Gastrointestinal Surgery — MCQs

A 55-year-old male presents with features of obstructive jaundice and a weight loss of seven kilograms in the last two months. CT scan shows dilatation of the common bile duct (CBD) up to its lower end and dilatation of the main pancreatic duct. The pancreas appears normal. What is the most likely diagnosis?

Q428Medium

Which of the following is FALSE regarding Meckel's diverticulum?

Q429Medium

Which of the following statements regarding stress ulcers is true?

Q430Easy

What is the most common site of an intra-peritoneal abscess?

Gastrointestinal Surgery Indian Medical PG Practice Questions and MCQs

Question 421: What is the treatment of choice in intractable ulcerative colitis?

A. Mucosal proctectomy with ileoanal pouch anastomosis (Correct Answer)
B. Proctectomy
C. Colectomy with ileostomy
D. Ileorectal anastomosis

Explanation: **Explanation:** The treatment of choice for intractable ulcerative colitis (UC) is **Restorative Proctocolectomy with Ileoanal Pouch Anastomosis (IPAA)**, often involving a mucosal proctectomy. **Why Option A is Correct:** Ulcerative colitis is a mucosal disease that involves the colon and rectum. To achieve a "surgical cure," all diseased mucosa must be removed. IPAA is the gold standard because it removes the entire target organ (colon and rectum) while preserving the anal sphincter mechanism and avoiding a permanent stoma, thereby maintaining a near-normal quality of life. **Why Other Options are Incorrect:** * **B. Proctectomy:** Removing only the rectum is insufficient as the disease involves the entire colon. * **C. Colectomy with ileostomy (Brooke’s Ileostomy):** While this removes the colon, it leaves the diseased rectum behind and requires a permanent stoma. It is usually reserved for emergency settings (e.g., toxic megacolon) or patients unfit for a pouch. * **D. Ileorectal anastomosis:** This leaves the diseased rectal mucosa in situ, posing a significant risk for ongoing inflammation and future rectal malignancy. **High-Yield Clinical Pearls for NEET-PG:** * **Surgical Cure:** UC is surgically curable (unlike Crohn’s disease). * **Most Common Pouch:** The **'J-pouch'** is the most frequently constructed configuration due to ease of creation and functional outcomes. * **Indications for Surgery:** Intractability (most common), toxic megacolon, perforation, and biopsy-proven high-grade dysplasia or carcinoma. * **Pouchitis:** The most common long-term complication of IPAA, typically treated with Metronidazole or Ciprofloxacin.

Question 422: What is the most common complication seen in hiatus hernia?

A. Volvulus
B. Esophagitis (Correct Answer)
C. Esophageal stricture
D. Aspiration pneumonitis

Explanation: **Explanation:** The most common complication of a hiatus hernia (specifically the sliding type, which accounts for >90% of cases) is **Gastroesophageal Reflux Disease (GERD)**, leading to **Esophagitis**. In a hiatus hernia, the displacement of the gastroesophageal junction into the posterior mediastinum disrupts the physiological anti-reflux barrier (the "flap-valve" mechanism and the extrinsic compression by the diaphragmatic crura). This leads to the chronic exposure of the esophageal mucosa to gastric acid, resulting in inflammation (esophagitis), which is the most frequent clinical sequela. **Analysis of Incorrect Options:** * **A. Volvulus:** This is a rare but life-threatening complication primarily associated with **Paraesophageal (Type II)** hernias, where the stomach rotates on its axis. It is not the most common complication overall. * **C. Esophageal stricture:** This is a late-stage complication of chronic, untreated esophagitis. While significant, it occurs in a smaller percentage of patients compared to simple inflammation. * **D. Aspiration pneumonitis:** This occurs due to nocturnal regurgitation of gastric contents into the lungs. While a recognized complication of severe GERD, it is less frequent than localized esophageal inflammation. **High-Yield Clinical Pearls for NEET-PG:** * **Sliding Hiatus Hernia (Type I):** Most common type; main symptom is heartburn/reflux. * **Paraesophageal Hernia (Type II):** The GE junction remains in place, but the fundus herniates. Higher risk of **strangulation and volvulus**; often requires surgical repair even if asymptomatic. * **Cameron Ulcers:** Linear gastric erosions found in the mucosal folds of a large hiatus hernia due to mechanical trauma; a known cause of iron deficiency anemia. * **Investigation of Choice:** Barium swallow is excellent for anatomy, but **Endoscopy** is preferred to assess for the complication of esophagitis.

