Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery Indian Medical PG Practice Questions and MCQs

Question 231: What is the treatment of choice for small intestine carcinoma?

A. Radiotherapy
B. Chemotherapy
C. Surgery (Correct Answer)
D. None of the above

Explanation: **Explanation:** The treatment of choice for small intestine carcinoma is **surgical resection**. This is because primary small bowel malignancies (most commonly adenocarcinoma, followed by carcinoid tumors) are relatively resistant to non-surgical modalities, and achieving a wide negative margin (R0 resection) is the only definitive way to provide a chance for a cure. * **Why Surgery is Correct:** For adenocarcinomas, the standard procedure involves wide local excision of the affected segment along with a formal lymphadenectomy of the draining mesenteric lymph nodes. If the tumor is in the duodenum, a pancreaticoduodenectomy (Whipple procedure) may be required. * **Why Radiotherapy is Incorrect:** The small intestine is highly sensitive to radiation, and the doses required to kill adenocarcinoma cells would cause severe radiation enteritis, perforation, or strictures in the surrounding healthy bowel loops. * **Why Chemotherapy is Incorrect:** While chemotherapy (e.g., 5-FU based regimens) may be used as adjuvant therapy in node-positive cases or for palliative care in metastatic disease, it is not the primary curative modality. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** Adenocarcinoma most commonly occurs in the **duodenum** (specifically the periampullary region), whereas Carcinoid tumors are most common in the **ileum**. * **Risk Factors:** Crohn’s disease (increases risk of ileal adenocarcinoma), Celiac disease, and Familial Adenomatous Polyposis (FAP). * **Presentation:** Often presents late with vague symptoms; "partial small bowel obstruction" in an elderly patient without a history of previous surgery should raise suspicion of malignancy. * **Tumor Marker:** CEA may be elevated in adenocarcinomas, while 5-HIAA is used for Carcinoid syndrome.

Question 232: Which one of the following is not a treatment for gastroesophageal variceal hemorrhage?

A. Sclerotherapy
B. Sengstaken tube
C. Trans-jugular intrahepatic portacaval shunt
D. Gastric freezing (Correct Answer)

Explanation: **Explanation:** The management of acute gastroesophageal variceal hemorrhage focuses on hemodynamic stabilization, pharmacological therapy (Octreotide/Terlipressin), and definitive mechanical or surgical intervention to stop the bleeding. **Why Gastric Freezing is the Correct Answer:** **Gastric freezing** is an obsolete technique introduced in the 1960s primarily for the treatment of **duodenal ulcers**. It involved circulating a coolant through a balloon to reduce acid secretion. It has **no role** in the management of portal hypertension or variceal bleeding. Furthermore, it was abandoned due to lack of efficacy and severe complications like gastric mucosal necrosis. **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 gold standard, EST remains a valid treatment 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. * **Trans-jugular Intrahepatic Portosystemic Shunt (TIPS):** This is a radiologic procedure that creates a low-resistance channel between the hepatic vein and the portal vein. It is indicated for refractory variceal bleeding that does not respond to endoscopic or medical management. **Clinical Pearls for NEET-PG:** * **Drug of choice (Initial):** Terlipressin (reduces portal pressure). * **Procedure of choice (Prophylaxis & Acute):** Endoscopic Variceal Ligation (EVL). * **Prophylactic Antibiotics:** Ceftriaxone is mandatory in cirrhotic patients with GI bleed to prevent SBP and re-bleeding. * **TIPS Contraindication:** Severe congestive heart failure and polycystic liver disease.

Question 233: A 60-year-old patient presents with a 6-week history of dysphagia, initially with solid foods, and now can only swallow liquids. What investigations should be performed to diagnose this condition?

