Gastrointestinal Surgery Practice Questions

Q: What is the most common cause of splenic rupture?

Malaria. **Explanation:** **Splenic rupture** can occur due to trauma or spontaneously in a diseased spleen. In the context of medical causes (non-traumatic/pathological rupture), **Malaria** is the most common cause worldwide, particularly in endemic regions. **Why Malaria is the correct answer:** In Malaria (especially *P. vivax* and *P. falciparum*), the spleen undergoes rapid congestion, hyperplasia, and infarcts. This leads to significant **splenomegaly**, stretching the splenic capsule. The capsule becomes thin and friable, making it highly susceptible to rupture even with trivial trauma or during the acute phase of the infection (spontaneous rupture). **Analysis of Incorrect Options:** * **ITP:** While ITP involves splenic destruction of platelets, the spleen is typically **not enlarged** (non-palpable). A palpable spleen in a suspected ITP case should prompt a search for an alternative diagnosis. * **Thalassemia:** This causes massive splenomegaly due to extramedullary hematopoiesis. While the spleen is large, the chronic nature of the enlargement leads to a thickened, fibrotic capsule which is more resistant to rupture compared to the acute enlargement seen in Malaria. * **Cirrhosis:** Leads to congestive splenomegaly due to portal hypertension. While common, the risk of spontaneous rupture is significantly lower than in acute infectious processes like Malaria or Infectious Mononucleosis. **High-Yield Clinical Pearls for NEET-PG:** 1. **Most common organ injured in blunt trauma abdomen:** Spleen. 2. **Most common cause of spontaneous (pathological) splenic rupture:** Malaria (followed by Infectious Mononucleosis). 3. **Kehr’s Sign:** Referred pain to the left shoulder due to diaphragmatic irritation by splenic blood (classic sign of rupture). 4. **Ballance’s Sign:** Fixed dullness in the left flank and shifting dullness in the right flank, indicating a large perisplenic hematoma.

Q: A 37-year-old woman presents with high fever (39.5°C), nausea, and vomiting. Physical examination reveals increased abdominal pain in the paraumbilical region, rebound tenderness over McBurney's point, and a positive psoas sign. Blood tests show marked leukocytosis. What is the most likely diagnosis?

Appendicitis. ### Explanation **Correct Answer: B. Appendicitis** The clinical presentation is a classic textbook case of **Acute Appendicitis**. The diagnosis is primarily clinical, based on the following findings: * **Paraumbilical pain:** This represents visceral pain from the T10 dermatome as the appendix distends. * **McBurney’s Point Tenderness:** As the parietal peritoneum becomes inflamed, the pain localizes to the Right Iliac Fossa (RIF). * **Psoas Sign:** Pain on extension of the right hip indicates an inflamed appendix in a **retrocecal** position, irritating the iliopsoas muscle. * **Systemic Signs:** High fever, nausea, vomiting, and marked leukocytosis (left shift) are indicative of an acute inflammatory/infectious process. **Why Incorrect Options are Wrong:** * **A. Ectopic Pregnancy:** While it causes RIF pain, it is usually associated with amenorrhea, vaginal bleeding, and hemodynamic instability if ruptured. Fever and high leukocytosis are less common unless there is secondary infection. * **C. Cholecystitis:** Pain is typically localized in the **Right Upper Quadrant (RUQ)** and radiates to the right scapula (Boas' sign). Murphy’s sign would be positive, not McBurney’s. * **D. Nephrolithiasis:** Presents as "loin to groin" colicky pain. While it causes nausea, it rarely presents with high fever or rebound tenderness unless complicated by pyelonephritis. **High-Yield Clinical Pearls for NEET-PG:** * **Alvarado Score (MANTRELS):** A score ≥7 is highly suggestive of appendicitis. * **Most common position:** Retrocecal (75%), followed by Pelvic (20%). * **Rovsing’s Sign:** Pain in the RIF when the Left Iliac Fossa is palpated. * **Investigation of Choice:** Contrast-Enhanced CT (CECT) is the gold standard in adults; Ultrasound is preferred in children and pregnant women.

Q: What is true about a femoral hernia?

