Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery Indian Medical PG Practice Questions and MCQs

Question 681: A 16-year-old female presents with a movable, painless abdominal lump. Exploratory laparotomy reveals a cystic lump arising from the mesentery. What is the most likely diagnosis?

A. Enterocele
B. Mesenteric cyst (Correct Answer)
C. Choledochal cyst
D. Pancreatic pseudocyst

Explanation: **Explanation:** The clinical presentation of a **painless, movable abdominal lump** in a young patient, confirmed intraoperatively as arising from the mesentery, is classic for a **Mesenteric Cyst**. **Why Mesenteric Cyst is correct:** Mesenteric cysts are rare intra-abdominal tumors, most commonly found in the ileal mesentery. A hallmark clinical sign is **Tillaux’s Sign**: the lump is mobile in a plane perpendicular to the axis of the mesentery (typically horizontal/transverse mobility) but restricted in the longitudinal plane. They are often asymptomatic until they reach a size large enough to be palpable or cause compressive symptoms. **Why other options are incorrect:** * **Enterocele:** This refers to a herniation of the small bowel into the vaginal vault or pelvic floor; it does not present as a mesenteric lump. * **Choledochal Cyst:** These are congenital dilations of the biliary tree. They typically present with the triad of jaundice, pain, and a right upper quadrant mass, rather than a generalized movable mesenteric mass. * **Pancreatic Pseudocyst:** These usually follow an episode of acute or chronic pancreatitis. They are typically fixed in the lesser sac (retroperitoneal) and are not mobile. **High-Yield Facts for NEET-PG:** * **Most common site:** Mesentery of the ileum. * **Tillaux’s Sign:** Pathognomonic clinical finding (mobility perpendicular to the mesenteric attachment). * **Pathology:** Most are benign (chylous or serous cysts). * **Treatment of choice:** Complete surgical excision (enucleation). If the blood supply to the adjacent bowel is compromised, bowel resection with anastomosis is required.

Question 682: Maximum dilatation of the esophagus occurs in which condition?

A. Carcinoma at the gastroesophageal junction
B. Achalasia cardia (Correct Answer)
C. Stricture at the lower end
D. CREST syndrome

Explanation: **Explanation:** The maximum dilatation of the esophagus, often referred to as **"Sigmoid Esophagus,"** is a classic hallmark of long-standing **Achalasia Cardia**. **1. Why Achalasia Cardia is correct:** In Achalasia, there is a failure of the Lower Esophageal Sphincter (LES) to relax due to the degeneration of the myenteric (Auerbach’s) plexus, combined with aperistalsis of the esophageal body. Because this is a chronic, slowly progressive functional obstruction, the proximal esophagus has years to gradually dilate and hypertrophy to accommodate retained food and liquid. In advanced stages, the esophagus becomes massive and tortuous (mega-esophagus), resembling a sigmoid colon. **2. Why other options are incorrect:** * **Carcinoma (GE Junction):** Malignant obstructions are rapidly progressive. The patient typically presents with dysphagia within months, meaning there is insufficient time for the esophagus to undergo massive compensatory dilatation before the patient seeks medical attention or succumbs to the disease. * **Stricture (Lower End):** While benign strictures (e.g., peptic strictures) cause proximal dilatation, they rarely reach the extreme proportions seen in Achalasia because the obstruction is often incomplete or treated earlier. * **CREST Syndrome:** In Scleroderma (part of CREST), the esophagus becomes atrophic and fibrotic. The LES is typically incompetent (low pressure) rather than hypertensive, leading to reflux rather than massive obstructive dilatation. **High-Yield Clinical Pearls for NEET-PG:** * **Barium Swallow:** Shows a characteristic **"Bird’s Beak"** or "Rat-tail" appearance. * **Gold Standard Investigation:** Esophageal **Manometry** (shows incomplete LES relaxation and aperistalsis). * **Heller’s Myotomy:** The surgical treatment of choice, usually combined with a partial fundoplication (Dor or Toupet) to prevent reflux. * **Sigmoid Esophagus:** Defined when the esophageal diameter exceeds **10 cm**.

