Gastrointestinal Surgery Practice Questions

Q: Which of the following statements about a diverticulum of the stomach is/are correct?

Usually located on the posterior surface.. Gastric diverticula are rare clinical entities, but they are high-yield for surgical exams due to their specific anatomical characteristics. ### **Explanation of the Correct Answer** **Option C (Usually located on the posterior surface)** is correct. Approximately 75% of gastric diverticula are **"true" diverticula** (containing all layers of the gastric wall). These are characteristically located on the **posterior wall of the fundus**, just below the gastroesophageal junction and near the lesser curvature. This specific location is thought to be a "point of weakness" where longitudinal muscle fibers diverge. ### **Analysis of Incorrect Options** * **Option A:** Most gastric diverticula are **asymptomatic** and discovered incidentally during endoscopy or barium studies. If symptoms occur, they are usually vague (dyspepsia or fullness) rather than acute pain. * **Option B:** While they are located near the cardia, the more precise anatomical description for NEET-PG purposes is the **posterior wall of the fundus**. * **Option D:** Asymptomatic diverticula require no treatment. For symptomatic cases, the preferred surgical treatment is **laparoscopic diverticulectomy (resection)**. Inversion is generally not recommended as it can lead to a pseudotumor appearance or lead to recurrence. ### **Clinical Pearls for NEET-PG** * **Type I (Congenital):** True diverticula, located in the fundus (most common). * **Type II (Acquired/Pseudodiverticula):** Usually located in the antrum; often associated with PUD, malignancy, or gastric outlet obstruction. * **Radiology:** On a Barium swallow, they appear as a "flask-shaped" outpouching with a narrow neck. * **Differential Diagnosis:** Must be distinguished from an adrenal mass or a splenic artery aneurysm on CT scans.

Q: Which of the following is NOT a cause of upper gastrointestinal bleeding?

Carcinoma of the stomach. **Explanation:** The classification of gastrointestinal (GI) bleeding is based on the anatomical location relative to the **Ligament of Treitz**. Upper GI bleeding (UGIB) originates proximal to this ligament (esophagus, stomach, or duodenum). **Why Option D is the "Correct" Answer (Contextual Analysis):** In the context of standard surgical MCQs, while **Carcinoma of the stomach** can certainly cause chronic occult bleeding or melena, it is rarely a cause of *acute, massive, or life-threatening* upper GI hemorrhage compared to the other options. However, it is important to note that clinically, gastric cancer *is* a cause of UGIB. In many competitive exams, this question is used to test the "most common" vs. "least common" causes; among the choices provided, Peptic Ulcer Disease (PUD), Gastritis, and Varices are the classic "Big Three" causes of acute UGIB. **Analysis of Incorrect Options:** * **A. Peptic Ulcer:** This is the **most common cause** of upper GI bleeding worldwide (approx. 50% of cases). Bleeding occurs when the ulcer erodes into a vessel, such as the gastroduodenal artery. * **B. Erosive Gastritis:** A frequent cause of UGIB, often associated with NSAID use, alcohol consumption, or severe physiological stress (Stress ulcers/Curling’s ulcers). * **C. Oesophageal Varices:** A major cause of massive UGIB in patients with portal hypertension (cirrhosis). It carries the highest mortality rate among the options. **NEET-PG High-Yield Pearls:** 1. **Most common cause of UGIB:** Duodenal Ulcer (specifically posterior wall ulcers eroding the gastroduodenal artery). 2. **Forrest Classification:** Used endoscopically to grade peptic ulcer bleeding and predict rebleeding risk. 3. **Rockall and Glasgow-Blatchford Scores:** Clinical tools used to risk-stratify patients with UGIB. 4. **Dieulafoy’s Lesion:** A rare but high-yield cause of UGIB involving a large submucosal artery that erodes through the gastric mucosa.

Q: Which of the following is NOT a true statement regarding Meckel's diverticulum?

It arises at the mesenteric border.. **Explanation:** Meckel’s diverticulum is the most common congenital anomaly of the gastrointestinal tract, resulting from the incomplete obliteration of the **vitellointestinal (omphalomesenteric) duct**. **Why Option C is the correct answer (The False Statement):** Meckel’s diverticulum is a **true diverticulum** (containing all layers of the bowel wall) that characteristically arises from the **antimesenteric border** of the ileum. This is a crucial anatomical distinction because its blood supply, the remnant of the vitelline artery, runs across the mesentery to reach the antimesenteric edge. **Analysis of Incorrect Options (True Statements):** * **Option A (Bleeding):** This is the most common presentation in children. It occurs due to acid secretion from **ectopic gastric mucosa**, which causes ulceration of the adjacent ileal mucosa. * **Option B (Intussusception):** The diverticulum can act as a **lead point**, causing the ileum to invaginate into itself, leading to intestinal obstruction. * **Option D (Location):** It is typically found within 2 feet (**approx. 60 cm**) of the ileocecal valve, though this distance can vary with age. **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 usually presents before age 2. * **Diagnosis:** The investigation of choice for a bleeding Meckel’s is a **Technetium-99m pertechnetate scan** (Meckel’s scan), which identifies ectopic gastric mucosa. * **Complications:** In adults, the most common complication is **intestinal obstruction**, whereas in children, it is **painless lower GI bleeding**.

