Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery Indian Medical PG Practice Questions and MCQs

Question 91: What is the most common benign tumor of the esophagus?

A. Lipoma
B. Fibroma
C. Leiomyoma (Correct Answer)
D. Lymphangioma

Explanation: **Explanation:** **Leiomyoma** is the most common benign tumor of the esophagus, accounting for approximately 60–70% of all benign esophageal neoplasms. These tumors arise from the smooth muscle cells of the muscularis propria (most common) or the muscularis mucosae. They are typically found in the distal two-thirds of the esophagus (where smooth muscle predominates) and usually present as a slow-growing, intramural, extramucosal mass. **Analysis of Options:** * **Leiomyoma (Correct):** Its prevalence far exceeds other benign lesions. On barium swallow, it classically appears as a **"smooth, crescent-shaped filling defect"** with sharp borders. * **Lipoma (Incorrect):** These are rare mesenchymal tumors composed of adipose tissue. While they can occur in the GI tract, they are significantly less common than leiomyomas in the esophagus. * **Fibroma (Incorrect):** These are extremely rare in the esophagus and are usually incidental findings. * **Lymphangioma (Incorrect):** These are rare malformations of the lymphatic system and are seldom found in the esophageal wall. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Presentation:** Most are asymptomatic; if large (>5 cm), they cause dysphagia. * **Diagnosis:** Endoscopy shows a smooth bulge with intact overlying mucosa (**"rolling sign"**). * **Contraindication:** **Biopsy is generally avoided** during endoscopy if surgery is planned, as it causes scarring between the tumor and mucosa, making subsequent extramucosal enucleation difficult. * **Treatment of Choice:** Surgical **enucleation** (via thoracotomy or VATS). * **Most common malignant tumor:** Squamous Cell Carcinoma (worldwide) or Adenocarcinoma (increasing in the West/Barrett’s).

Question 92: Which of the following is not a predisposing factor for esophageal carcinoma?

A. Achalasia
B. Scleroderma (Correct Answer)
C. Corrosive intake
D. Barrett's esophagus

Explanation: **Explanation:** The correct answer is **Scleroderma (Systemic Sclerosis)**. While scleroderma causes severe gastroesophageal reflux disease (GERD) due to lower esophageal sphincter (LES) incompetence and aperistalsis, it is not considered a direct independent predisposing factor for esophageal carcinoma. Although chronic GERD in scleroderma can lead to Barrett’s esophagus (which is premalignant), the disease itself is not classified as a classic precursor in the same category as the other options. **Analysis of Incorrect Options:** * **Achalasia:** Long-standing achalasia leads to stasis of food and chronic esophagitis. This increases the risk of **Squamous Cell Carcinoma (SCC)** by approximately 16–33 times, usually occurring years after the initial diagnosis. * **Corrosive Intake:** Ingestion of lye or other caustics causes severe scarring and chronic inflammation. It carries a high risk of **SCC**, often appearing 20–40 years after the initial injury (latent period). * **Barrett’s Esophagus:** This is the most significant risk factor for **Adenocarcinoma**. It involves intestinal metaplasia (replacement of squamous epithelium with columnar epithelium) due to chronic acid exposure. **High-Yield Clinical Pearls for NEET-PG:** * **Most common type worldwide:** Squamous Cell Carcinoma (SCC). * **Most common type in the West/increasing incidence:** Adenocarcinoma. * **Plummer-Vinson Syndrome:** Triad of iron deficiency anemia, glossitis, and esophageal webs; predisposes to SCC of the post-cricoid region. * **Tylosis (Palmar-plantar hyperkeratosis):** An autosomal dominant condition with a nearly 100% lifetime risk of developing SCC. * **Dietary factors:** Nitrosamines, betel nut chewing, and hot beverages are linked to SCC; Obesity and GERD are linked to Adenocarcinoma.

Question 93: Emergency operation is indicated in which of the following conditions?