Question 423: Least chances of complication like dumping syndrome and diarrhea are seen in which of the following surgical conditions?

A. Parietal cell vagotomy (Correct Answer)
B. Truncal vagotomy and Gastrojejunostomy
C. Antrectomy with truncal vagotomy
D. Vagotomy with pyloroplasty

Explanation: **Explanation:** The incidence of post-vagotomy complications like **dumping syndrome** and **diarrhea** is directly related to the extent of denervation and the loss of the pyloric sphincter mechanism. **1. Why Parietal Cell Vagotomy (PCV) is correct:** Parietal Cell Vagotomy (also known as Highly Selective Vagotomy) is the most anatomical approach. It denervates only the acid-secreting proximal two-thirds of the stomach while **preserving the nerve of Latarjet**, which supplies the antrum and pylorus. Because the pyloric sphincter remains intact and functional, gastric emptying of solids remains controlled, and there is no rapid bolus entry into the duodenum. Consequently, the risk of dumping syndrome and diarrhea is minimal (<1%). **2. Analysis of Incorrect Options:** * **Truncal Vagotomy (TV) with Drainage (B & D):** TV denervates the entire stomach and the hepatobiliary-celiac axis. It causes gastric stasis, necessitating a drainage procedure (Pyloroplasty or Gastrojejunostomy). These procedures destroy or bypass the pylorus, leading to rapid gastric emptying of hypertonic fluids (Dumping) and increased bile acid flow to the colon (Post-vagotomy diarrhea). * **Antrectomy with Truncal Vagotomy (C):** This procedure has the highest success rate for ulcer healing but the **highest rate of complications**. Removing the antrum and the pylorus significantly alters gastric reservoir function and emptying kinetics. **Clinical Pearls for NEET-PG:** * **Gold Standard for Duodenal Ulcer (Elective):** Parietal Cell Vagotomy (lowest morbidity, though higher recurrence rate than TV). * **Post-vagotomy Diarrhea:** Most common after Truncal Vagotomy (approx. 5-10%). * **Dumping Syndrome:** Primarily managed conservatively (high protein, low carb, small frequent meals). Octreotide is the drug of choice for refractory cases. * **Recurrence Rate:** PCV (10-15%) > TV + Pyloroplasty (5-10%) > TV + Antrectomy (1%).

Question 424: All of the following are complications of ileal resection, except:

A. Megaloblastic anemia
B. Iron deficiency anemia (Correct Answer)
C. Gastric hypersecretion
D. Malabsorption syndrome

Explanation: The terminal ileum is a specialized segment of the small intestine with specific physiological functions. Understanding its role is key to identifying the consequences of its resection. **Why Iron Deficiency Anemia is the Correct Answer:** Iron is primarily absorbed in the **duodenum and proximal jejunum**. Therefore, ileal resection does not directly interfere with iron absorption. Iron deficiency anemia is typically associated with pathologies of the upper GI tract or chronic blood loss, not ileal loss. **Explanation of Other Options:** * **Megaloblastic Anemia:** The terminal ileum is the exclusive site for the absorption of the **Vitamin B12-Intrinsic Factor complex**. Resection leads to B12 deficiency, resulting in macrocytic megaloblastic anemia. * **Gastric Hypersecretion:** Extensive small bowel resection (including the ileum) leads to a compensatory increase in gastrin levels. This causes gastric acid hypersecretion, which can exacerbate malabsorption by inactivating pancreatic enzymes. * **Malabsorption Syndrome:** The ileum is responsible for the enterohepatic circulation of **bile salts**. Resection leads to a depleted bile salt pool, resulting in fat maldigestion and steatorrhea. Additionally, the loss of the ileocecal valve reduces transit time, further contributing to malabsorption. **High-Yield Clinical Pearls for NEET-PG:** 1. **Bile Acid Diarrhea:** If <100 cm of ileum is resected, bile acids enter the colon and cause secretory diarrhea (Choleretic diarrhea). Treat with **Cholestyramine**. 2. **Steatorrhea:** If >100 cm is resected, bile salt depletion is so severe that fats are not emulsified. Treat with a **low-fat diet and MCT oil**. 3. **Hyperoxaluria:** Malabsorbed fats bind to calcium in the gut. This leaves oxalate free to be absorbed in the colon, leading to **calcium oxalate renal stones**. 4. **Gallstones:** Decreased bile salt pool increases the lithogenicity of bile, leading to cholesterol gallstones.