Question 683: A segment of adjacent intestine will be removed in which of the following conditions?

A. Enterogenous cyst (Correct Answer)
B. Chylolymphatic cyst
C. Dermoid cyst
D. Mesothelial cyst

Explanation: **Explanation:** The correct answer is **Enterogenous cyst**. This is a type of mesenteric cyst that arises from the sequestration of the primitive gut during embryonic development. **1. Why Enterogenous Cyst is correct:** Enterogenous cysts are lined by intestinal epithelium (often containing mucous glands or even gastric mucosa). Their defining surgical characteristic is that they **share a common blood supply and a common muscular wall** with the adjacent segment of the normal intestine. Because the blood vessels supplying the cyst also supply the bowel, it is impossible to excise the cyst alone without compromising the viability of the intestine. Therefore, **resection of the involved segment of the intestine** along with the cyst is mandatory. **2. Why the other options are incorrect:** * **Chylolymphatic cyst (Option B):** These are the most common mesenteric cysts. They have an independent blood supply and are thin-walled. They can be easily **enucleated** from the leaves of the mesentery without requiring bowel resection. * **Dermoid cyst (Option C):** These are mature cystic teratomas. Like most benign mesenteric tumors of this type, they do not share a common wall or blood supply with the bowel and can usually be excised independently. * **Mesothelial cyst (Option D):** These arise from the sequestration of mesothelial lining. They are typically unilocular, thin-walled, and can be removed via simple excision or enucleation. **Clinical Pearls for NEET-PG:** * **Most common mesenteric cyst:** Chylolymphatic cyst. * **Tillaux’s Sign:** A classic physical finding where a mesenteric cyst is mobile in a direction perpendicular to the root of the mesentery (right to left) but fixed in the longitudinal direction. * **Management Rule:** Enucleation is the treatment of choice for most mesenteric cysts *except* enterogenous cysts, where bowel resection is required.

Question 684: A 52-year-old man presented with dysphagia and was diagnosed with adenocarcinoma of the esophagus. Where is this type of cancer most commonly seen?

A. Middle esophagus
B. Upper esophagus
C. Barrett's esophagus (Correct Answer)
D. None of the above

Explanation: **Explanation:** The correct answer is **Barrett's esophagus**. Adenocarcinoma of the esophagus is strongly associated with chronic gastroesophageal reflux disease (GERD). Persistent acid reflux leads to **intestinal metaplasia**, where the normal stratified squamous epithelium of the lower esophagus is replaced by columnar epithelium (Barrett’s esophagus). This metaplastic tissue is the precursor lesion for nearly all cases of esophageal adenocarcinoma. Consequently, this cancer is most commonly found in the **distal (lower) third** of the esophagus. **Analysis of Incorrect Options:** * **Middle and Upper Esophagus (Options A & B):** These regions are the most common sites for **Squamous Cell Carcinoma (SCC)**. SCC is traditionally associated with smoking, alcohol consumption, and caustic injuries. While SCC was historically the most common esophageal cancer worldwide, Adenocarcinoma has now surpassed it in Western countries and is rising in incidence among urban Indian populations due to obesity and GERD. **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Adenocarcinoma = Lower 1/3rd; Squamous Cell Carcinoma = Middle 1/3rd (most common site for SCC). * **Risk Factors:** Adenocarcinoma is linked to GERD, Obesity, and Barrett’s. SCC is linked to Smoking, Alcohol, Achalasia cardia, and Tylosis. * **Protective Factor:** Interestingly, *H. pylori* infection is associated with a *decreased* risk of esophageal adenocarcinoma. * **Staging:** Endoscopic Ultrasound (EUS) is the most accurate tool for 'T' (depth) and 'N' (nodal) staging.

Question 685: Which of the following is NOT a premalignant condition of the stomach?