A. Volvulus (Correct Answer)
B. Obstructed hernia
C. Appendicular perforation with paralytic ileus
D. Toxic megacolon

Explanation: **Explanation** In surgical practice, an **emergency operation** is one that must be performed immediately (usually within minutes to hours) to prevent irreversible ischemia, gangrene, or death. **Why Volvulus is the Correct Answer:** Volvulus (particularly sigmoid or midgut) is a **closed-loop obstruction** where the mesentery twists on its axis. This leads to immediate compromise of the blood supply (strangulation). Because the venous and arterial flow is occluded, gangrene and perforation can occur rapidly. While initial decompression via sigmoidoscopy can be attempted in stable sigmoid volvulus, any sign of ischemia or failure of decompression necessitates an immediate emergency laparotomy to prevent total bowel necrosis. **Analysis of Other Options:** * **Obstructed Hernia:** While serious, an obstructed hernia (where the lumen is blocked but blood supply is intact) is managed urgently. It becomes an emergency only when it progresses to **strangulated hernia**. * **Appendicular Perforation with Paralytic Ileus:** Perforated appendicitis often leads to a localized abscess or generalized peritonitis. In many modern protocols, if the patient is stable, it may be managed with "Ochsner-Sherren" conservative treatment (fluids and antibiotics) or interval appendectomy, rather than immediate surgery. * **Toxic Megacolon:** This is a life-threatening complication of IBD or C. difficile. The primary treatment is **intensive medical management** (IV steroids, fluids, bowel rest). Surgery (Subtotal colectomy) is indicated only if there is no improvement within 24–72 hours or if perforation occurs. **NEET-PG High-Yield Pearls:** * **Sigmoid Volvulus:** Classic "Coffee bean sign" or "Omega sign" on X-ray. * **Cecal Volvulus:** "Bird’s beak" appearance on contrast study; unlike sigmoid, it usually requires immediate surgery as endoscopic reduction rarely works. * **Golden Rule:** Any "closed-loop" obstruction is a surgical emergency due to the high risk of rapid strangulation.

Question 94: What is the most common location for a peptic ulcer?

A. First part of the duodenum (Correct Answer)
B. Lesser curvature of the stomach
C. Gastric antrum
D. Gastro-esophageal junction

Explanation: **Explanation:** Peptic ulcer disease (PUD) refers to acid-induced mucosal breaks in the stomach or duodenum. Statistically, **duodenal ulcers (DU) are significantly more common than gastric ulcers (GU)**, occurring with a frequency ratio of approximately 4:1. **1. Why the First Part of the Duodenum is Correct:** The vast majority (>95%) of duodenal ulcers occur in the **first part of the duodenum**, specifically within 3 cm of the pylorus (the duodenal bulb). This area is most susceptible because it receives the direct "acid spurt" from the stomach before the acidic chyme is neutralized by biliary and pancreatic secretions in the second part of the duodenum. **2. Analysis of Incorrect Options:** * **Lesser Curvature of the Stomach:** This is the most common site for a **gastric ulcer** (specifically Type I ulcers at the *incisura angularis*), but gastric ulcers are overall less frequent than duodenal ulcers. * **Gastric Antrum:** While a common site for *H. pylori* colonization and Type II/III gastric ulcers, it is not the most frequent site for PUD overall. * **Gastro-esophageal Junction:** Ulcers here (Type IV gastric ulcers) are rare and usually associated with specific conditions like Barrett’s esophagus or chronic reflux. **3. NEET-PG High-Yield Pearls:** * **Etiology:** *H. pylori* infection is the most common cause of DU (90-95%) and GU (70-80%). * **Pain Pattern:** DU pain typically occurs 2-3 hours after meals and is **relieved by food** (leading to weight gain). GU pain is often **aggravated by food** (leading to weight loss). * **Complications:** The most common site of **perforation** is the anterior wall of the duodenum. The most common site of **bleeding** is the posterior wall (due to erosion of the Gastroduodenal Artery).

Question 95: Interval cholecystectomy surgery is classified as which type of surgical wound?