Pregnancy is a common cause. **Explanation:** **Why Option B is Correct:** Femoral hernias occur through the femoral canal, which is bounded medially by the lacunar ligament and laterally by the femoral vein. While femoral hernias are more common in females overall (due to a wider pelvis), the most significant physiological factor contributing to their development is **increased intra-abdominal pressure**. Pregnancy is a classic cause as it leads to both increased pressure and hormonal changes that relax pelvic ligaments, widening the femoral ring and predisposed the patient to herniation. **Analysis of Incorrect Options:** * **Option A:** While femoral hernias are more common in women (Female:Male ratio is approx. 4:1), they do **not** occur exclusively in females. In fact, the most common hernia in both sexes remains the indirect inguinal hernia. * **Option C:** Femoral hernias have the **highest risk of strangulation** (approx. 20-40%) among all abdominal wall hernias. This is because the femoral ring is narrow and rigid, particularly due to the sharp edge of the lacunar ligament. * **Option D:** There is no clinical association between femoral hernias and cryptorchidism (undescended testes). Cryptorchidism is more relevant to the development of indirect inguinal hernias due to a patent processus vaginalis. **NEET-PG High-Yield Pearls:** * **Position:** A femoral hernia is felt **below and lateral** to the pubic tubercle (Inguinal hernias are above and medial). * **Laugier’s Hernia:** A rare variant of femoral hernia through the lacunar ligament. * **Cloquet’s Node:** A lymph node located within the femoral canal that can mimic a strangulated femoral hernia (De Garengeot's hernia is when the appendix is in the sac). * **Management:** Because of the high risk of strangulation, all femoral hernias should be repaired surgically (e.g., McVay repair or pre-peritoneal mesh).

Q: Which of the following is FALSE about short bowel syndrome?

Hirsutism is a typical feature.. **Explanation:** Short Bowel Syndrome (SBS) occurs when there is insufficient functional small bowel surface area (usually <200 cm) to maintain nutritional and fluid homeostasis. **Why Option C is the correct (False) statement:** **Hirsutism** is not a feature of SBS. In fact, due to severe protein-energy malnutrition and malabsorption of essential fatty acids and vitamins, patients are more likely to experience **alopecia** (hair loss), brittle nails, and skin rashes (e.g., acrodermatitis enteropathica due to Zinc deficiency). **Analysis of other options:** * **Option A (True):** Loss of the small intestine leads to a decrease in inhibitory hormones (like enterogastrone). This results in **reactive hypergastrinemia**, causing gastric acid hypersecretion, which can exacerbate diarrhea and cause peptic ulceration. * **Option B (True):** The hallmark of SBS is the triad of **diarrhea, dehydration, and malnutrition** due to the loss of absorptive surface area and rapid intestinal transit. * **Option D (True):** If the remaining bowel fails to undergo "intestinal adaptation" or if the length is critically short (e.g., <50-60 cm), patients become **permanently dependent on Total Parenteral Nutrition (TPN)** for survival. **NEET-PG High-Yield Pearls:** * **Most common cause:** In adults, it is Crohn's disease or mesenteric ischemia; in neonates, it is Necrotizing Enterocolitis (NEC). * **Critical Length:** Intestinal failure is likely if the remaining small bowel is <100 cm without a colon, or <60 cm with an intact colon. * **Metabolic Complications:** Patients are prone to **oxalate renal stones** (due to increased colonic absorption of oxalate) and **cholesterol gallstones** (due to depleted bile acid pool). * **Management:** Loperamide for motility, PPIs for hypersecretion, and **Teduglutide** (GLP-2 analogue) to enhance intestinal adaptation.

Q: A 60-year-old female presents with a tender, irreducible mass immediately below and lateral to the pubic tubercle. Plain abdominal X-ray shows intestinal obstruction. What is the most likely diagnosis?