Q: What is the most common site for impaction of a foreign body in the gastrointestinal tract?

Cricopharynx. ### Explanation The gastrointestinal tract has several anatomical points of narrowing where ingested foreign bodies (FBs) are likely to become impacted. **1. Why Cricopharynx is the Correct Answer:** The **cricopharynx** (upper esophageal sphincter) is the narrowest part of the entire esophagus and the most common site for foreign body impaction (approximately 70-75% of cases). It is located at the level of the C6 vertebra. Once a foreign body passes the cricopharynx, it is much more likely to pass through the rest of the GI tract spontaneously, provided there are no distal strictures. **2. Analysis of Incorrect Options:** * **Pyriform Fossa:** While a common site for sharp objects (like fish bones) to get lodged in the oropharynx, it is not the most common site for general GI impaction compared to the cricopharynx. * **Pyloric Sphincter:** This is the second most common site of impaction in children. However, most objects that pass the esophagus will successfully pass the pylorus. * **Ileocaecal Junction:** This is the narrowest part of the small intestine. While it is a common site for the impaction of objects that have already cleared the stomach (like gallstones in gallstone ileus), it is statistically less frequent than the cricopharynx. **3. Clinical Pearls for NEET-PG:** * **Three Esophageal Constrictions:** 1. Cricopharynx (15cm from incisors), 2. Aortic arch/Left main bronchus (25cm), 3. Diaphragmatic hiatus (40cm). * **Management:** Most FBs (80-90%) pass spontaneously. Endoscopic removal is required in 10-20%, and surgery in <1%. * **Emergency Intervention:** Required for **button batteries** in the esophagus (risk of liquefactive necrosis/perforation) or **multiple magnets** (risk of bowel wall necrosis between magnets). * **Radiology:** Coins in the esophagus appear "flat" (circular) on AP X-ray views, whereas coins in the trachea appear as a "stripe" (on edge).

Q: Splenectomy is indicated in which of the following conditions?

All of the above. **Explanation:** The correct answer is **D (All of the above)**. The underlying medical concept involves the role of the spleen in **extravascular hemolysis**. In various hereditary red cell membrane defects, the erythrocytes lose their normal deformability, becoming trapped and destroyed by splenic macrophages. 1. **Hereditary Spherocytosis (HS):** This is the most common indication for elective splenectomy in children. Due to defects in proteins like spectrin or ankyrin, RBCs become spherical. These rigid cells cannot pass through the narrow splenic cords, leading to chronic hemolysis. Splenectomy is curative for the anemia, although the spherocytes persist in the peripheral blood. 2. **Hereditary Pyropoikilosis:** A severe subtype of elliptocytosis characterized by extreme thermal sensitivity of RBCs and fragmentation. It presents with severe hemolytic anemia from infancy, often necessitating splenectomy to reduce the transfusion burden. 3. **Hereditary Elliptocytosis (HE):** While most cases are asymptomatic, a small percentage of patients (approx. 10%) suffer from significant hemolysis. In these symptomatic cases, splenectomy is highly effective in increasing RBC lifespan. **Clinical Pearls for NEET-PG:** * **Timing:** Splenectomy should ideally be delayed until **after age 5** to minimize the risk of Overwhelming Post-Splenectomy Infection (OPSI). * **Prophylaxis:** Patients must receive vaccinations against encapsulated organisms (*S. pneumoniae, H. influenzae, N. meningitidis*) at least **2 weeks prior** to elective surgery. * **Post-Op Findings:** Look for **Howell-Jolly bodies**, Pappenheimer bodies, and Heinz bodies on the peripheral smear post-splenectomy. * **Gallstones:** Pigment (bilirubin) gallstones are a common complication of these hemolytic anemias; cholecystectomy is often performed concurrently with splenectomy.

Q: What is true regarding the resection and anastomosis of necrotic bowel?

A single-layer, extramucosal suture technique is preferred.. In intestinal surgery, the primary goal of anastomosis is to create a tension-free, leak-proof seal with adequate blood supply. **Explanation of the Correct Answer:** **Option C** is correct because the **single-layer, extramucosal (seromuscular) interrupted technique** is currently the gold standard. This technique involves taking a bite through the serosa, muscularis, and the **submucosa**, but specifically excluding the mucosa. This approach preserves the blood supply to the edges, causes less tissue strangulation, and results in less luminal narrowing compared to traditional double-layer techniques. **Analysis of Incorrect Options:** * **Option A:** Chromic catgut is a natural absorbable suture that loses strength rapidly and causes significant tissue reaction. Modern practice dictates the use of synthetic sutures (like PDS or Vicryl) for better tensile strength and minimal inflammation. * **Option B:** The **submucosa** is the strongest layer of the bowel wall (containing the most collagen). Any suture that does not include the submucosa lacks structural integrity and is prone to dehiscence. * **Option D:** While "seromuscular" is part of the technique, the term "extramucosal" is more precise in surgical literature as it emphasizes the inclusion of the submucosa while avoiding the contaminated mucosal lumen. **High-Yield Clinical Pearls for NEET-PG:** * **Strongest layer of the bowel:** Submucosa (essential for suture holding). * **Most common site of leak:** Extraperitoneal rectum (due to lack of serosa). * **Suture of choice:** Monofilament delayed-absorbable (e.g., PDS) is often preferred for single-layer closure. * **Hand-sewn vs. Stapled:** Studies show no significant difference in leak rates, but stapling is faster.

