Gastrointestinal Surgery Practice Questions

Q: What is the primary indication for fundoplication?

Gastroesophageal reflux disease (GERD). **Explanation:** **1. Why Option A is Correct:** Fundoplication (most commonly **Nissen’s 360° wrap**) is the gold-standard surgical treatment for **Gastroesophageal Reflux Disease (GERD)**. The procedure involves wrapping the gastric fundus around the lower esophagus to reinforce the Lower Esophageal Sphincter (LES) pressure and restore the intra-abdominal length of the esophagus. It is indicated when medical management (PPIs) fails, in cases of extra-esophageal symptoms, or when complications like Barrett’s esophagus or strictures develop. **2. Why Other Options are Incorrect:** * **B. Gastric Volvulus:** The primary surgical management involves detorsion (unwinding), gastropexy (fixing the stomach to the abdominal wall), and repair of any associated hiatal defect. * **C. Diaphragmatic Eventration:** This is a condition where the diaphragm is thin and elevated but intact. The surgical treatment of choice is **Plication of the Diaphragm**, which flattens the dome to allow lung expansion. * **D. Bochdalek’s Hernia:** This is a congenital posterolateral diaphragmatic hernia. Management involves reduction of contents and primary repair of the diaphragmatic defect (often via a subcostal incision in neonates). **Clinical Pearls for NEET-PG:** * **Nissen Fundoplication:** A 360° total wrap; the most common complication is "Gas-bloat syndrome." * **Partial Wraps:** Used if esophageal motility is poor (e.g., **Toupet** [270° posterior] or **Dor** [180° anterior]). * **DeMeester Score:** A score >14.72 on 24-hour pH monitoring is the objective gold standard for diagnosing GERD before surgery. * **Hill’s Procedure:** An alternative surgery involving posterior gastropexy.

Q: Linitis plastica is characteristic of which of the following?

Stomach cancer. **Explanation:** **Linitis plastica** (also known as "leather bottle stomach") is a morphological variant of **gastric adenocarcinoma**, specifically the **diffuse type** (Lauren classification). 1. **Why Stomach Cancer is correct:** In this condition, the tumor cells (often **signet ring cells**) infiltrate the submucosa and muscularis propria of the stomach wall. This triggers an intense **desmoplastic reaction** (fibrosis), leading to a marked thickening and rigidity of the gastric wall. On imaging or gross examination, the stomach appears shrunken and fails to distend, resembling a rigid leather bottle. It is associated with a poor prognosis and often involves a mutation in the **E-cadherin (CDH1)** gene. 2. **Why other options are incorrect:** * **Gallbladder cancer:** Typically presents as a focal mass or wall thickening but does not exhibit the diffuse "leather bottle" infiltration characteristic of linitis plastica. * **Pancreatic cancer:** Usually presents as a localized mass in the head of the pancreas causing obstructive jaundice; it does not involve diffuse hollow viscus stiffening. * **Renal cell cancer:** A solid organ malignancy that presents with the triad of hematuria, flank pain, and a palpable mass, rather than diffuse transmural fibrosis. **High-Yield Clinical Pearls for NEET-PG:** * **Lauren Classification:** Linitis plastica is the hallmark of the **Diffuse type**, which is more common in younger patients and females, and is *not* associated with H. pylori (unlike the Intestinal type). * **Barium Swallow Finding:** Shows a "narrowed, rigid, tubular stomach" with loss of normal mucosal folds. * **Microscopy:** Look for **Signet ring cells** (nucleus pushed to the periphery by a large mucin vacuole). * **Genetic Link:** Strongly associated with **CDH1 gene** mutations and Hereditary Diffuse Gastric Cancer (HDGC) syndrome.

Q: Corkscrew esophagus in barium swallow is characteristic of which of the following conditions?

Diffuse esophageal spasm. ### Explanation **Correct Answer: C. Diffuse esophageal spasm (DES)** **Why it is correct:** Diffuse esophageal spasm is a motility disorder characterized by high-amplitude, non-peristaltic (uncoordinated) contractions of the esophageal smooth muscle. On a **Barium Swallow**, these simultaneous contractions compartmentalize the esophagus into multiple segments, creating a classic undulating appearance known as a **"Corkscrew esophagus"** or **"Rosary bead esophagus."** Clinically, patients present with intermittent chest pain (mimicking angina) and dysphagia to both solids and liquids. **Why the other options are incorrect:** * **Achalasia cardia:** Characterized by a failure of the Lower Esophageal Sphincter (LES) to relax and absent peristalsis. The classic Barium Swallow finding is a **"Bird’s beak"** or "Rat-tail" appearance due to a dilated proximal esophagus and a narrow distal segment. * **Esophageal cancer:** Typically presents with an irregular, eccentric narrowing of the lumen. The classic radiological sign is an **"Apple-core" appearance** or a "Shouldering effect" due to the malignant mass. * **Diverticulum:** This refers to an outpouching of the esophageal wall. For example, **Zenker’s diverticulum** (a pulsion diverticulum through Killian’s dehiscence) appears as a contrast-filled sac posterior to the esophagus. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** Manometry is the most sensitive test for DES, showing repetitive, high-amplitude, simultaneous contractions (>20% of swallows). * **Treatment:** First-line includes Calcium Channel Blockers (CCBs) or Nitrates to relax smooth muscle. Surgical option: Long Esophageal Myotomy. * **Nutcracker Esophagus:** Often confused with DES; it involves high-pressure peristaltic waves (>180 mmHg) rather than uncoordinated ones. It does *not* typically show a corkscrew appearance.