A. Clean
B. Clean contaminated (Correct Answer)
C. Contaminated
D. Dirty

Explanation: **Explanation:** The classification of surgical wounds is based on the degree of microbial contamination at the time of surgery. **Why "Clean-Contaminated" is correct:** A **Clean-Contaminated (Class II)** wound is defined as a procedure where a hollow viscus (respiratory, alimentary, genital, or urinary tract) is entered under controlled conditions without unusual contamination. * In an **Interval Cholecystectomy**, the gallbladder is removed after an episode of acute cholecystitis has subsided (usually 6–8 weeks later). * Since the biliary tract (part of the alimentary system) is entered, but the surgery is elective, controlled, and lacks active infection or gross spillage, it fits the Class II criteria. **Analysis of Incorrect Options:** * **Clean (Class I):** These are uninfected operative wounds where no inflammation is encountered and the respiratory, alimentary, or urinary tracts are **not** entered (e.g., Hernioplasty, Thyroidectomy). * **Contaminated (Class III):** These involve open, fresh, accidental wounds or operations with major breaks in sterile technique or gross spillage from the GI tract. An *acute* cholecystitis with bile spillage would fall here. * **Dirty (Class IV):** These involve old traumatic wounds with retained devitalized tissue or existing clinical infection/perforation (e.g., perforated diverticulitis or a gallbladder abscess). **High-Yield Clinical Pearls for NEET-PG:** * **Elective Cholecystectomy:** Always Clean-Contaminated. * **Infection Rates:** Clean (<2%), Clean-Contaminated (<10%), Contaminated (15-20%), Dirty (up to 40%). * **Prophylactic Antibiotics:** Indicated for Clean-Contaminated wounds; usually not required for Clean wounds unless a prosthetic implant is used.

Question 96: What is the term for acute pseudo-obstruction of the colon?

A. Sjögren's syndrome
B. Gardner's syndrome
C. Ogilvie's syndrome (Correct Answer)
D. Peutz-Jeghers syndrome

Explanation: **Explanation:** **Correct Answer: C. Ogilvie's syndrome** Ogilvie’s syndrome, or **Acute Colonic Pseudo-obstruction (ACPO)**, is characterized by massive dilatation of the colon (usually the cecum and right colon) in the absence of a mechanical cause. It is thought to result from an imbalance in the autonomic nervous system, where there is either overactivity of the sympathetic system or underactivity of the parasympathetic system (S2-S4). It is typically seen in elderly, bedridden patients with severe systemic illnesses, post-orthopedic surgery, or electrolyte imbalances. **Why other options are incorrect:** * **A. Sjögren's syndrome:** An autoimmune disorder primarily affecting the exocrine glands, leading to dry eyes (keratoconjunctivitis sicca) and dry mouth (xerostomia). * **B. Gardner's syndrome:** A variant of Familial Adenomatous Polyposis (FAP) characterized by the triad of colonic polyps, osteomas (usually of the mandible), and soft tissue tumors (e.g., desmoid tumors). * **D. Peutz-Jeghers syndrome:** An autosomal dominant condition featuring multiple hamartomatous polyps in the GI tract and mucocutaneous hyperpigmentation (melanotic spots on lips and buccal mucosa). **High-Yield Clinical Pearls for NEET-PG:** * **Diagnosis:** Abdominal X-ray shows massive colonic distension. The most common site of involvement is the **cecum**. * **Risk of Perforation:** If the cecal diameter exceeds **10–12 cm**, the risk of spontaneous perforation increases significantly. * **Management:** Initial treatment is conservative (NPO, decompression, electrolytes). If it fails, **Neostigmine** (acetylcholinesterase inhibitor) is the pharmacological drug of choice. * **Surgical Intervention:** Indicated only if there are signs of ischemia or perforation (e.g., cecostomy).

Question 97: Which of the following conditions is NOT associated with a 'jelly belly' appearance?

A. Cystadenoma of the appendix
B. Mucinous adenocarcinoma
C. Colorectal mucinous cancer
D. Intraductal papillary mucinous neoplasm of the pancreas (Correct Answer)