A. Gastric ulcer
B. Pernicious anemia and achlorhydria
C. Hiatus hernia (Correct Answer)
D. Atrophic gastritis

Explanation: **Explanation:** The development of gastric adenocarcinoma often follows a predictable sequence of mucosal changes (the Correa pathway). A **premalignant condition** is a clinical state associated with a significantly increased risk of cancer, whereas a **premalignant lesion** is a histopathological change that directly predisposes to malignancy. **Why Hiatus Hernia is the Correct Answer:** A **Hiatus Hernia (Option C)** is a structural anatomical defect where part of the stomach protrudes through the diaphragmatic hiatus into the mediastinum. While it is a major risk factor for Gastroesophageal Reflux Disease (GERD) and subsequently Barrett’s Esophagus (a precursor to esophageal adenocarcinoma), it has **no direct association** with the development of gastric cancer. **Analysis of Incorrect Options:** * **Gastric Ulcer (Option A):** Chronic gastric ulcers (especially those located on the lesser curvature) carry a small but significant risk of harboring malignancy (approx. 3-5%). In contrast, duodenal ulcers are never premalignant. * **Pernicious Anemia and Achlorhydria (Option B):** Pernicious anemia leads to autoimmune destruction of parietal cells. The resulting achlorhydria causes compensatory hypergastrinemia, which can lead to gastric carcinoids and a 2-3 fold increased risk of gastric adenocarcinoma. * **Atrophic Gastritis (Option D):** This is the most common precursor. Chronic inflammation (often due to *H. pylori*) leads to the loss of glandular epithelium, which then progresses to intestinal metaplasia and dysplasia. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site for Gastric Cancer:** Historically the antrum, but the incidence of proximal/cardia cancers is rising. * **Intestinal Metaplasia:** The presence of goblet cells in the gastric mucosa is a hallmark premalignant histological change. * **Adenomatous Polyps:** Gastric polyps >2cm have a high malignant potential (up to 40%) and must be excised. * **Post-Gastrectomy Remnant:** A stomach remnant 15–20 years after a Billroth II reconstruction is considered a premalignant state due to chronic bile reflux.

Question 686: All of the following are true about carcinoid tumors except?

A. Ileum is the commonest site in the gastrointestinal tract.
B. The commonest site for malignant carcinoid is the distal ileum.
C. Elevated urinary 5-hydroxyindoleacetic acid (5-HIAA) is diagnostic of carcinoid syndrome.
D. The commonest valvular disease in carcinoid syndrome is tricuspid regurgitation. (Correct Answer)

Explanation: **Explanation:** Carcinoid tumors are neuroendocrine tumors arising from enterochromaffin (Kulchitsky) cells. This question tests the distinction between the most common sites of occurrence and the specific cardiac manifestations of carcinoid syndrome. **1. Why Option D is the correct answer (The False Statement):** While the heart is frequently involved in carcinoid syndrome (Carcinoid Heart Disease), the most common valvular lesion is **Tricuspid Stenosis** and **Pulmonary Stenosis**, often occurring together. However, if a single most common lesion is cited, it is typically **Tricuspid Regurgitation (TR)** accompanied by stenosis due to plaque-like endocardial thickening. The "Except" logic here often hinges on the fact that **Tricuspid Stenosis** is the classic pathognomonic finding, though modern literature notes TR is frequently present. *Note: In many standard surgical textbooks (like Bailey & Love), the focus is on the right-sided fibrous deposits leading to both TR and PS.* **2. Analysis of Incorrect Options (True Statements):** * **Option A:** The **Ileum** is indeed the most common site for carcinoids within the GI tract (followed by the appendix and rectum). * **Option B:** While the appendix is a common site for *benign* carcinoids, the **distal ileum** is the most common site for **malignant** carcinoids and those that metastasize to the liver. * **Option C:** **24-hour urinary 5-HIAA** is the gold-standard diagnostic biochemical marker for carcinoid syndrome (sensitivity ~70%, specificity ~90%). **High-Yield Clinical Pearls for NEET-PG:** * **Rule of 1/3s:** 1/3 are multiple, 1/3 are in the distal ileum, 1/3 have a second malignancy, and 1/3 metastasize. * **Carcinoid Syndrome:** Occurs only when hepatic metastases are present (bypassing first-pass metabolism) or with extra-portal tumors (e.g., bronchial carcinoid). * **Clinical Triad:** Flushing, Diarrhea, and Right-sided heart failure. * **Treatment of Choice:** Surgical resection; **Octreotide** (Somatostatin analogue) is used for symptomatic relief and to prevent "carcinoid crisis" during induction of anesthesia.