Q: In abdominal surgery, Lembert sutures refer to which type of suturing?

Sero-muscular sutures. **Explanation:** The **Lembert suture** is a fundamental technique in gastrointestinal surgery, primarily used for intestinal anastomosis. **1. Why Option B is Correct:** The Lembert suture is a **sero-muscular** (extramucosal) suture. It is an **inverting** technique where the needle passes through the serosa and muscularis layers, intentionally skipping the submucosa and mucosa. By picking up these outer layers, the suture causes the edges of the bowel to turn inward (inversion), ensuring serosa-to-serosa apposition. This is critical because serosal surfaces heal rapidly by forming a fibrin seal, preventing leaks. **2. Analysis of Incorrect Options:** * **Option A (Single layer):** While Lembert sutures can be part of a single-layer closure, the term specifically defines the *depth* (sero-muscular) rather than the number of layers. * **Option C (All coat):** Sutures that involve all layers (including mucosa) are called **transmural** or "all-coat" sutures (e.g., the Connell suture). These are typically used for the inner layer of a two-layer anastomosis to ensure hemostasis. * **Option D (Skin suturing):** Lembert sutures are internal sutures; skin closure typically utilizes simple interrupted, mattress, or subcuticular techniques. **3. Clinical Pearls for NEET-PG:** * **Inverting vs. Everting:** Lembert and Connell sutures are **inverting**. Horizontal mattress sutures used in vascular surgery are **everting**. * **Two-Layer Anastomosis:** Traditionally, the inner layer is a continuous all-coat suture (e.g., Connell or Schmieden) for hemostasis, and the outer layer is an interrupted Lembert (sero-muscular) for structural integrity and serosal seal. * **Halsted’s Law:** The **submucosa** is the strongest layer of the bowel wall and must be caught in "all-coat" sutures for strength, but Lembert specifically targets the sero-muscular layer to achieve inversion.

Q: What is the most accurate diagnostic test for Zollinger-Ellison syndrome (ZES)?

Secretin stimulation test. **Explanation:** Zollinger-Ellison Syndrome (ZES) is caused by a gastrin-secreting tumor (gastrinoma), leading to severe peptic ulcer disease and diarrhea. **Why Secretin Stimulation Test is the Correct Answer:** While fasting serum gastrin is the initial screening test, the **Secretin stimulation test** is considered the **most accurate (most sensitive and specific) provocative test** for diagnosing ZES. * **Physiology:** In normal individuals, secretin inhibits gastrin release. However, in gastrinoma cells, secretin paradoxically stimulates the release of gastrin. * **Criteria:** A rise in serum gastrin levels of **>200 pg/mL** above the baseline following secretin injection is diagnostic of ZES. It is particularly useful when gastrin levels are suggestive (100–1000 pg/mL) but not definitive. **Why Other Options are Incorrect:** * **A. Fasting Serum Gastrin:** This is the **best initial screening test**. Levels >1000 pg/mL are highly suggestive, but it can be falsely elevated in patients taking Proton Pump Inhibitors (PPIs) or those with chronic atrophic gastritis. * **B. Computed Tomography (CT) Scan:** CT is used for **localization** of the tumor after a biochemical diagnosis is made, but it is not a diagnostic test for the syndrome itself. * **C. Endoscopy:** This identifies the complications (multiple or refractory ulcers) but cannot confirm the underlying hormonal etiology. **High-Yield Clinical Pearls for NEET-PG:** * **Most common location:** The **Gastrinoma Triangle** (Passaro’s Triangle)—bounded by the junction of the cystic and common bile duct, the junction of the 2nd and 3rd parts of the duodenum, and the neck of the pancreas. * **Association:** Approximately 25% of cases are associated with **Multiple Endocrine Neoplasia type 1 (MEN1)**. * **Most sensitive imaging:** Somatostatin Receptor Scintigraphy (SRS) or Endoscopic Ultrasound (EUS).

