contrast enema at the site of the twist.
Question 447: All of the following signs are seen in acute appendicitis except?
- A. Rovsing's sign (Correct Answer)
- B. Murphy's sign
- C. Boa's sign
- D. Mack Wen's sign
Explanation: **Explanation:** In the context of this question, there appears to be a discrepancy in the provided key. **Rovsing’s sign** is a classic sign of acute appendicitis. However, if the question asks which sign is **NOT** seen in appendicitis, the correct answer should typically be **Murphy’s sign** or **Boa’s sign**, as these are associated with gallbladder disease. Let’s clarify the clinical signs: 1. **Rovsing’s Sign (Seen in Appendicitis):** This is positive when palpation of the Left Lower Quadrant (LLQ) causes pain in the Right Lower Quadrant (RLQ). It occurs because pressure on the left displaces gas toward the cecum, irritating the inflamed peritoneum. 2. **Murphy’s Sign (Not in Appendicitis):** This is the hallmark of **Acute Cholecystitis**. It is positive when a patient catches their breath (inspiratory arrest) upon deep palpation of the right hypochondrium. 3. **Boa’s Sign (Not in Appendicitis):** This refers to hyperesthesia (increased sensitivity) below the right scapula, also characteristic of **Acute Cholecystitis** due to phrenic nerve irritation. 4. **Macewen’s Sign (Mack Wen's):** While traditionally a sign of hydrocephalus (cracked-pot sound on percussion), in some surgical contexts, "MacBurney’s point tenderness" is the intended high-yield association for appendicitis. **Clinical Pearls for NEET-PG:** * **Psoas Sign:** Pain on hip extension (suggests retrocecal appendix). * **Obturator Sign:** Pain on internal rotation of the flexed right hip (suggests pelvic appendix). * **Sherren’s Triangle:** An area of hyperesthesia over the RLQ; if it disappears, it may signify appendix perforation. * **Aron’s Sign:** Epigastric pain on pressure over McBurney’s point.
Question 448: What complication commonly occurs in an anterior duodenal ulcer?
- A. Bleeding
- B. Penetration
- C. Perforation (Correct Answer)
- D. Stricture formation
Explanation: **Explanation:** The location of a duodenal ulcer significantly dictates its clinical presentation and complications. The correct answer is **Perforation** because the anterior wall of the first part of the duodenum is not protected by any solid organ or major vessel [1]. It is covered only by the peritoneum, making it the most common site for free intraperitoneal perforation [1]. **Analysis of Options:** * **Perforation (Correct):** Anterior ulcers are prone to perforating into the general peritoneal cavity, leading to sudden-onset chemical peritonitis and the classic "gas under the diaphragm" on X-ray [1]. * **Bleeding:** This is the most common complication of **posterior** duodenal ulcers. The gastroduodenal artery (GDA) runs directly behind the first part of the duodenum; erosion into this vessel leads to massive hematemesis or melena [1]. * **Penetration:** This also occurs primarily in **posterior** ulcers. Instead of perforating into a free space, the ulcer erodes into adjacent solid organs, most commonly the **pancreas**, often presenting as referred back pain. * **Stricture formation:** While chronic scarring can lead to Gastric Outflow Obstruction (GOO), it is a late complication of chronic cicatrization rather than an acute event specific to the anterior wall [2]. **NEET-PG High-Yield Pearls:** * **Most common site of Peptic Ulcer:** First part of the Duodenum (D1) [2]. * **Anterior Ulcer = Perforation** (Think: "A" for Anterior and "A"ir under diaphragm) [1]. * **Posterior Ulcer = Bleeding** (Think: "P" for Posterior and "P"umping blood from GDA) [1]. * **Most common vessel involved in bleeding DU:** Gastroduodenal Artery [1]. * **Initial Investigation of choice for Perforation:** Erect X-ray Abdomen (showing pneumoperitoneum) [1].
Question 449: Resection of which intestinal segment causes marked electrolyte imbalance?
