Gastrointestinal Surgery — MCQs

A 64-year-old woman complains of intermittent abdominal discomfort in the right iliac fossa along with loss of appetite and significant weight loss over 6 months. She presented 2 days later with a cramping abdominal pain at the same location along with diarrhea. During these episodes her husband has commented that she looked red in the face. CECT abdomen was done. Which of the following tumor markers can be seen raised in this condition?

Q716Medium

All of the following are true regarding Early Post-cibal syndrome except:

Q717Medium

Which of the following is NOT a feature of achalasia cardia?

Q718Medium

Which of the following is TRUE about paraesophageal hernia?

Q719Easy

The Le-Veen shunt in ascites is done between the peritoneal cavity and which of the following structures?

Q720Medium

Spastic ileus is typically seen in which of the following conditions?

Gastrointestinal Surgery Indian Medical PG Practice Questions and MCQs

Question 711: Rectal polyps usually present with:

A. Obstruction
B. Perforation
C. Bleeding (Correct Answer)
D. Malignant change

Explanation: **Explanation:** **1. Why Bleeding is the Correct Answer:** The most common clinical presentation of rectal polyps is **painless hematochezia** (bright red blood per rectum). Polyps are protrusions from the mucosal surface that are highly vascular. As fecal matter passes through the rectum, it causes mechanical trauma and friction against the polypoid tissue, leading to surface erosion and subsequent bleeding. In pediatric populations, a juvenile polyp (the most common type) often presents with "fresh" blood coating the stool or even auto-amputation and prolapse. **2. Why Other Options are Incorrect:** * **Obstruction (A):** While very large villous adenomas or multiple polyps (as in FAP) can theoretically cause a partial blockage or lead to intussusception, this is a rare presentation compared to bleeding. * **Perforation (B):** Spontaneous perforation of a polyp is almost never seen. Perforation is typically a complication of therapeutic intervention (polypectomy) rather than a presenting symptom. * **Malignant change (D):** While certain polyps (adenomatous) are precursors to colorectal cancer (the adenoma-carcinoma sequence), malignancy is a **sequela** or a pathological transformation rather than a "presenting symptom." Most polyps are discovered due to bleeding before they turn malignant. **Clinical Pearls for NEET-PG:** * **Juvenile Polyps:** The most common cause of rectal bleeding in children; usually solitary and hamartomatous. * **Villous Adenomas:** These have the highest risk of malignancy and can uniquely present with **secretory diarrhea** leading to hypokalemia (depletion of water and electrolytes). * **Gold Standard Investigation:** Colonoscopy is the investigation of choice for both diagnosis and therapeutic excision (polypectomy). * **Rule of Thumb:** Any adult presenting with rectal bleeding must be evaluated to rule out malignancy, starting with a Digital Rectal Examination (DRE) and Proctosigmoidoscopy.

Question 712: What is the appropriate treatment for a 24-year-old male diagnosed with appendicular carcinoma measuring 3 cm x 2 cm?

A. Right hemicolectomy (Correct Answer)
B. Appendicectomy
C. Cecal resection
D. Radiotherapy

Explanation: **Explanation:** The management of appendiceal adenocarcinoma (appendicular carcinoma) is primarily determined by the size and location of the tumor. For a 24-year-old male with a tumor measuring **3 cm x 2 cm**, the standard of care is a **Right Hemicolectomy**. **Why Right Hemicolectomy is correct:** According to surgical guidelines, an appendicectomy alone is insufficient for tumors **>2 cm** in size. A right hemicolectomy is mandatory in these cases to ensure adequate oncological clearance of the regional lymph nodes (ileocolic chain) and to achieve negative margins, as these tumors behave similarly to colonic adenocarcinomas. **Why other options are incorrect:** * **Appendicectomy:** This is only considered adequate for small, well-differentiated tumors **<1 cm** located at the tip of the appendix with no lymphovascular invasion. * **Cecal resection:** This is an inadequate oncological procedure as it does not address the lymphatic drainage of the appendix. * **Radiotherapy:** Appendiceal adenocarcinoma is primarily a surgical disease; radiotherapy is not a primary treatment modality for localized appendicular carcinoma. **High-Yield Clinical Pearls for NEET-PG:** * **Size Criteria:** <1 cm (Appendicectomy); >2 cm (Right Hemicolectomy); 1–2 cm (Individualized based on features like high grade, lymphovascular invasion, or involvement of the base). * **Most common site:** The tip of the appendix (especially for carcinoids). * **Most common tumor of the appendix:** Carcinoid tumor (Neuroendocrine tumor). * **Goblet cell carcinoids:** These are aggressive and always require a right hemicolectomy regardless of size.