Question 425: Multiple liver secondaries are most common in which of the following cancers?

A. Head of pancreas
B. Stomach
C. Gall bladder (Correct Answer)
D. Periampullary

Explanation: **Explanation:** The liver is the most common site for hematogenous and direct spread of gastrointestinal malignancies. Among the options provided, **Gallbladder (GB) cancer** is the most likely to present with multiple liver secondaries. **Why Gallbladder Cancer is Correct:** The gallbladder is anatomically situated in the gallbladder fossa on the inferior surface of the liver (Segments IVb and V). Due to its thin wall and the absence of a muscularis mucosae, GB cancer easily invades the liver through two primary routes: 1. **Direct Extension:** The proximity allows for early local invasion. 2. **Venous Drainage:** The venous drainage of the gallbladder (cholecystic veins) flows directly into the portal venous system within the liver, facilitating rapid and extensive intrahepatic metastasis. By the time of diagnosis, nearly 50-75% of patients already have liver involvement. **Analysis of Incorrect Options:** * **Stomach (B):** While gastric cancer frequently metastasizes to the liver via the portal vein, it often presents with primary gastric symptoms first. Statistically, GB cancer has a higher immediate propensity for liver spread due to anatomical proximity. * **Head of Pancreas (A) & Periampullary (D):** These tumors typically present early with **obstructive jaundice** (due to CBD compression). Because they present early with jaundice, they are often diagnosed before massive, multiple liver secondaries have developed, unlike the relatively "silent" progression of GB cancer. **NEET-PG High-Yield Pearls:** * **Most common site of distant metastasis for all GI tumors:** Liver. * **Most common primary tumor causing liver secondaries (overall):** Colon cancer. * **Most common route of liver metastasis:** Portal vein. * **Characteristic finding:** "Umbilication" of liver nodules (due to central necrosis). * **Tumor Marker for GB Cancer:** CA 19-9 and CEA.

Question 426: Heller myotomy is indicated in which of the following conditions?

A. Congenital hypoplastic psoriasis (CHPS)
B. Carcinoma of the esophagus
C. Achalasia cardiae (Correct Answer)
D. Hiatal hernia

Explanation: **Explanation:** **Achalasia Cardiae (Correct Answer):** Achalasia is a primary esophageal motility disorder characterized by the failure of the Lower Esophageal Sphincter (LES) to relax and the absence of peristalsis in the distal esophagus. This is due to the degeneration of the myenteric (Auerbach’s) plexus. **Heller’s Myotomy** is the surgical treatment of choice. It involves performing a longitudinal incision through the muscular layers (circular and longitudinal) of the distal esophagus and the proximal stomach (cardia) to relieve the functional obstruction. It is now most commonly performed laparoscopically and is usually combined with an anti-reflux procedure (e.g., Dor or Toupet fundoplication) to prevent postoperative GERD. **Incorrect Options:** * **CHPS:** The surgical treatment for Congenital Hypertrophic Pyloric Stenosis is **Ramstedt’s Pyloromyotomy**, which involves splitting the hypertrophied pyloric muscle. * **Carcinoma of the Esophagus:** Treatment typically involves esophagectomy (e.g., Ivor-Lewis or McKeown procedure), radiotherapy, or chemotherapy, depending on the stage. Myotomy has no role in malignancy. * **Hiatal Hernia:** Management involves hernia sac reduction and **Cruroplasty** (repair of the diaphragmatic hiatus), often combined with a Nissen fundoplication. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Diagnosis:** Esophageal Manometry (shows "Bird’s beak" appearance on Barium swallow). * **Manometry Finding:** Incomplete LES relaxation (residual pressure >10 mmHg) and aperistalsis. * **Modified Heller’s Myotomy:** The incision extends 5 cm above the gastroesophageal junction and 2 cm below it onto the stomach. * **POEM (Per-Oral Endoscopic Myotomy):** A newer, minimally invasive endoscopic alternative to Heller’s Myotomy.