Strangulated femoral hernia. ### Explanation **1. Why the Correct Answer is Right:** The diagnosis is based on the anatomical location of the mass. A **femoral hernia** typically presents as a lump **below and lateral to the pubic tubercle**, passing through the femoral canal. This is in contrast to an inguinal hernia, which is found above and medial to the pubic tubercle. Femoral hernias have a very high risk of **strangulation** (up to 40%) because the femoral ring is narrow and rigid (bounded by the lacunar ligament). The patient’s presentation—a tender, irreducible mass combined with clinical signs of intestinal obstruction (vomiting, distension, and X-ray findings)—is a classic "textbook" description of a strangulated femoral hernia. **2. Why the Incorrect Options are Wrong:** * **Small bowel carcinoma:** While it can cause obstruction, it would not present as a tender, palpable mass in the groin. * **Adhesions:** This is the most common cause of small bowel obstruction overall, but it does not explain the presence of a localized, irreducible groin mass. * **Strangulated inguinal hernia:** An inguinal hernia emerges **above and medial** to the pubic tubercle. While it is a common cause of obstruction, the specific anatomical description provided points definitively to the femoral canal. **3. NEET-PG High-Yield Pearls:** * **Demographics:** Femoral hernias are more common in **females** (due to a wider pelvis), though inguinal hernias remain the most common hernia type in both sexes. * **Anatomy:** The femoral canal is bounded medially by the **Lacunar (Gimbernat’s) ligament**, which is often the site of constriction in strangulation. * **Management:** Because of the high risk of strangulation, all femoral hernias should be repaired surgically upon diagnosis. * **Differential:** A "Cloquet’s node" (enlarged lymph node in the femoral canal) can mimic a femoral hernia but usually does not cause bowel obstruction.

Q: Which is the most common site for a duodenal ulcer?

Within 2 centimeters of the pylorus. **Explanation:** **Why Option A is Correct:** Duodenal ulcers (DU) are primarily caused by an imbalance between aggressive factors (gastric acid and pepsin) and mucosal defense mechanisms. The **first part of the duodenum (D1)** is the most common site because it is the first area to receive the highly acidic chyme as it empties from the stomach through the pylorus. Specifically, over **95% of duodenal ulcers occur in the duodenal bulb**, within **2 cm of the pylorus**. The anterior wall is more frequently involved than the posterior wall. **Why Other Options are Incorrect:** * **Option B (Second part):** Ulcers in the second part of the duodenum are rare. If present, they should raise clinical suspicion for **Zollinger-Ellison Syndrome (Gastrinoma)**. * **Option C & D (Distal duodenum/Jejunum):** These are "ectopic" sites for peptic ulcers. Ulcers located beyond the first part of the duodenum are highly suggestive of pathological hypergastrinemia or malignancy and are not typical for standard peptic ulcer disease. **NEET-PG High-Yield Pearls:** * **H. pylori:** The most common cause of DU (associated with ~90% of cases). * **Anterior vs. Posterior:** Anterior wall ulcers are more likely to **perforate**, whereas posterior wall ulcers are more likely to **bleed** (due to erosion of the **gastroduodenal artery**). * **Blood Group:** There is a known association between **Blood Group O** and duodenal ulcers. * **Acid Secretion:** Unlike gastric ulcers (which may have normal/low acid), duodenal ulcers are almost always associated with **maximal acid output**.

Q: What is the most important step in the repair of an indirect inguinal hernia?

Narrowing of the internal ring. **Explanation:** The fundamental pathology of an **indirect inguinal hernia** is a persistent processus vaginalis and a dilated **internal (deep) inguinal ring**. While several steps are involved in the surgical management, the most critical step to prevent recurrence and restore anatomy is the **narrowing of the internal ring** (Option B). This reinforces the "shutter mechanism" of the transversus abdominis muscle, which is the primary physiological defense against herniation at this site. **Analysis of Options:** * **A & D. Herniotomy and Transfixation of the neck:** These are the standard treatments for indirect hernias in **children** (where the pathology is purely a patent processus vaginalis). In adults, however, simply removing the sac without addressing the dilated internal ring leads to high recurrence rates. * **C. Bassini’s Repair:** This is a specific technique of tissue-based repair that involves suturing the conjoint tendon to the inguinal ligament. While it was once the gold standard, it is a method of posterior wall reinforcement rather than the "most important step" for the indirect component itself. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Treatment:** Currently, the **Lichtenstein tension-free mesh repair** is the procedure of choice for adult inguinal hernias. * **The "Shutter Mechanism":** Contraction of the internal oblique and transversus abdominis muscles lowers them toward the inguinal ligament, shielding the internal ring. * **Anatomy:** An indirect hernia sac lies **lateral** to the inferior epigastric vessels, whereas a direct hernia lies **medial** (Hesselbach’s triangle). * **Most common hernia:** Indirect inguinal hernia is the most common type in both males and females.