A. Chest X-ray (CXR)
B. Barium Swallow
C. Endoscopy
D. All of the above (Correct Answer)

Explanation: **Explanation:** The clinical presentation of progressive dysphagia (solids followed by liquids) in a 60-year-old patient is highly suspicious for **Esophageal Carcinoma** until proven otherwise. A multi-modal diagnostic approach is required to confirm the diagnosis and assess the extent of the disease. * **Endoscopy (Option C):** This is the **investigation of choice**. It allows for direct visualization of the lesion and, most importantly, obtaining a **biopsy** for histopathological confirmation. * **Barium Swallow (Option B):** Often the initial screening test, it helps identify the location, length, and nature of the stricture. Classic findings like the **"Rat-tail appearance"** or "Bird-beak appearance" (in achalasia) provide crucial diagnostic clues. * **Chest X-ray (Option A):** While not diagnostic for the primary tumor, it is essential for identifying complications or associated findings such as mediastinal widening, lung metastases, or aspiration pneumonia. **Why "All of the above" is correct:** In clinical practice and for exam purposes, diagnosing a suspected malignancy involves a sequence of imaging and tissue sampling. While endoscopy provides the definitive tissue diagnosis, Barium swallow and CXR provide anatomical and staging context necessary for management. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard for Diagnosis:** Endoscopy + Biopsy. * **Best Initial Investigation:** Barium Swallow (though Endoscopy is often preferred if available). * **Most Common Site (Global):** Lower third (Adenocarcinoma); **Most Common Site (India):** Middle third (Squamous Cell Carcinoma). * **Staging Investigation of Choice:** Contrast-Enhanced CT (CECT) of the chest and abdomen; **Endoscopic Ultrasound (EUS)** is the most accurate for 'T' and 'N' staging.

Question 234: What is the commonest site for esophageal carcinoma?

A. Upper 2/3
B. Middle 1/3 (Correct Answer)
C. Lower 1/3
D. Crico-esophageal junction

Explanation: **Explanation:** The esophagus is anatomically divided into three segments: upper, middle, and lower thirds. Globally and historically, **Squamous Cell Carcinoma (SCC)** has been the most prevalent histological type of esophageal cancer, and its most frequent location is the **middle third (mid-esophagus)**. **1. Why Middle 1/3 is Correct:** Approximately 50% of all esophageal carcinomas (specifically Squamous Cell Carcinoma) occur in the middle third. This area is highly susceptible due to prolonged exposure to carcinogens (like tobacco and alcohol) and the presence of physiological constrictions where bolus transit is slightly slower. **2. Analysis of Incorrect Options:** * **Upper 1/3 (Option A):** While SCC can occur here, it accounts for only about 15–20% of cases. * **Lower 1/3 (Option C):** This is the most common site for **Adenocarcinoma**, which arises from Barrett’s esophagus (metaplasia due to GERD). While Adenocarcinoma is rising rapidly in Western countries, globally and for the purpose of standard surgical teaching, the middle third remains the most common site for overall esophageal cancer. * **Crico-esophageal junction (Option D):** This is the site for Plummer-Vinson syndrome-related cancers and post-cricoid carcinomas, but it is a rare primary site compared to the mid-esophagus. **High-Yield Clinical Pearls for NEET-PG:** * **Most common histology (Worldwide/India):** Squamous Cell Carcinoma. * **Most common histology (Western world):** Adenocarcinoma (Lower 1/3). * **Most common symptom:** Progressive dysphagia (first for solids, then liquids). * **Investigation of choice:** Upper GI Endoscopy with biopsy. * **Staging investigation of choice:** Contrast-Enhanced CT (CECT) and Endoscopic Ultrasound (EUS).