Question 427: A 55-year-old male presents with features of obstructive jaundice and a weight loss of seven kilograms in the last two months. CT scan shows dilatation of the common bile duct (CBD) up to its lower end and dilatation of the main pancreatic duct. The pancreas appears normal. What is the most likely diagnosis?

A. Choledocholithiasis
B. Carcinoma of the gallbladder
C. Hilar cholangiocarcinoma
D. Periampullary carcinoma (Correct Answer)

Explanation: ### Explanation **Correct Answer: D. Periampullary carcinoma** The clinical presentation of **obstructive jaundice** and significant **weight loss** in an elderly patient is highly suggestive of malignancy. The key diagnostic feature in this case is the **"Double Duct Sign"**—the simultaneous dilatation of both the Common Bile Duct (CBD) and the Main Pancreatic Duct (MPD). This sign indicates an obstruction located at the level of the **Ampulla of Vater** or the head of the pancreas, where both ducts converge. Since the CT scan specifies that the "pancreas appears normal," the most likely diagnosis is a **Periampullary carcinoma** (which includes tumors of the ampulla, distal CBD, or duodenal mucosa). #### Why other options are incorrect: * **A. Choledocholithiasis:** While it causes CBD dilatation and jaundice, it rarely causes significant weight loss or the "Double Duct Sign" unless a stone is impacted precisely at the Ampulla, which is less common than malignancy in this age group. * **B. Carcinoma of the gallbladder:** This typically presents with a mass in the gallbladder fossa and causes biliary obstruction at the level of the common hepatic duct (high obstruction), not the lower CBD. It does not cause pancreatic duct dilatation. * **C. Hilar cholangiocarcinoma (Klatskin tumor):** This occurs at the confluence of the right and left hepatic ducts. It results in dilated intrahepatic biliary radicals (IHBRD) but a **collapsed/normal CBD** and a normal pancreatic duct. #### NEET-PG High-Yield Pearls: * **Double Duct Sign:** Classically seen in Carcinoma Head of Pancreas and Periampullary Carcinoma. * **Courvoisier’s Law:** In a patient with obstructive jaundice, if the gallbladder is palpable, the obstruction is unlikely to be due to a stone (as stones cause a fibrotic, non-distensible GB). It points toward malignancy. * **Investigation of Choice:** **CECT** is the initial investigation for staging; **ERCP** is used for visualization and biopsy/stenting. * **Treatment:** The definitive surgical procedure for resectable periampullary tumors is **Whipple’s Pancreaticoduodenectomy**.

Question 428: Which of the following is FALSE regarding Meckel's diverticulum?

A. It is usually found on the mesenteric border of the ileum. (Correct Answer)
B. The distance from the ileo-caecal valve depends on the age of the patient.
C. It is supplied by the omphalomesenteric artery, an ileal branch of the Superior mesenteric artery.
D. The most common ectopic mucosa found is of gastric origin.

Explanation: **Explanation:** Meckel’s diverticulum is the most common congenital anomaly of the gastrointestinal tract, resulting from the incomplete obliteration of the **vitellointestinal (omphalomesenteric) duct**. **1. Why Option A is False (The Correct Answer):** Meckel’s diverticulum is a **true diverticulum** (containing all layers of the bowel wall) and is characteristically located on the **antimesenteric border** of the ileum. This is a crucial anatomical distinction from acquired diverticula, which usually occur at the mesenteric border where blood vessels enter the bowel. **2. Analysis of Other Options:** * **Option B:** The distance from the ileocecal valve follows the "Rule of 2s." In infants, it is roughly 2 feet (approx. 40–60 cm) from the valve, but this distance increases with age as the ileum grows. * **Option C:** It receives its blood supply from the **persistent vitelline (omphalomesenteric) artery**, which originates from the Superior Mesenteric Artery (SMA). This is a terminal artery, making the diverticulum prone to ischemia if twisted. * **Option D:** Ectopic tissue is found in about 50% of symptomatic cases. **Gastric mucosa** is the most common (60–80%), followed by pancreatic tissue. Gastric mucosa is responsible for acid secretion leading to peptic ulceration and painless bleeding. **High-Yield Clinical Pearls for NEET-PG:** * **Rule of 2s:** 2% of the population, 2 inches long, 2 feet from the ileocecal valve, 2 types of common ectopic tissue (Gastric/Pancreatic), and presents before age 2. * **Most common presentation:** In children, it is **painless lower GI bleeding** (hematochezia); in adults, it is **intestinal obstruction**. * **Diagnosis:** The investigation of choice for bleeding Meckel’s is a **Technetium-99m pertechnetate scan** (Meckel’s scan), which identifies ectopic gastric mucosa.