Question 687: What is a giant hiatal hernia?

A. Bochdalek hernia
B. Sliding hernia
C. Paraesophageal hernia (Correct Answer)
D. Sliding hernia

Explanation: ### Explanation **Concept Overview:** A **Giant Hiatal Hernia** is clinically defined as a large Type II, III, or IV paraesophageal hernia where more than **30% to 50% of the stomach** (or other intra-abdominal organs) has displaced into the thoracic cavity. While sliding hernias are more common, the term "giant" is specifically reserved for advanced **Paraesophageal Hernias (PEH)** due to their potential for life-threatening complications like gastric volvulus. **Why the Correct Answer is Right:** * **Paraesophageal Hernia (Option C):** In this type, the gastroesophageal junction (GEJ) may remain in its normal position (Type II) or migrate upward (Type III), but the gastric fundus herniates alongside the esophagus. As the defect in the diaphragm enlarges, the entire stomach can rotate and enter the chest, fulfilling the criteria for a "giant" hernia. **Why Other Options are Wrong:** * **Sliding Hernia (Options B & D):** This is the most common type (Type I), where the GEJ slides into the posterior mediastinum. While common, they rarely reach the massive proportions or carry the high risk of strangulation associated with "giant" paraesophageal hernias. * **Bochdalek Hernia (Option A):** This is a type of **congenital** diaphragmatic hernia occurring through a posterolateral defect (usually on the left). It is not classified under the spectrum of adult hiatal hernias. **NEET-PG High-Yield Pearls:** * **Classification:** Type I (Sliding), Type II (Rolling/Pure PEH), Type III (Mixed), Type IV (Giant PEH with other organs like colon/spleen). * **Clinical Sign:** **Cameron ulcers** (linear gastric erosions) are often found in giant hernias due to mechanical trauma at the diaphragmatic hiatus, leading to chronic iron deficiency anemia. * **Surgical Emergency:** The **Borchardt’s Triad** (epigastric pain, inability to vomit, and inability to pass a nasogastric tube) indicates acute gastric volvulus, a surgical emergency associated with giant hernias.

Question 688: What is the incidence of stump carcinoma?

A. 6%
B. 10%
C. 16%
D. None of the above (Correct Answer)

Explanation: ### Explanation **1. Understanding the Concept** Stump carcinoma (or gastric stump cancer) refers to a primary adenocarcinoma arising in the gastric remnant at least **5 to 15 years** after a partial gastrectomy performed for **benign disease** (usually peptic ulcer disease). The correct answer is **None of the above** because the incidence of stump carcinoma is significantly lower than the figures provided in options A, B, and C. In clinical literature and standard surgical textbooks (like Bailey & Love), the reported incidence of gastric stump carcinoma is approximately **1% to 3%**. The pathogenesis is linked to chronic **duodenogastric reflux** (bile reflux), which leads to chronic atrophic gastritis, intestinal metaplasia, and eventually dysplasia in the gastric remnant. This risk is notably higher after a **Billroth II** reconstruction compared to a Billroth I due to the increased exposure to alkaline biliary secretions. **2. Analysis of Incorrect Options** * **Options A (6%), B (10%), and C (16%):** These values significantly overestimate the risk. While the *relative risk* of developing cancer in a gastric stump is 2–4 times higher than in the general population after 15–20 years, the *absolute incidence* remains low (1–3%). **3. Clinical Pearls for NEET-PG** * **Time Interval:** The "lag period" is crucial; a malignancy occurring within 5 years of the original surgery is usually considered a missed primary or a recurrence, not a true stump carcinoma. * **Most Common Site:** The cancer typically arises at the **anastomotic site** (stoma). * **Reconstruction Risk:** Billroth II > Billroth I. * **Screening:** Endoscopic surveillance is generally recommended starting 15–20 years post-surgery. * **Prognosis:** Often poor because it is frequently diagnosed at an advanced stage.

Question 689: What is true about duodenal adenocarcinoma?