Question 235: In clinical practice, to label remission in the case of ulcerative colitis, all the following features are needed, EXCEPT:

A. Stool frequency <3 per day
B. No bleeding
C. No urgency
D. Normal looking mucosa on endoscopy (Correct Answer)

Explanation: In clinical practice, the definition of **remission** in Ulcerative Colitis (UC) is primarily based on **clinical symptomatic relief** rather than complete endoscopic normalization. ### Why Option D is the Correct Answer While "Mucosal Healing" (normal-looking mucosa on endoscopy) is a major therapeutic goal and a predictor of long-term prognosis, it is **not required** to label a patient as being in clinical remission. Many patients achieve complete resolution of symptoms (clinical remission) while still showing mild inflammatory changes (like erythema or loss of vascular pattern) on endoscopy. Therefore, endoscopic normalization is a deeper level of healing beyond standard clinical remission. ### Explanation of Incorrect Options The standard criteria for clinical remission (often based on the **Partial Mayo Score**) include: * **Option A (Stool frequency <3/day):** A return to normal bowel habits (usually defined as ≤3 stools per day) is a hallmark of remission. * **Option B (No bleeding):** The absence of visible rectal bleeding is a mandatory requirement for remission. * **Option C (No urgency):** Tenesmus and urgency are cardinal symptoms of active proctitis; their resolution is essential for clinical remission. ### NEET-PG High-Yield Pearls * **Truelove and Witts Criteria:** Used to classify the **severity** of an acute attack (Mild, Moderate, Severe). Severe UC is defined as >6 bloody stools/day + systemic toxicity (fever, tachycardia, anemia, or high ESR). * **Mucosal Healing:** Defined as a **Mayo Endoscopic Subscore of 0 or 1**. * **Best Marker for Activity:** **Fecal Calprotectin** is the most sensitive non-invasive marker to monitor disease activity and predict relapses. * **Surgery Indication:** The most common indication for emergency surgery in UC is **Toxic Megacolon** unresponsive to medical management.

Question 236: What pressure should the Sengstaken tube maintain to stop bleeding from varices?

A. 20 mm Hg
B. 25 mm Hg
C. 35 mm Hg (Correct Answer)
D. 45 mm Hg

Explanation: **Explanation:** The **Sengstaken-Blakemore (SB) tube** is a triple-lumen device used for the emergency management of life-threatening esophageal variceal hemorrhage when endoscopic therapy fails or is unavailable. **1. Why 35 mm Hg is correct:** The goal of the esophageal balloon is to provide direct mechanical compression (tamponade) against the bleeding varices. To effectively stop the bleeding, the pressure in the esophageal balloon must exceed the portal venous pressure. In patients with portal hypertension, the portal pressure is typically elevated above 10–12 mm Hg. A pressure of **35–40 mm Hg** is the standard therapeutic range; it is high enough to compress the variceal plexus but remains below the capillary perfusion pressure of the esophageal mucosa to minimize the risk of ischemic necrosis. **2. Analysis of incorrect options:** * **20 & 25 mm Hg (Options A & B):** These pressures are often insufficient to overcome the high hydrostatic pressure found in severe portal hypertension, leading to failure of the tamponade. * **45 mm Hg (Option D):** While this would stop the bleeding, pressures exceeding 40 mm Hg significantly increase the risk of esophageal mucosal ulceration, necrosis, and potential perforation. **High-Yield Clinical Pearls for NEET-PG:** * **The Three Lumens:** 1. Gastric aspiration, 2. Gastric balloon (inflated with 250–300 ml of air), 3. Esophageal balloon. * **The Minnesota Tube:** A variation that includes a fourth lumen for esophageal aspiration to prevent aspiration pneumonia. * **Safety First:** Always inflate the **gastric balloon first** and confirm its position via X-ray before inflating the esophageal balloon to prevent airway obstruction. * **Complications:** The most common serious complication is **aspiration pneumonia**; the most lethal is **esophageal rupture**. * **Duration:** It is a temporary bridge (max 24 hours) until definitive treatment like TIPS or endoscopy can be performed.

Question 237: What is true about upper gastrointestinal bleeding?

