Gastrointestinal Surgery Practice Questions

Q: What is the most common cause of isolated gastric varices?

Splenic vein thrombosis. **Explanation:** The presence of **isolated gastric varices (IGV)** in the absence of esophageal varices is a classic clinical hallmark of **left-sided (sinistral) portal hypertension**. **1. Why Splenic Vein Thrombosis (SVT) is correct:** The splenic vein drains the spleen and receives blood from the short gastric veins. When the splenic vein is obstructed (most commonly due to **chronic pancreatitis**, pancreatic pseudocysts, or pancreatic tumors), blood is diverted through the **short gastric veins** into the submucosal veins of the gastric fundus to reach the portal system. This increased pressure leads to the formation of isolated gastric varices. Unlike generalized portal hypertension (cirrhosis), the pressure in the rest of the portal system remains normal, which is why esophageal varices are typically absent. **2. Analysis of Incorrect Options:** * **Option A (Profuse bleeding):** While gastric varices can bleed more severely than esophageal varices, "profuse bleeding" is a clinical presentation/complication, not a cause. * **Option C (EUS vs. Endoscopy):** This is a diagnostic comparison. While EUS is highly sensitive for detecting underlying vessels, it is not a "cause" of the condition. * **Option D (Single treatment):** This is a statement regarding management (often involving cyanoacrylate glue or splenectomy). It does not address the etiology. **High-Yield Pearls for NEET-PG:** * **Most common cause of SVT:** Chronic Pancreatitis. * **Definitive Treatment:** Splenectomy is curative for IGV caused by SVT. * **Classification:** Gastric varices are classified by the **Sarin Classification** (IGV Type 1 are located in the fundus). * **Medical Management:** Endoscopic injection of **N-butyl-2-cyanoacrylate** (glue) is the preferred endoscopic intervention for bleeding gastric varices.

Q: On colonoscopy, which of the following findings is associated with the highest malignancy potential?

Hundreds of multiple flat polyps. **Explanation:** The malignant potential of a colonic polyp is determined by three main factors: **histology** (villous > tubular), **size** (>2 cm), and **morphology/quantity**. **Why Option B is Correct:** The presence of **hundreds of polyps** is the hallmark of **Familial Adenomatous Polyposis (FAP)**, an autosomal dominant condition caused by a mutation in the *APC* gene. In FAP, the risk of developing colorectal cancer is virtually **100%** by age 40 if a prophylactic colectomy is not performed. Furthermore, **flat (sessile) polyps** carry a higher risk of malignancy compared to pedunculated ones because they are harder to detect, more likely to contain advanced histology (like serrated or villous features), and have a direct pathway for invasion into the submucosa due to the lack of a stalk. **Analysis of Incorrect Options:** * **A & C (Pedunculated Polyps):** These polyps have a fibrovascular stalk. The stalk acts as a "buffer" zone; even if the head of the polyp contains carcinoma, it is considered early-stage if it hasn't invaded the stalk. They are generally easier to resect and have lower risk than flat lesions. * **D (Solitary Flat Polyp):** While a flat morphology is concerning, a single polyp (unless very large) has a significantly lower cumulative risk of transformation compared to the "hundreds" seen in polyposis syndromes. **High-Yield Clinical Pearls for NEET-PG:** * **FAP:** Requires >100 polyps for diagnosis. Most common extra-colonic manifestation: **Duodenal adenomas**. * **Gardner Syndrome:** FAP + Osteomas + Soft tissue tumors (Desmoid tumors). * **Turcot Syndrome:** FAP/HNPCC + CNS tumors (Medulloblastoma/Glioblastoma). * **Villous Adenomas:** Have the highest risk of malignancy among histological types ("Villous is Villainous").

Q: Which of the following is true about early gastric cancer?