Q: A female patient presents with pigmentation of the lips and oral mucosa along with intestinal polyps. Her sister also has a similar history. What is the most probable diagnosis?

Peutz-Jeghers syndrome. **Explanation:** The clinical presentation of mucocutaneous pigmentation and intestinal polyposis, combined with a positive family history, is the classic triad for **Peutz-Jeghers Syndrome (PJS)**. **1. Why Peutz-Jeghers Syndrome is Correct:** PJS is an **Autosomal Dominant** condition characterized by a mutation in the **STK11 (LKB1)** gene on chromosome 19. * **Pigmentation:** Characteristic melanocytic macules appear on the lips, perioral area, and buccal mucosa. * **Polyps:** These are **hamartomatous** (not adenomatous) polyps, most commonly found in the **small intestine** (jejunum > ileum > duodenum). * **Complications:** Patients are at high risk for intussusception and various malignancies (GI, breast, and gynecological). **2. Why Other Options are Incorrect:** * **Carcinoid Tumor:** These are neuroendocrine tumors that present with "Carcinoid Syndrome" (flushing, diarrhea, wheezing) due to serotonin release, not mucocutaneous pigmentation. * **Melanoma:** While it involves melanocytes, it presents as asymmetrical, irregular skin lesions or mucosal masses, not as a systemic polyposis syndrome. * **Villous Adenoma:** This is a type of neoplastic colonic polyp known for causing secretory diarrhea and hypokalemia; it is not associated with oral pigmentation. **3. High-Yield Clinical Pearls for NEET-PG:** * **Most common site of polyps:** Small Intestine (Jejunum). * **Most common complication:** Intussusception (often leading to "lead point" obstruction). * **Histology:** Look for a **"Christmas tree"** branching pattern of smooth muscle (arborization) within the polyp. * **Cancer Risk:** Cumulative risk of any cancer is ~90% by age 70. Breast cancer is the most common extra-intestinal malignancy.

Question 1

What is the primary indication for fundoplication?

Accepted Answer

Gastroesophageal reflux disease (GERD)

Answer

Gastric volvulus

Answer

Diaphragmatic eventration

Answer

Bochdalek's hernia

Question 2

Linitis plastica is characteristic of which of the following?

Accepted Answer

Stomach cancer

Answer

Gall bladder cancer

Answer

Pancreatic cancer

Answer

Renal cell cancer

Question 3

Corkscrew esophagus in barium swallow is characteristic of which of the following conditions?

Accepted Answer

Diffuse esophageal spasm

Answer

Achalasia cardia

Answer

Esophageal cancer

Answer

Diverticulum

Question 4

In abdominal surgery, Lembert sutures refer to which type of suturing?

Accepted Answer

Sero-muscular sutures

Answer

Single layer suturing

Answer

All coat intestinal suturing

Answer

Skin suturing

Question 5

A 30-year-old lady presented with acute pain abdomen, constipation, and vomiting, suspecting acute intestinal obstruction. What is the investigation of choice for this patient?

Accepted Answer

X-ray abdomen erect posture

Answer

Barium enema

Answer

Ultrasound (USG)

Answer

CT scan

Question 6

What is the investigation of choice for esophageal rupture?

Accepted Answer

Water-soluble low-molecular-weight contrast swallow

Answer

Dynamic MRI

Answer

Rigid esophagoscopy

Answer

Barium contrast swallow

Question 7

What is the most accurate diagnostic test for Zollinger-Ellison syndrome (ZES)?

Accepted Answer

Secretin stimulation test

Answer

Fasting serum gastrin

Answer

Computed tomography (CT) scan

Answer

Endoscopy

Question 8

A female patient presents with pigmentation of the lips and oral mucosa along with intestinal polyps. Her sister also has a similar history. What is the most probable diagnosis?

Accepted Answer

Peutz-Jeghers syndrome

Answer

Carcinoid tumor

Answer

Melanoma

Answer

Villous adenoma

Question 9

Persistent vomiting causes which of the following electrolyte disturbances?

Accepted Answer

Hyponatremic hyperchloremia and paradoxical aciduria

Answer

Hypernatremia without decreased chloride and hypokalemic metabolic alkalosis

Answer

Hypokalemic metabolic alkalosis and paradoxical aciduria

Answer

Hyponatremic hyperchloremia and hypokalemic metabolic alkalosis

Question 10

What is the most common type of mesenteric cyst?

Accepted Answer

Cholangiocystic lymphangioma

Answer

Enterogenous cyst

Answer

Omental cyst

Answer

Urogenital cyst

Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery — MCQs

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