Question 713: A 29-year-old lady presents with fresh bleed per rectum and abdominal pain. Upper GI endoscopy and colonoscopy revealed only blood in the right colon and at the ileocecal valve. What is the most appropriate investigation in this scenario?

A. Small-bowel enteroclysis
B. Angiography
C. Small-bowel endoscopy
D. Technetium-99m pertechnetate scan (Correct Answer)

Explanation: ### Explanation The clinical presentation describes a young adult with **obscure gastrointestinal bleeding** (negative upper GI endoscopy and colonoscopy) where blood is localized to the ileocecal valve. In a young patient, the most common cause of painless or painful lower GI bleeding originating from the distal ileum is a **Meckel’s Diverticulum**. **1. Why Technetium-99m Pertechnetate Scan is Correct:** Meckel’s diverticulum often contains **ectopic gastric mucosa** (seen in ~50% of symptomatic cases). The Technetium-99m pertechnetate isotope is selectively taken up by the mucous-secreting cells of the gastric mucosa. This scan (also known as a **Meckel’s scan**) is the investigation of choice in children and young adults for diagnosing a bleeding Meckel’s diverticulum due to its high sensitivity and non-invasive nature. **2. Why Other Options are Incorrect:** * **Small-bowel enteroclysis:** This is a double-contrast radiological study primarily used for detecting structural lesions like tumors or strictures; it is poor at identifying small mucosal lesions or active bleeding sources. * **Angiography:** This is typically reserved for **active, brisk bleeding** (rate >0.5 ml/min). While it can localize a bleed, it is invasive and less specific for Meckel’s in a stable young patient compared to a nuclear scan. * **Small-bowel endoscopy (Enteroscopy):** While useful for visualizing the small bowel, it is technically demanding, time-consuming, and often unavailable in acute settings. It is usually considered after a Meckel's scan is negative. **Clinical Pearls for NEET-PG:** * **Rule of 2s for Meckel’s:** 2% of the population, 2 inches long, 2 feet from the ileocecal valve, 2 types of ectopic tissue (Gastric > Pancreatic), and presents before age 2. * **Most common presentation:** In children, it is **painless bleeding** (maroon stools); in adults, it is **intestinal obstruction**. * **Meckel’s Scan Enhancement:** Sensitivity can be increased by administering **H2 blockers (Cimetidine)**, **Pentagastrin**, or **Glucagon**, which enhance isotope retention in the gastric mucosa.

Question 714: Gastric ulcer type III is located at which anatomical region?

A. Lesser curvature
B. Body of stomach
C. Prepyloric region (Correct Answer)
D. Gastroesophageal junction

Explanation: ### Explanation The classification of gastric ulcers is based on the **Johnson Classification**, which categorizes ulcers according to their anatomical location and associated acid secretion patterns. This is a high-yield topic for NEET-PG as it dictates surgical management. **Why Option C is Correct:** **Type III ulcers** are located in the **prepyloric region** (within 3 cm of the pylorus). Unlike Type I ulcers, Type III ulcers are associated with **gastric acid hypersecretion**, similar to duodenal ulcers. Because of this high acid state, surgical treatment often requires an acid-reducing procedure (like a vagotomy) in addition to antrectomy. **Analysis of Incorrect Options:** * **Option A (Lesser Curvature):** This describes **Type I** ulcers. Located near the incisura angularis, these are the most common type and are typically associated with low to normal acid secretion. * **Option B (Body of Stomach):** While Type I and Type IV occur in the body, **Type II** ulcers specifically involve two locations: one in the body (lesser curvature) and a concurrent ulcer in the duodenum. * **Option D (Gastroesophageal Junction):** This describes **Type IV** ulcers. These are located high on the lesser curvature, near the GE junction. They are technically difficult to manage surgically due to their proximal location. **Clinical Pearls for NEET-PG:** * **Type I:** Most common; normal/low acid. * **Type II & III:** Associated with **hypersecretion** of acid and often linked to *H. pylori*. * **Type IV:** Most difficult to treat surgically (may require a Csendes procedure). * **Type V:** Associated with chronic **NSAID use**; can occur anywhere in the stomach. * **Mnemonic:** "1 and 4 are low (acid), 2 and 3 are high (acid)."