A. Malaena is the only symptom.
B. Bleeding occurs beyond the ampulla of Vater.
C. Endoscopy can best diagnose it.
D. Peptic ulcer is the most common cause. (Correct Answer)

Explanation: **Explanation:** **1. Why Option D is Correct:** Peptic ulcer disease (PUD), including both gastric and duodenal ulcers, remains the **most common cause** of upper gastrointestinal bleeding (UGIB) worldwide, accounting for approximately 40–50% of cases. In the context of NEET-PG, it is essential to remember that while variceal bleeding is common in cirrhotic patients, PUD is the leading cause in the general population. **2. Why Other Options are Incorrect:** * **Option A:** Malaena is a classic sign, but it is not the *only* symptom. Patients may also present with **haematemesis** (bright red or coffee-ground vomiting) or, in cases of massive brisk bleeding, **haematochezia** (bright red blood per rectum). * **Option B:** By definition, Upper GI bleeding occurs from a source **proximal to the Ligament of Treitz** (the suspensory muscle of the duodenum). The Ampulla of Vater is located in the second part of the duodenum, which is proximal to this ligament; however, the standard anatomical landmark for defining UGIB is the Ligament of Treitz. * **Option C:** While endoscopy is the **investigation of choice** for both diagnosis and therapeutic intervention, the question asks for what is "true" in a general clinical context. Option D is a more fundamental epidemiological fact. (Note: In some exams, if "Investigation of choice" was asked, Endoscopy would be the answer). **High-Yield Clinical Pearls for NEET-PG:** * **Rockall Score & Blatchford Score:** Used for risk stratification in UGIB. Blatchford is used at presentation (pre-endoscopy), while Rockall is used post-endoscopy. * **Dieulafoy’s Lesion:** A large submucosal artery that causes intermittent massive bleeding, typically located on the lesser curvature of the stomach. * **Forrest Classification:** Used to grade peptic ulcers based on endoscopic appearance to predict the risk of rebleeding (Forrest Ia is an active spurter). * **Management:** IV Proton Pump Inhibitors (PPIs) should be started immediately; for variceal bleed, Terlipressin or Octreotide is the drug of choice.

Question 238: In gallstone ileus, where is the obstruction most commonly seen?

A. Jejunum
B. Proximal ileum
C. Distal ileum (Correct Answer)
D. Colon

Explanation: **Explanation:** Gallstone ileus is a mechanical small bowel obstruction caused by the impaction of a large gallstone (usually >2.5 cm) that has migrated through a biliary-enteric fistula (most commonly **cholecystoduodenal**). **Why Distal Ileum is the Correct Answer:** The **distal ileum** is the narrowest part of the small intestine and has relatively weaker peristaltic activity compared to the proximal segments. As a large gallstone travels distally, it eventually reaches the **ileocecal valve**, which acts as a physiological bottleneck. Consequently, approximately **60-70%** of stones impact in the distal ileum, making it the most common site of obstruction. **Analysis of Incorrect Options:** * **Jejunum (A) & Proximal Ileum (B):** While stones can occasionally lodge here if they are exceptionally large or if there is pre-existing stricture (e.g., Crohn’s), the lumen in these segments is generally wider than the distal ileum, allowing the stone to pass further down. * **Colon (D):** Obstruction in the colon (Bouveret-like syndrome of the large bowel) is rare. It typically only occurs if there is a pre-existing colonic stricture or if the fistula is cholecystocolic. **NEET-PG High-Yield Pearls:** * **Rigler’s Triad (Pathognomonic):** 1. Pneumobilia (air in biliary tree), 2. Small bowel obstruction, 3. Ectopic radiopaque gallstone. * **Bouveret Syndrome:** A specific type of gallstone ileus where the stone impacts in the **duodenum**, causing gastric outlet obstruction. * **Treatment:** The priority is **Enterolithotomy** (proximal incision to the stone to remove it). Cholecystectomy and fistula repair are usually deferred to a later stage unless the patient is highly stable.

Question 239: All of the following are true about ischemic colitis except:

A. The inferior mesenteric artery (IMA) is commonly occluded in cases needing aortic ischemia.
B. Ischemia is more common in the small bowel as compared to the large bowel. (Correct Answer)
C. The most common site of post-ischemic stricture is the sigmoid colon.
D. Transection of the IMA does not necessitate reimplantation if aortic surgery is attempted.