Explanation: **Explanation:** The term **'Jelly Belly'** refers to **Pseudomyxoma Peritonei (PMP)**, a clinical condition characterized by the accumulation of abundant mucinous (gelatinous) fluid within the peritoneal cavity. This occurs when a mucin-producing tumor ruptures or spreads to the peritoneal surface. **Why Option D is Correct:** **Intraductal Papillary Mucinous Neoplasm (IPMN)** of the pancreas is a precursor to pancreatic cancer that produces thick mucus *within* the pancreatic ducts. While it can lead to pancreatitis or invasive cancer, it typically does not cause Pseudomyxoma Peritonei unless there is a very rare, specific type of rupture associated with an associated invasive mucinous component. In standard clinical practice and for exam purposes, IPMN is localized to the pancreatic ductal system and is not a classic cause of "Jelly Belly." **Why the Other Options are Incorrect:** * **A & B (Cystadenoma and Mucinous Adenocarcinoma):** The most common cause of PMP is a primary mucinous tumor of the **appendix** (Low-grade Appendiceal Mucinous Neoplasm - LAMN). If these tumors rupture, they seed the peritoneum with mucin-secreting cells. * **C (Colorectal Mucinous Cancer):** Mucinous tumors of the colon, ovary, and urachus are recognized secondary causes of PMP. They can disseminate throughout the abdomen, leading to the characteristic gelatinous ascites. **High-Yield Clinical Pearls for NEET-PG:** * **Primary Source:** The appendix is the most common site of origin for PMP (>90% of cases). * **Redistribution Phenomenon:** Mucin and tumor cells follow the natural flow of peritoneal fluid, accumulating at sites of fluid absorption (e.g., greater omentum, undersurface of the diaphragm) while sparing the mobile small bowel. * **Treatment of Choice:** Cytoreductive Surgery (CRS) combined with **HIPEC** (Hyperthermic Intraperitoneal Chemotherapy). * **Classic Sign:** Scalloping of the liver and spleen margins on CT scan due to extrinsic pressure from mucinous deposits.

Question 98: Patients at increased risk for gastric carcinoma include all of the following EXCEPT?

A. Those who have undergone gastric resection for duodenal ulcer
B. Those with pernicious anemia
C. Those who have undergone gastric bypass for morbid obesity (Correct Answer)
D. Those with blood group A

Explanation: **Explanation:** The risk of gastric carcinoma is primarily linked to chronic mucosal inflammation, atrophy, and exposure to bile reflux. **Why Option C is correct:** Gastric bypass (Roux-en-Y) for morbid obesity involves creating a small gastric pouch and bypassing the distal stomach. Unlike procedures for peptic ulcer disease, the distal stomach remains in situ but is **defunctionalized**. Current evidence does not show an increased risk of malignancy in the bypassed stomach; in fact, the reduction in caloric intake and weight loss may have a protective effect against certain cancers. **Why the other options are incorrect:** * **Option A (Gastric Resection for DU):** Post-gastrectomy patients (especially after Billroth II reconstruction) are at high risk. The "gastric stump" is exposed to chronic **alkaline reflux** (bile and pancreatic secretions), leading to mucosal atrophy and intestinal metaplasia. This risk typically manifests 15–20 years post-surgery. * **Option B (Pernicious Anemia):** This is an autoimmune condition causing destruction of parietal cells, leading to **Achlorhydria**. The resulting hypergastrinemia and chronic atrophic gastritis significantly increase the risk of gastric adenocarcinoma and carcinoid tumors. * **Option D (Blood Group A):** There is a well-documented genetic association between Blood Group A and the **diffuse type** of gastric carcinoma (Lauren classification). **NEET-PG High-Yield Pearls:** * **Most common site** for gastric cancer: Antrum (though proximal/cardia cancers are rising). * **Dietary factors:** Nitrosamines, smoked foods, and high salt intake increase risk; Vitamin C and E are protective. * **H. pylori:** The most common precursor for the **intestinal type** of gastric cancer and MALToma. * **Sister Mary Joseph Nodule:** Umbilical metastasis, usually from gastric adenocarcinoma.

Question 99: What is the treatment for a bleeding benign gastric ulcer?