A. It is the commonest small intestinal tumor.
B. It arises from the periampullary region.
C. Jaundice and anemia are found.
D. The 5-year survival is 5%. (Correct Answer)

Explanation: **Explanation:** **Duodenal Adenocarcinoma** is a rare but aggressive malignancy. Understanding its clinical presentation and prognosis is crucial for NEET-PG. **1. Why Option D is Correct:** Duodenal adenocarcinoma carries a dismal prognosis. Because the duodenum is retroperitoneal and has a rich lymphatic drainage, the disease is often advanced at the time of diagnosis. Even with radical resection (Whipple’s procedure), the overall **5-year survival rate remains very low, approximately 5-10%**. **2. Why Other Options are Incorrect:** * **Option A:** Adenocarcinoma is **not** the most common small intestinal tumor overall; **Neuroendocrine tumors (Carcinoids)** have now surpassed adenocarcinoma in frequency in the small bowel. However, adenocarcinoma is the most common primary malignancy specifically in the *duodenum*. * **Option B:** While it can occur anywhere, the most common site for duodenal adenocarcinoma is the **second part (D2)**, but it is distinct from "periampullary" tumors (which include tumors of the ampulla, distal bile duct, and pancreatic head). * **Option C:** While jaundice can occur if the tumor obstructs the Ampulla of Vater, the **most common presenting symptoms** are non-specific, such as epigastric pain, gastric outlet obstruction, and weight loss. Anemia is common due to chronic occult blood loss, but the combination of jaundice and anemia is more classic for ampullary carcinoma rather than general duodenal adenocarcinoma. **Clinical Pearls for NEET-PG:** * **Risk Factors:** Familial Adenomatous Polyposis (FAP), Lynch syndrome, and Celiac disease. * **Most Common Site:** Second part of the duodenum (D2). * **Treatment of Choice:** Pancreaticoduodenectomy (Whipple’s procedure) for tumors in D1/D2; segmental resection for D3/D4. * **High-Yield Fact:** Small bowel tumors are rare (only 2% of GI tract malignancies) despite the small intestine representing 90% of the GI surface area.

Question 690: What is the primary use of a Sengstaken-Blakemore tube?

A. To arrest bleeding in Mallory-Weiss tears
B. To arrest bleeding in esophageal varices (Correct Answer)
C. To arrest bleeding in Dieulafoy's lesions
D. To stop bleeding from aortoenteric fistulas

Explanation: **Explanation:** The **Sengstaken-Blakemore (SB) tube** is a specialized triple-lumen orogastric tube designed for the emergency management of life-threatening hemorrhage from **esophageal varices**. **1. Why the Correct Answer is Right:** The SB tube works on the principle of **balloon tamponade**. It features two balloons: a gastric balloon (to anchor the tube and compress the gastroesophageal junction) and an esophageal balloon (to provide direct pressure against bleeding esophageal varices). It is used as a temporary "bridge" to definitive therapy (like endoscopic band ligation or TIPS) when pharmacological and endoscopic treatments fail. **2. Analysis of Incorrect Options:** * **A. Mallory-Weiss tears:** These are longitudinal mucosal lacerations at the GE junction. Bleeding usually stops spontaneously or is managed endoscopically; balloon tamponade is not indicated and could worsen the tear. * **C. Dieulafoy's lesions:** These are large submucosal arterioles that bleed through a small mucosal defect, typically in the stomach. They require endoscopic clipping or thermal cautery. * **D. Aortoenteric fistulas:** This is a surgical emergency involving a communication between the aorta and the bowel. Balloon tamponade cannot address an arterial-pressure bleed of this magnitude. **3. NEET-PG High-Yield Pearls:** * **Structure:** 3 lumens (Gastric aspiration, Gastric balloon, Esophageal balloon). The **Minnesota tube** is a 4-lumen variant (adds esophageal aspiration). * **Pressure:** The esophageal balloon is typically inflated to **25–45 mmHg**. * **Complications:** The most feared complication is **esophageal rupture** or airway obstruction if the tube migrates upward. * **Safety Tip:** Always keep a pair of scissors at the bedside to cut the tube and deflate balloons immediately if respiratory distress occurs.

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