Question 715: A 64-year-old woman complains of intermittent abdominal discomfort in the right iliac fossa along with loss of appetite and significant weight loss over 6 months. She presented 2 days later with a cramping abdominal pain at the same location along with diarrhea. During these episodes her husband has commented that she looked red in the face. CECT abdomen was done. Which of the following tumor markers can be seen raised in this condition?

A. Synaptophysin (Correct Answer)
B. AFP
C. HCG
D. CEA

Explanation: ### Explanation **Diagnosis: Carcinoid Tumor (Neuroendocrine Tumor)** The clinical presentation of a mass in the right iliac fossa (likely the **terminal ileum or appendix**), weight loss, and intermittent abdominal pain, combined with **episodic facial flushing** (Carcinoid Syndrome), is classic for a Neuroendocrine Tumor (NET). Carcinoid syndrome typically occurs when a NET has metastasized to the liver, allowing vasoactive substances like serotonin and bradykinin to bypass hepatic metabolism and enter the systemic circulation. **1. Why Synaptophysin is Correct:** Neuroendocrine tumors are derived from the diffuse neuroendocrine system (Kulchitsky cells). **Synaptophysin** and **Chromogranin A** are the most sensitive and specific immunohistochemical (IHC) markers used to identify the neuroendocrine origin of these cells. While 5-HIAA (urinary metabolite) is used for biochemical diagnosis, Synaptophysin is the definitive tissue marker. **2. Why the Other Options are Incorrect:** * **AFP (Alpha-fetoprotein):** A marker for Hepatocellular Carcinoma (HCC) and certain germ cell tumors (Yolk sac tumor). * **HCG (Human Chorionic Gonadotropin):** A marker for Choriocarcinoma and certain germ cell tumors. * **CEA (Carcinoembryonic Antigen):** Primarily used for monitoring Colorectal Adenocarcinoma. While it can be elevated in many GI malignancies, it is not a specific marker for neuroendocrine tumors. **Clinical Pearls for NEET-PG:** * **Most common site for NET:** Small Intestine (specifically the distal ileum), followed by the Rectum and Appendix. * **Carcinoid Syndrome Triad:** Flushing, Diarrhea, and Right-sided Valvular Heart Disease (Tricuspid Regurgitation/Pulmonary Stenosis). * **Diagnostic Gold Standard:** 24-hour urinary **5-HIAA** levels. * **Imaging:** **68Ga-DOTATATE PET/CT** is the most sensitive imaging modality for localizing NETs.

Question 716: All of the following are true regarding Early Post-cibal syndrome except:

A. Distension of abdomen
B. Managed conservatively
C. Hypermotility of intestine is common
D. Surgery is usually indicated (Correct Answer)

Explanation: **Explanation:** Early Post-cibal syndrome (Early Dumping Syndrome) occurs due to the rapid emptying of hypertonic food boluses into the small intestine, typically following gastric surgeries like Billroth I/II or Roux-en-Y gastric bypass. **Why Option D is the Correct Answer (The Exception):** Surgery is **not** usually indicated for Early Dumping Syndrome. Approximately **80-90% of cases are successfully managed conservatively** with dietary modifications. Surgical intervention (such as converting a Billroth II to a Roux-en-Y or reversing a bypass) is reserved only for the small minority of patients who remain severely symptomatic and malnourished despite exhaustive medical therapy for at least 6–12 months. **Analysis of Incorrect Options:** * **A. Distension of abdomen:** The hypertonic load in the duodenum/jejunum draws fluid from the intravascular space into the lumen (osmotic shift). This leads to acute intestinal distension, which triggers both abdominal pain and autonomic symptoms. * **B. Managed conservatively:** This is the gold standard. Management includes small, frequent, dry meals (separating solids and liquids), high-protein/low-carbohydrate diets, and lying down after eating to slow gastric emptying. * **C. Hypermotility of intestine:** The rapid fluid shift and release of gastrointestinal hormones (like serotonin, kinins, and GLP-1) stimulate hypermotility, leading to characteristic symptoms like cramping and diarrhea. **Clinical Pearls for NEET-PG:** * **Timing:** Early Dumping occurs **15–30 minutes** after a meal (vasomotor + GI symptoms). Late Dumping occurs **1–3 hours** later (due to reactive hypoglycemia). * **Drug of Choice:** If dietary changes fail, **Octreotide** (somatostatin analogue) is the most effective medical treatment. * **Sigstad’s Score:** Used clinically to diagnose and assess the severity of dumping syndrome.