A. Antrectomy
B. Debridement of ulcer
C. Ulcer excision (Correct Answer)
D. High selective vagotomy

Explanation: **Explanation:** The primary goal in managing a bleeding benign gastric ulcer (Type I, II, or III) is to achieve hemostasis and rule out malignancy. **Why Ulcer Excision is Correct:** Unlike duodenal ulcers, gastric ulcers carry a significant risk of harboring an underlying **adenocarcinoma** (approximately 5-10%). Therefore, the standard surgical approach for a bleeding gastric ulcer involves **wedge excision** of the ulcer. This procedure serves two purposes: it definitively controls the bleeding by removing the eroded vessel and provides a full-thickness specimen for histopathological examination to exclude malignancy. **Analysis of Incorrect Options:** * **Antrectomy (A):** While definitive, it is a more morbid procedure. It is usually reserved for refractory cases or specific ulcer locations (Type I) but is not the immediate first-line surgical step for simple bleeding control compared to excision. * **Debridement of ulcer (B):** Debridement is insufficient for a bleeding ulcer as it does not reliably secure the bleeding vessel (usually the left gastric artery branches) nor does it provide an adequate biopsy sample. * **High selective vagotomy (D):** This is used to reduce acid secretion in duodenal ulcers. It has no role in the acute management of a bleeding gastric ulcer and does not address the risk of malignancy. **NEET-PG High-Yield Pearls:** * **Modified Johnson Classification:** * Type I: Lesser notch (Most common). * Type II: Gastric + Duodenal ulcer. * Type III: Prepyloric. * Type IV: Near GE junction. * **Surgical Mantra:** "Biopsy every gastric ulcer, but never a duodenal ulcer" (as duodenal ulcers are almost never malignant). * **First-line treatment:** Endoscopic therapy (clips, thermal, or epinephrine injection) is the initial treatment of choice; surgery is indicated only if endoscopic management fails.

Question 100: A 70-year-old patient presents with symptoms of achalasia for 3 months. Radiologic features and manometric studies show the typical features of achalasia. What is the next step in management?

A. CT scan (Correct Answer)
B. Heller's myotomy
C. Nissen's fundoplication
D. 24-hour pH monitoring

Explanation: **Explanation:** The clinical scenario describes a 70-year-old patient with a short duration of symptoms (3 months) and features of achalasia. In an elderly patient with a rapid onset of symptoms and significant weight loss, the primary concern is **Pseudoachalasia** (Secondary Achalasia). **1. Why CT Scan is the correct answer:** Pseudoachalasia is most commonly caused by a malignancy at the gastroesophageal junction (e.g., gastric adenocarcinoma) that mimics the manometric and radiologic findings of primary achalasia. In patients over 60 years old with a short symptom duration (<6 months), the next mandatory step is to rule out malignancy. A **CT scan** (or Endoscopic Ultrasound) is essential to look for mural thickening or an extrinsic mass before proceeding to definitive motility treatments. **2. Why other options are incorrect:** * **Heller’s Myotomy:** This is the surgical treatment of choice for *primary* achalasia. Performing this without ruling out malignancy in an elderly patient is a clinical error, as it will not treat the underlying cancer. * **Nissen’s Fundoplication:** This is used to treat GERD or added to a Heller’s myotomy to prevent reflux; it is not a primary diagnostic or therapeutic step for achalasia. * **24-hour pH monitoring:** This is the gold standard for diagnosing GERD, not achalasia or pseudoachalasia. **Clinical Pearls for NEET-PG:** * **Primary Achalasia:** Degeneration of Auerbach’s plexus; classic "Bird’s beak" on barium swallow. * **Pseudoachalasia Red Flags:** Age >60, rapid weight loss, and symptom duration <6 months. * **Gold Standard Diagnosis:** Manometry (shows incomplete LES relaxation and aperistalsis). * **Treatment of Choice:** Laparoscopic Heller’s Myotomy with partial fundoplication (Dor or Toupet).

Practice by Chapter

Esophageal Disorders

Practice Questions

Gastric Disorders

Practice Questions

Small Intestine Pathology

Practice Questions

Appendicitis

Practice Questions

Inflammatory Bowel Disease

Practice Questions

Intestinal Obstruction

Practice Questions

Gastrointestinal Bleeding

Practice Questions

Diverticular Disease

Practice Questions

Anorectal Disorders

Practice Questions

Colorectal Neoplasms

Practice Questions

Gastrointestinal Stomas

Practice Questions

Bariatric Surgery Principles

Practice Questions

Want unlimited practice?

Get full access to all questions, explanations, and performance tracking.

Start For Free