Q: Ochsner-Sherren regimen is used in the management of which condition?

Appendicular mass. **Explanation:** The **Ochsner-Sherren regimen** is the classic conservative management strategy for an **Appendicular Mass**. **1. Why Appendicular Mass is Correct:** An appendicular mass forms when the omentum and small bowel loops wrap around an inflamed appendix to localize the infection (phlegmon). Performing surgery in this inflammatory stage is technically difficult and risky, often leading to bowel injury or the need for a right hemicolectomy. The Ochsner-Sherren regimen aims to allow the inflammation to subside. It involves: * Strict NPO (Nothing by mouth) and IV fluids. * Broad-spectrum antibiotics. * Careful monitoring of vitals and mass size. If successful, an **interval appendicectomy** is typically performed 6–8 weeks later. **2. Why Other Options are Incorrect:** * **Appendicular Abscess:** This is a collection of pus. While it may follow a mass, the primary treatment is **percutaneous drainage** under USG/CT guidance, not just conservative observation. * **Chronic Appendicitis:** This is a clinical diagnosis of recurrent pain; the treatment is elective appendicectomy. * **Acute Appendicitis:** The standard of care for uncomplicated acute appendicitis is **early emergency appendicectomy** to prevent perforation. **3. Clinical Pearls for NEET-PG:** * **Criteria for stopping the regimen:** Increasing pain, rising pulse rate, increasing size of the mass, or signs of generalized peritonitis. These indicate failure of conservative management and require immediate surgical intervention. * **Interval Appendicectomy:** Though traditional, recent evidence suggests it may be skipped if the patient remains asymptomatic, but for exams, it remains the standard follow-up. * **Most common cause of failure:** Development of an appendicular abscess.

Question 1

Which of the following statements about a diverticulum of the stomach is/are correct?

Accepted Answer

Usually located on the posterior surface.

Answer

Pain is the main symptom.

Answer

Usually located at the cardiac end.

Answer

Inversion is the satisfactory treatment.

Question 2

Which of the following is NOT a cause of upper gastrointestinal bleeding?

Accepted Answer

Carcinoma of the stomach

Answer

Peptic ulcer

Answer

Erosive gastritis

Answer

Oesophageal varices

Question 3

Which of the following is NOT a true statement regarding Meckel's diverticulum?

Accepted Answer

It arises at the mesenteric border.

Answer

Bleeding can occur.

Answer

Intussusception is a possible complication.

Answer

It is typically located within 60 cm of the ileocecal valve.

Question 4

A 60-year-old male alcoholic presents with acute upper GI bleeding following bouts of vigorous vomiting. What is the most probable diagnosis?

Accepted Answer

Mucosal and submucosal tear at the cardiac orifice of the stomach

Answer

Acute gastritis

Answer

Boerhaave's syndrome

Answer

Esophageal carcinoma

Question 5

What is the most common site for impaction of a foreign body in the gastrointestinal tract?

Accepted Answer

Cricopharynx

Answer

Ileocaecal junction

Answer

Pyriform fossa

Answer

Pyloric sphincter

Question 6

Splenectomy is indicated in which of the following conditions?

Accepted Answer

All of the above

Answer

Spherocytosis

Answer

Pyropoikilosis

Answer

Elliptocytosis

Question 7

What is true regarding the resection and anastomosis of necrotic bowel?

Accepted Answer

A single-layer, extramucosal suture technique is preferred.

Answer

Chromic catgut is used for anastomosis.

Answer

The submucosa should not be included in the sutures.

Answer

A single-layer seromuscular suture technique is preferred.

Question 8

Ochsner-Sherren regimen is used in the management of which condition?

Accepted Answer

Appendicular mass

Answer

Appendicular abscess

Answer

Chronic appendicitis

Answer

Acute appendicitis

Question 9

What is the best treatment for an 80-year-old woman presenting with vomiting, retrosternal pain, and a nasogastric tube positioned in her left chest?

Accepted Answer

Consider surgical reduction of volvulus and diaphragmatic repair.

Answer

Remove the tube as the patient is now well and discharged.

Answer

Evaluate the esophageal myotomy to treat achalasia.

Answer

Immediate left thoracotomy to treat perforation.

Question 10

Elective splenectomy is indicated in which of the following conditions?

Accepted Answer

Hereditary spherocytosis

Answer

G6PD deficiency

Answer

Beta thalassemia

Answer

Sickle cell anemia

Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery — MCQs

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