Question 717: Which of the following is NOT a feature of achalasia cardia?

A. Increasing difficulty in swallowing more for liquids than for solids
B. Regurgitant vomiting
C. Dilated and tortuous esophagus
D. Filling defect on barium study (Correct Answer)

Explanation: **Explanation:** Achalasia cardia 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 lower two-thirds of the esophagus. **Why "Filling defect on barium study" is the correct answer:** A **filling defect** is a radiological sign typically caused by a space-occupying lesion (like an esophageal tumor or a large polyp) protruding into the lumen. In achalasia, the barium study classically shows a **"Bird’s beak" or "Rat-tail" appearance** due to the persistent narrowing at the gastroesophageal junction. It does not produce a filling defect unless there is a secondary complication like a food bolus or associated malignancy (pseudoachalasia). **Analysis of incorrect options:** * **Option A:** Paradoxical dysphagia (difficulty swallowing **liquids more than solids**) is a classic early feature of motility disorders like achalasia, distinguishing it from mechanical obstructions (like cancer) where dysphagia starts with solids. * **Option B:** Regurgitation of undigested food occurs because the food cannot pass the hypertensive LES and remains stagnant in the esophagus. * **Option C:** In long-standing cases, the esophagus loses all tone and becomes massively dilated and twisted, known as a **"Sigmoid esophagus."** **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Diagnosis:** Esophageal Manometry (shows incomplete LES relaxation and aperistalsis). * **Heller’s Myotomy:** The surgical treatment of choice (usually combined with a partial fundoplication). * **POEM (Per-Oral Endoscopic Myotomy):** A newer, minimally invasive endoscopic treatment. * **Complication:** Increased risk of Squamous Cell Carcinoma due to chronic irritation from stagnant food.

Question 718: Which of the following is TRUE about paraesophageal hernia?

A. Surgery is indicated in all symptomatic cases (Correct Answer)
B. In paraesophageal type, reflux is more common
C. Paraesophageal type is the most common type of congenital hernia
D. There is upward displacement of the cardioesophageal junction

Explanation: **Explanation:** **Paraesophageal Hernia (Type II, III, and IV)** occurs when the gastric fundus or other abdominal viscera herniate into the chest through the esophageal hiatus, while the gastroesophageal junction (GEJ) often remains in its normal anatomical position. 1. **Why Option A is Correct:** Unlike sliding hiatal hernias, paraesophageal hernias carry a high risk of life-threatening complications such as **gastric volvulus, incarceration, strangulation, and perforation**. Therefore, clinical guidelines dictate that **surgery is indicated in all symptomatic patients** to prevent these acute surgical emergencies. While "watchful waiting" may be considered for truly asymptomatic patients, any presence of symptoms (dysphagia, postprandial pain, or anemia) necessitates operative repair. 2. **Why the Other Options are Incorrect:** * **Option B:** Reflux is actually **more common in Sliding Hernias (Type I)** because the GEJ is displaced, disrupting the lower esophageal sphincter mechanism. In pure paraesophageal hernias (Type II), the GEJ remains competent. * **Option C:** Paraesophageal hernia is **not** the most common congenital hernia; it is an acquired defect. Furthermore, among hiatal hernias, the **Sliding Hernia (Type I)** is the most common (approx. 90-95%). * **Option D:** Upward displacement of the cardioesophageal (GE) junction is the hallmark of a **Sliding Hernia**. In a pure Type II paraesophageal hernia, the GE junction remains fixed at the level of the diaphragm. **Clinical Pearls for NEET-PG:** * **Cameron Ulcers:** Linear gastric erosions found in the mucosal folds of a large hiatal hernia, often causing chronic occult GI bleed and iron deficiency anemia. * **Borchardt’s Triad:** Diagnostic for acute gastric volvulus (a complication of Type II/III hernias): 1. Epigastric pain, 2. Inability to vomit, 3. Inability to pass a nasogastric tube. * **Surgical Approach:** Usually involves reduction of contents, sac excision, and **cruroplasty** (hiatal repair), often with a fundoplication.