Limited to mucosa and submucosa. **Explanation:** **Early Gastric Cancer (EGC)** is defined by its depth of invasion rather than its size or the presence of lymph node metastasis. 1. **Why Option D is Correct:** By definition, Early Gastric Cancer is a lesion that is **confined to the mucosa (M) or submucosa (SM)**, regardless of the status of regional lymph node metastasis. This definition is crucial because the 5-year survival rate for EGC is excellent (over 90-95%) compared to advanced gastric cancer. 2. **Why Other Options are Incorrect:** * **Option A:** If the tumor reaches the **serosa**, it is classified as T4a (Advanced Gastric Cancer). EGC must not extend beyond the submucosa. * **Option B:** The primary treatment for EGC is **surgical resection** (Gastrectomy with D1/D2 lymphadenectomy) or **Endoscopic Mucosal Resection (EMR/ESD)** for very early lesions. Chemotherapy is generally reserved for advanced or metastatic stages. * **Option C:** Lymph node metastasis is **not always present**. In fact, only about 5–10% of mucosal EGCs and 15–20% of submucosal EGCs have lymph node involvement. Its presence does not change the diagnosis from "Early" to "Advanced." **High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** The lesser curvature of the antrum. * **Japanese Endoscopic Classification:** EGC is classified into Type I (Protruded), Type II (Superficial: a-elevated, b-flat, c-depressed), and Type III (Excavated). **Type IIc** is the most common variety. * **Prognosis:** The most important prognostic factor in gastric cancer is the **stage of the disease** (depth of invasion and nodal status). * **Treatment Gold Standard:** Endoscopic Submucosal Dissection (ESD) is preferred for mucosal lesions without ulceration, as it allows for en-bloc resection.

Q: Which of the following statements is NOT true regarding dumping syndrome?

Presence of hypoosmolar content in the small bowel.. ### Explanation **Dumping Syndrome** occurs most commonly as a complication of gastric surgeries (like Billroth I/II or Roux-en-Y gastric bypass) that involve the bypass, removal, or destruction of the pyloric sphincter. **1. Why Option B is the Correct Answer (The False Statement):** The physiological hallmark of dumping syndrome is the rapid emptying of **hyperosmolar** chyme into the small intestine. This hyperosmolar load (rich in simple carbohydrates) draws fluid from the intravascular compartment into the intestinal lumen via osmosis. This leads to intestinal distension and vasomotor symptoms. Therefore, the presence of **hypoosmolar** content is incorrect. **2. Analysis of Other Options:** * **Option A:** This is a true statement. The high osmolarity of the food bolus is the primary trigger for the fluid shift that causes early dumping. * **Option C:** This is a true statement. The pylorus normally acts as a regulator, allowing only small amounts of food into the duodenum. Its destruction or bypass is the anatomical prerequisite for dumping syndrome. **Clinical Pearls for NEET-PG:** * **Early Dumping (75%):** Occurs 15–30 minutes post-prandially. Symptoms include palpitations, tachycardia, diaphoresis (vasomotor), and colicky pain/diarrhea (gastrointestinal). * **Late Dumping (25%):** Occurs 1–3 hours post-prandially. It is caused by **reactive hypoglycemia** due to an exaggerated insulin surge in response to rapid glucose absorption. * **Management:** First-line treatment is **dietary modification** (small, frequent, high-protein, low-carb meals; avoiding liquids during meals). * **Medical Therapy:** **Octreotide** (somatostatin analogue) is the drug of choice for refractory cases.

Q: Osteomas, adenomatous polyps of intestine, and periampullary carcinomas are seen in which of the following conditions?