Question 429: Which of the following statements regarding stress ulcers is true?

A. Cimetidine should be used prophylactically in intensive care patients to prevent stress ulcers.
B. Stress erosions take days to develop and resolve slowly.
C. Surgery is usually the best way to cure stress ulcers.
D. Stress ulcers most often involve the body and fundus of the stomach. (Correct Answer)

Explanation: **Explanation:** Stress ulcers (Stress-related mucosal disease) are acute gastric mucosal lesions that occur in critically ill patients due to mucosal ischemia and the breakdown of protective barriers. **1. Why Option D is Correct:** Stress ulcers characteristically involve the **acid-secreting portion** of the stomach, specifically the **body and fundus**. Unlike chronic peptic ulcers, which are often solitary and found in the antrum or duodenum, stress ulcers are typically multiple, shallow, and diffuse erosions that spare the antrum. **2. Why Other Options are Incorrect:** * **Option A:** While H2 blockers like Cimetidine were used historically, **Proton Pump Inhibitors (PPIs)** are now the preferred prophylactic agents in ICU settings due to superior efficacy. Furthermore, prophylaxis is only indicated for high-risk patients (e.g., mechanical ventilation >48h, coagulopathy), not every ICU patient. * **Option B:** Stress erosions develop **rapidly**, often within hours of the inciting physiological stress (burns, sepsis, trauma). They also tend to resolve quickly once the primary underlying condition is treated. * **Option C:** Surgery is the **last resort**. Most stress-related bleeding is managed medically (PPIs) or endoscopically. Surgery (e.g., total gastrectomy) is associated with high mortality in these critically ill patients. **Clinical Pearls for NEET-PG:** * **Curling’s Ulcer:** Associated with severe **burns** (mnemonic: Burned by the Curling iron). * **Cushing’s Ulcer:** Associated with **CNS injury/increased intracranial pressure**; these are often deep, prone to perforation, and involve the esophagus, stomach, or duodenum. * **Pathogenesis:** The primary factor is **mucosal hypoperfusion** (ischemia), not necessarily hyperacidity (except in Cushing’s ulcers).

Question 430: What is the most common site of an intra-peritoneal abscess?

A. Morrison's pouch
B. Omental bursa
C. Pelvic region (Correct Answer)
D. Left subhepatic pouch

Explanation: **Explanation:** The **Pelvic region (Pouch of Douglas in females or Rectovesical pouch in males)** is the most common site for intra-peritoneal abscesses. This is primarily due to the effects of **gravity** and the anatomical configuration of the peritoneal cavity. When a patient is in an upright or semi-recumbent position, infected peritoneal fluid or inflammatory exudate naturally drains downward along the paracolic gutters into the most dependent part of the abdomen—the pelvis. Additionally, the pelvis is a frequent site for primary pathologies like appendicitis, diverticulitis, and pelvic inflammatory disease (PID). **Analysis of Incorrect Options:** * **Morrison’s Pouch (Right Subhepatic Space):** While this is the most dependent part of the *upper* abdominal cavity when a patient is supine, it is the second most common site overall. It frequently collects fluid from the gallbladder or perforated duodenal ulcers. * **Omental Bursa (Lesser Sac):** Abscesses here are uncommon and usually secondary to acute pancreatitis (pseudocysts) or posterior gastric wall perforations. * **Left Subhepatic Pouch:** This is a rare site for abscess formation as it is anatomically restricted and does not serve as a primary drainage pathway for gravity-fed fluid. **NEET-PG High-Yield Pearls:** * **Most common site overall:** Pelvic cavity. * **Most common site in the upper abdomen:** Morrison’s pouch (Right subhepatic space). * **Clinical Presentation:** Pelvic abscesses often present with "spurious diarrhea" (mucus discharge) and urinary frequency due to irritation of the rectum and bladder. * **Management:** The preferred treatment for a pelvic abscess is drainage via the rectum (proctotomy) or the posterior vaginal fornix (colpotomy).

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