Question 719: The Le-Veen shunt in ascites is done between the peritoneal cavity and which of the following structures?

A. Cisterna chyli
B. Renal pelvis
C. Superior vena cava (Correct Answer)
D. Gall bladder

Explanation: **Explanation:** The **LeVeen shunt** is a type of peritoneovenous shunt used in the management of refractory ascites. The underlying medical concept is to create a pressure-sensitive conduit that drains excess ascitic fluid from the high-pressure peritoneal cavity directly back into the low-pressure systemic venous circulation. * **Why Option C is Correct:** The shunt consists of a multi-perforated intra-abdominal tube connected to a one-way, pressure-activated valve. This valve leads to a long silicone tube tunneled subcutaneously, which is inserted into the internal jugular vein and advanced until the tip reaches the **Superior Vena Cava (SVC)**. This allows the ascitic fluid to be reinfused into the central venous system, increasing effective arterial blood volume and improving renal perfusion. **Why the other options are incorrect:** * **A. Cisterna chyli:** This is the dilated origin of the thoracic duct. While it carries lymph, it is not a feasible or anatomically practical site for a surgical shunt to handle large volumes of ascitic fluid. * **B. Renal pelvis:** Shunting to the renal pelvis (e.g., the historical Heile-Neumann procedure) is obsolete and was associated with severe electrolyte imbalances and infections. * **D. Gall bladder:** The gallbladder has no physiological role in draining peritoneal fluid; such a shunt would lead to biliary complications. **Clinical Pearls for NEET-PG:** * **Denver Shunt:** Similar to the LeVeen shunt but includes a small subcutaneous pump chamber that can be manually compressed to clear fibrin clots. * **Indications:** Refractory ascites not responding to diuretics or repeated paracentesis. * **Complications:** The most common complication is **shunt occlusion** (due to fibrin/debris). The most serious complications include **Disseminated Intravascular Coagulation (DIC)**, fluid overload, and infection (peritonitis). * **Current Status:** These shunts have largely been replaced by **TIPS (Transjugular Intrahepatic Portosystemic Shunt)** in modern practice.

Question 720: Spastic ileus is typically seen in which of the following conditions?

A. Porphyria (Correct Answer)
B. Retroperitoneal abscess
C. Hypokalemia
D. Myocardial infarction

Explanation: **Explanation:** **Spastic ileus** is a rare form of functional bowel obstruction where the intestinal wall undergoes prolonged, segmental contraction (spasm), preventing the normal passage of contents. This is the opposite of the more common **adynamic (paralytic) ileus**, where the bowel is flaccid and aperistaltic. **Why Porphyria is correct:** In **Acute Intermittent Porphyria (AIP)**, autonomic neuropathy leads to erratic neurological discharge to the gut. This causes intense, uncoordinated smooth muscle contractions (spasticity). This spastic ileus is a classic cause of the severe, poorly localized abdominal pain seen in porphyric crises. Other causes of spastic ileus include heavy metal poisoning (lead) and uremia. **Analysis of Incorrect Options:** * **Retroperitoneal abscess:** This causes **adynamic (paralytic) ileus** due to local inflammatory irritation of the retroperitoneal nerves and the peritoneum. * **Hypokalemia:** Low potassium levels hyperpolarize the smooth muscle membrane, making it less excitable. This leads to decreased peristalsis and **paralytic ileus**. * **Myocardial infarction:** Inferior wall MI can cause reflex **paralytic ileus** via the autonomic nervous system or as a result of systemic shock/hypoperfusion. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause of paralytic ileus:** Post-operative state (usually resolves in 48–72 hours). * **Metabolic causes of paralytic ileus:** Hypokalemia (most common), hyponatremia, and hypercalcemia. * **Lead Poisoning:** Look for "Burtonian lines" on gums and "Basophilic stippling" on RBCs; it is a classic differential for spastic ileus alongside Porphyria. * **Porphyria Triad:** Abdominal pain, neuropsychiatric symptoms, and port-wine colored urine.

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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