Gardner syndrome. **Explanation:** The correct answer is **Gardner syndrome**. This condition is a clinical variant of **Familial Adenomatous Polyposis (FAP)**, caused by a germline mutation in the **APC gene** on chromosome 5q21. While classic FAP is characterized primarily by hundreds to thousands of colonic adenomas, Gardner syndrome is distinguished by its specific **extracolonic manifestations**, forming the triad of: 1. **Intestinal Polyposis:** Adenomatous polyps with a 100% risk of progression to colorectal cancer. 2. **Skeletal Abnormalities:** Multiple **osteomas** (most commonly in the mandible and skull). 3. **Soft Tissue Tumors:** Epidermoid cysts, fibromas, and **desmoid tumors** (a significant cause of morbidity). Additionally, patients are at high risk for **periampullary carcinoma** (duodenal/ampullary adenocarcinoma), which is the leading cause of death in these patients after prophylactic colectomy. **Why other options are incorrect:** * **Cowden syndrome:** A PTEN hamartoma tumor syndrome characterized by multiple trichilemmomas, breast cancer, and thyroid cancer, but not osteomas or diffuse intestinal adenomas. * **Peutz–Jeghers syndrome:** Characterized by **hamartomatous** (not adenomatous) polyps and mucocutaneous hyperpigmentation. * **Familial Adenomatous Polyposis (FAP):** While Gardner is a subtype of FAP, the specific combination of osteomas and soft tissue tumors specifically defines the Gardner variant in clinical exams. **High-Yield Clinical Pearls for NEET-PG:** * **CHRPE** (Congenital Hypertrophy of Retinal Pigment Epithelium) is the earliest detectable sign of FAP/Gardner syndrome. * **Turcot Syndrome:** FAP/HNPCC associated with CNS tumors (Medulloblastoma/Glioblastoma). * **Management:** Prophylactic **Total Proctocolectomy** is the treatment of choice for the colon, usually performed in the late teens or early twenties.

Q: All are indications for surgery in ulcerative colitis except?

Primary sclerosing cholangitis. **Explanation:** In Ulcerative Colitis (UC), surgery is indicated when medical management fails or when life-threatening complications arise. **Why Primary Sclerosing Cholangitis (PSC) is the correct answer:** PSC is an extra-intestinal manifestation of UC. Unlike other manifestations (like peripheral arthritis or erythema nodosum), **PSC does not improve or resolve after a total proctocolectomy.** The progression of biliary cirrhosis and the risk of cholangiocarcinoma remain independent of the presence of the colon. Therefore, PSC is not an indication for surgery in UC. **Why the other options are incorrect (Indications for surgery):** * **Dysplasia/Carcinoma:** UC is a premalignant condition. The discovery of high-grade dysplasia, multifocal low-grade dysplasia, or frank adenocarcinoma is an absolute indication for total proctocolectomy. * **Massive Colonic Bleeding:** While rare in UC, life-threatening hemorrhage that cannot be controlled endoscopically or medically requires emergency surgical intervention. * **Toxic Megacolon:** This is a surgical emergency. If the colonic diameter exceeds 6 cm and there is no improvement within 24–72 hours of intensive medical therapy (or if perforation occurs), surgery is mandatory. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Surgery:** Restorative Proctocolectomy with **Ileal Pouch-Anal Anastomosis (IPAA)** is the procedure of choice for elective cases. * **Emergency Surgery:** Subtotal colectomy with end-ileostomy is preferred in the emergency setting (e.g., toxic megacolon). * **Intractable Disease:** The most common overall indication for surgery is chronic symptoms refractory to maximal medical therapy. * **Cancer Risk:** Increases significantly after 8–10 years of pancolitis.

Q: An elderly man presented with sigmoid volvulus, which was successfully detorsed. What is the next definitive management step?