Q: Which condition is diagnosed by the following sign?

Carcinoma of the stomach. ***Carcinoma of the stomach*** - The **leather bottle stomach** (linitis plastica) sign on **barium meal** is pathognomonic for diffuse gastric adenocarcinoma, showing a rigid, non-distensible stomach. - This appearance results from **signet ring cells** infiltrating the gastric wall, causing **fibrosis** and loss of normal gastric rugae and distensibility. *Peptic ulcer disease* - Barium meal typically shows **crater-like ulcers** with surrounding **mucosal edema** and inflammation, not the rigid leather bottle appearance. - The stomach maintains its **normal distensibility** and **peristaltic activity**, unlike the fixed appearance in linitis plastica. *Strawberry gallbladder* - This is a **cholesterolosis** condition affecting the **gallbladder wall** with characteristic **yellow cholesterol deposits** creating a strawberry-like appearance. - It is diagnosed by **ultrasound** or **cholecystography**, not by barium meal, and does not involve the stomach. *Patent vitellointestinal duct* - This congenital anomaly presents as a **Meckel's diverticulum** or **umbilical discharge** in infants, diagnosed by **technetium-99m scan**. - It involves the **small intestine** and umbilicus, with no characteristic barium meal findings in the stomach.

Question 1

What is the most common cause of splenic rupture?

Accepted Answer

Malaria

Answer

Idiopathic Thrombocytopenic Purpura (ITP)

Answer

Thalassemia

Answer

Cirrhosis

Question 2

A 32-year-old patient presents with diarrhea and flushing. CT scan reveals multiple lesions in the liver. The primary disease is most likely located in which of the following?

Accepted Answer

Small bowel

Answer

Esophagus

Answer

Appendix

Answer

Stomach

Question 3

A 37-year-old woman presents with high fever (39.5°C), nausea, and vomiting. Physical examination reveals increased abdominal pain in the paraumbilical region, rebound tenderness over McBurney's point, and a positive psoas sign. Blood tests show marked leukocytosis. What is the most likely diagnosis?

Accepted Answer

Appendicitis

Answer

Ectopic pregnancy

Answer

Cholecystitis

Answer

Nephrolithiasis

Question 4

What is true about a femoral hernia?

Accepted Answer

Pregnancy is a common cause

Answer

Occurs exclusively in females

Answer

Does not strangulate

Answer

In males, it is associated with cryptorchidism

Question 5

Which of the following is FALSE about short bowel syndrome?

Accepted Answer

Hirsutism is a typical feature.

Answer

Hypergastrinemia and high gastric secretion are seen.

Answer

Diarrhea, dehydration, and malnutrition are common.

Answer

Chronic TPN dependence may occur.

Question 6

A 60-year-old female presents with a tender, irreducible mass immediately below and lateral to the pubic tubercle. Plain abdominal X-ray shows intestinal obstruction. What is the most likely diagnosis?

Accepted Answer

Strangulated femoral hernia

Answer

Small bowel carcinoma

Answer

Adhesions

Answer

Strangulated inguinal hernia

Question 7

Which is the most common site for a duodenal ulcer?

Accepted Answer

Within 2 centimeters of the pylorus

Answer

Second part of the duodenum

Answer

Distal duodenum

Answer

Early part of the jejunum

Question 8

What is the most important step in the repair of an indirect inguinal hernia?

Accepted Answer

Narrowing of the internal ring

Answer

Herniotomy

Answer

Bassini's repair

Answer

Transfixation of the neck of the sac

Question 9

A 63-year-old man undergoes a partial gastrectomy with Billroth II reconstruction for intractable peptic ulcer disease. He presents several months postoperatively with a megaloblastic anemia. Which of the following is the best treatment for this surgical complication?

Accepted Answer

Intravenous vitamin B12 supplementation

Answer

Transfusion with 1 unit of packed red blood cells

Answer

Oral iron supplementation

Answer

Oral vitamin B12 supplementation

Question 10

Which condition is diagnosed by the following sign?

Accepted Answer

Carcinoma of the stomach

Answer

Peptic ulcer disease

Answer

Strawberry gallbladder

Answer

Patent vitellointestinal duct

Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery — MCQs

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