Explanation: **Explanation:** **Ischemic colitis** is the most common form of intestinal ischemia. The correct answer is **Option B** because the **large bowel is more frequently affected by ischemia than the small bowel.** This is due to the colon's relatively lower collateral blood flow and its susceptibility to systemic hypotension (non-occlusive ischemia), whereas the small bowel has a robust redundant blood supply via the arcade system of the superior mesenteric artery. **Analysis of other options:** * **Option A:** During abdominal aortic aneurysm (AAA) repair, the **IMA is routinely ligated/occluded**. In most cases, collateral flow from the SMA (via the marginal artery of Drummond) prevents infarction. * **Option C:** The **sigmoid colon** is the most common site for post-ischemic strictures. This occurs because the sigmoid is a "watershed area" (Sudek’s point) where the blood supply from the IMA meets the systemic supply from the iliac arteries. * **Option D:** In aortic surgery, **reimplantation of the IMA is usually not necessary** unless there is evidence of poor collateral flow (e.g., back-pressure <40 mmHg or dusky appearance of the colon). **High-Yield Clinical Pearls for NEET-PG:** 1. **Watershed Areas:** The most vulnerable sites are **Griffith’s point** (splenic flexure - SMA/IMA junction) and **Sudek’s point** (rectosigmoid junction). 2. **Radiology:** The classic sign on a barium enema or CT is **"Thumbprinting"** (due to submucosal edema/hemorrhage). 3. **Presentation:** Typically presents as sudden onset left-sided abdominal pain followed by bloody diarrhea in an elderly patient. 4. **Management:** Most cases (80%) are transient and resolve with conservative management; surgery is reserved for gangrene or perforation.

Question 240: Jelly belly is otherwise known as:

A. Abdominal obesity in Cushing syndrome
B. Pseudomyxoma peritonei (Correct Answer)
C. Tuberculous abdomen
D. Kwashiorkor

Explanation: **Explanation:** **Pseudomyxoma Peritonei (PMP)** is a rare clinical condition characterized by the progressive accumulation of mucinous (gelatinous) ascites within the peritoneal cavity. It is colloquially termed **"Jelly Belly"** because the abdomen becomes distended with a thick, jelly-like substance secreted by mucinous tumor cells. * **Why Option B is Correct:** PMP most commonly originates from a **mucinous neoplasm of the appendix** (e.g., Low-grade Appendiceal Mucinous Neoplasm - LAMN). When the appendix ruptures, neoplastic cells seed the peritoneal surface, producing vast amounts of mucin. This leads to the characteristic "jelly-like" appearance during laparotomy. * **Why Other Options are Incorrect:** * **Option A:** Abdominal obesity in Cushing syndrome is characterized by "centripetal obesity" due to hypercortisolism, not mucinous accumulation. * **Option C:** Tuberculous abdomen typically presents with "doughy feel" abdomen (in the plastic variety) or straw-colored ascites, but not gelatinous material. * **Option D:** Kwashiorkor presents with a "potbelly" appearance due to muscle wasting, fatty liver, and edema from hypoalbuminemia. **High-Yield Clinical Pearls for NEET-PG:** 1. **Redistribution Phenomenon:** Neoplastic cells in PMP follow the flow of peritoneal fluid and settle at sites of fluid absorption (e.g., greater omentum, undersurface of the diaphragm), often sparing the mobile small bowel loops. 2. **Scalloping of the Liver:** A classic radiological sign on CT scan where the mucinous deposits indent the liver and splenic margins. 3. **Treatment of Choice:** The "Sugarbaker Procedure," which involves **Cytoreductive Surgery (CRS)** combined with **Hyperthermic Intraperitoneal Chemotherapy (HIPEC)**.

Practice by Chapter

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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