- A. Duodenum
- B. Jejunum (Correct Answer)
- C. Ileum
- D. Sigmoid
Explanation: **Explanation:** The **jejunum** is the primary site for the bulk absorption of water, electrolytes, and nutrients. Its mucosal surface is characterized by high permeability and a large surface area (due to long villi). Unlike the ileum, the jejunum lacks the "tight" intercellular junctions, making it a "leaky" epithelium. Consequently, resection of the jejunum leads to a rapid loss of fluid and electrolytes, as the remaining bowel often cannot compensate for the high-volume flux that occurs in the proximal small intestine. **Analysis of Options:** * **Jejunum (Correct):** It handles the majority of daily fluid intake and secretions (approx. 5–8 liters). Loss of this segment leads to immediate and **marked electrolyte imbalances** and high-output states. * **Ileum:** While the ileum is critical for Vitamin B12 and bile acid absorption (enterohepatic circulation), it has "tighter" junctions. Resection leads more specifically to megaloblastic anemia and gallstones/steatorrhea rather than acute, massive electrolyte shifts. * **Duodenum:** Although it is the site of iron and calcium absorption, it is rarely resected in isolation. Its short length means its loss is less impactful on total fluid balance compared to the jejunum. * **Sigmoid Colon:** The colon's primary role is water desiccation and storage. Resection (sigmoidectomy) typically has minimal impact on systemic electrolyte balance. **High-Yield Clinical Pearls for NEET-PG:** * **Site of maximum water absorption:** Jejunum. * **Site of Vitamin B12 & Bile Salt absorption:** Terminal Ileum (Resection >100cm leads to severe malabsorption). * **Short Bowel Syndrome:** Usually occurs when <200 cm of functional small bowel remains. * **Adaptation:** The ileum has a greater capacity for structural adaptation (taking over jejunal functions) than the jejunum has for ileal functions.
Question 450: Which of the following statements about inflammatory bowel disease (IBD) is true?
- A. Surgery is the first line of management.
- B. Pouch operation is performed for fulminant ulcerative colitis.
- C. Two percent of Crohn's disease cases undergo malignant changes. (Correct Answer)
- D. Ulcerative colitis does not undergo malignant changes.
Explanation: **Explanation:** **1. Why Option C is Correct:** While Ulcerative Colitis (UC) is more classically associated with malignancy, **Crohn’s Disease (CD)** also carries a significant risk of adenocarcinoma, particularly in the small bowel and colon. Long-standing Crohn’s disease (typically >10 years) increases the risk of colorectal cancer by approximately 2-3% over a patient's lifetime. The risk is highest in patients with extensive colonic involvement (Crohn's colitis). **2. Why the Other Options are Incorrect:** * **Option A:** Surgery is **not** the first line of management for IBD. Medical management (Aminosalicylates, Corticosteroids, Immunomodulators, and Biologics) is the primary approach. Surgery is reserved for complications (perforation, obstruction, hemorrhage) or medical refractoriness. * **Option B:** In **fulminant** ulcerative colitis, the procedure of choice is a **Subtotal Colectomy with End Ileostomy**. An Ileal Pouch-Anal Anastomosis (IPAA/Pouch operation) is contraindicated in the acute/fulminant setting due to high complication rates and poor tissue healing; it is performed as a delayed, elective procedure. * **Option D:** This is false. Ulcerative colitis has a well-documented risk of malignant transformation into colorectal carcinoma. The risk increases with the duration of the disease (approx. 1% per year after 10 years) and the extent of colonic involvement (Pancolitis > Left-sided colitis). **High-Yield Clinical Pearls for NEET-PG:** * **Surgery in UC:** Total Proctocolectomy with IPAA is the "Gold Standard" elective surgery and is considered curative. * **Surgery in CD:** Surgery is **not curative** due to the transmural and "skip lesion" nature of the disease. The goal is "bowel-conserving" surgery (e.g., Stricturoplasty). * **Surveillance:** Screening colonoscopy for cancer is recommended starting 8 years after the onset of symptoms for both UC and Crohn’s colitis.
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Esophageal Disorders
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Gastric Disorders
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Small Intestine Pathology
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Appendicitis
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Inflammatory Bowel Disease
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Intestinal Obstruction
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Gastrointestinal Bleeding
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Diverticular Disease
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Anorectal Disorders
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Colorectal Neoplasms
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Gastrointestinal Stomas
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Bariatric Surgery Principles
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