Observation for recurrence. **Explanation:** The management of sigmoid volvulus depends on the clinical stability of the patient and the presence of gangrene. In a stable patient without signs of peritonitis, the initial treatment of choice is **sigmoidoscopic detorsion** (using a flatus tube). **Why Option A is correct:** Once successful detorsion is achieved, the immediate crisis is averted. However, sigmoid volvulus has a high recurrence rate (up to 40-60%). The "definitive" management to prevent recurrence is a **semi-elective sigmoid resection** during the same hospital admission (usually after 48–72 hours of bowel preparation). In the context of this specific question and its options, **Observation for recurrence** is the most appropriate step following successful detorsion before proceeding to definitive surgery. It allows the bowel edema to subside and the patient to be optimized. **Why other options are incorrect:** * **B. Immediate resection:** Emergency surgery in a non-gangrenous, unprepared bowel carries high morbidity and mortality. Resection is only "immediate" if there is evidence of gangrene or perforation. * **C. Resection if volvulus recurs:** Waiting for a recurrence is dangerous. Each episode of volvulus carries a risk of strangulation and gangrene; therefore, prophylactic resection is indicated after the first successful detorsion. **Clinical Pearls for NEET-PG:** * **Classic X-ray Sign:** "Coffee bean sign" or "Omega sign." * **Barium Enema:** "Bird’s beak" or "Ace of Spades" appearance. * **Treatment of Choice (Stable):** Sigmoidoscopic detorsion + Flatus tube insertion. * **Treatment of Choice (Gangrenous/Unstable):** Hartmann’s Procedure (Resection with end-colostomy). * **Definitive Procedure:** Sigmoid colectomy with primary anastomosis (Elective/Semi-elective).

Question 1

A 74-year-old woman presents with a 10-year history of intermittent lower abdominal pain, characterized by colicky nature and a feeling of distension in the left iliac fossa. The pain is relieved by passing flatus or feces. She experiences constipation and passes small pieces of feces. On examination, a vague mass was felt in the left iliac fossa, with no guarding or rebound tenderness, and normal bowel sounds. Investigations included a barium enema and intestinal biopsy. Colonoscopy ruled out colonic neoplasm. Which of the following procedures can be used in this condition?

Accepted Answer

All of the above

Answer

Hamann's procedure

Answer

Washout with proximal diversion

Answer

Percutaneous drainage followed by colonic resection

Question 2

What is the most common cause of isolated gastric varices?

Accepted Answer

Splenic vein thrombosis

Answer

Profuse bleeding

Answer

Endoscopic ultrasound (EUS) is better than endoscopy

Answer

A single treatment can lead to eradication

Question 3

On colonoscopy, which of the following findings is associated with the highest malignancy potential?

Accepted Answer

Hundreds of multiple flat polyps

Answer

A single pedunculated polyp

Answer

Multiple pedunculated polyps

Answer

A solitary flat polyp

Question 4

While performing a radical gastrectomy for a 2 x 2 cm antral adenocarcinoma, which of the following structures is NOT typically removed?

Accepted Answer

Lymph nodes along the left gastric, common hepatic, and splenic arteries

Answer

Distal two-thirds of the stomach with a one-centimeter cuff of the duodenum

Answer

Lesser and greater omentum

Answer

Spleen

Question 5

Which of the following is true about early gastric cancer?

Accepted Answer

Limited to mucosa and submucosa

Answer

Limited to serosa

Answer

Chemotherapy is the primary treatment

Answer

Lymph node metastasis is always present

Question 6

Which of the following statements is NOT true regarding dumping syndrome?

Accepted Answer

Presence of hypoosmolar content in the small bowel.

Answer

Presence of hyperosmolar content in the small bowel.

Answer

Occurs due to the destruction of the pyloric sphincter.

Answer

None of the above.

Question 7

Osteomas, adenomatous polyps of intestine, and periampullary carcinomas are seen in which of the following conditions?

Accepted Answer

Gardner syndrome

Answer

Cowden syndrome

Answer

Peutz–Jeghers syndrome

Answer

Familial adenomatous polyposis (FAP)

Question 8

All are indications for surgery in ulcerative colitis except?

Accepted Answer

Primary sclerosing cholangitis

Answer

Dysplasia, carcinoma

Answer

Massive colonic bleeding

Answer

Toxic megacolon

Question 9

An elderly man presented with sigmoid volvulus, which was successfully detorsed. What is the next definitive management step?

Accepted Answer

Observation for recurrence

Answer

Immediate resection

Answer

Resection if volvulus recurs

Answer

None of the above

Question 10

What is the most common site of carcinoma of the stomach?

Accepted Answer

Proximal stomach

Answer

Distal stomach

Answer

Lesser curvature

Answer

Greater curvature

Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery — MCQs

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