Gastrointestinal Surgery — MCQs
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Which of the following is NOT a characteristic of malignant gastric ulcers?
A patient presents with a history of abdominal pain. On examination, the person is in shock, with severe abdominal tenderness and guarding. There was also one episode of bloody diarrhea. He gives a history of recurrent abdominal pain soon after taking food which persists for about 3 hours after food. He also has a history of myocardial infarction about 5 years back. What is your diagnosis?
What is true about choledochal cysts?
An appendicular fistula is least likely to heal if?
What is the treatment of choice for fistula in ano?
Duodenal blow out following Billroth gastrectomy most commonly occurs on which day?
A young patient presents with a history of dysphagia, more to liquids than solids. What is the first investigation you will perform?
Which of the following is NOT true about achalasia?
What is the most common site of Curling's ulcer?
All of the following are true about Retained Antrum Syndrome except:
Gastrointestinal Surgery Indian Medical PG Practice Questions and MCQs
Question 891: Which of the following is NOT a characteristic of malignant gastric ulcers?
- A. Ulcer extends beyond the gastric wall. (Correct Answer)
- B. Mucosal rugae stop far from the ulcer.
- C. Eccentric crater.
- D. Margins are raised.
Explanation: In gastric surgery and radiology, distinguishing between benign and malignant ulcers is a high-yield topic for NEET-PG. ### **Explanation of the Correct Answer** **Option A (Ulcer extends beyond the gastric wall)** is the correct answer because it is a characteristic of **benign ulcers**, not malignant ones. In a benign ulcer, the crater typically projects beyond the projected margin of the gastric wall (seen as a "niche" on barium swallow) because the ulcer is a result of tissue excavation. Conversely, a **malignant ulcer** is usually an excavation within a tumor mass; therefore, the ulcer crater remains **within the confines of the gastric wall.** ### **Analysis of Incorrect Options** * **Option B (Mucosal rugae stop far from the ulcer):** In malignancy, the infiltrating tumor destroys the normal mucosal architecture. Consequently, the rugal folds appear thickened, irregular, and stop abruptly before reaching the ulcer margin. In benign ulcers, rugae are smooth and radiate directly to the edge of the crater. * **Option C (Eccentric crater):** Malignant ulcers are often located eccentrically within a neoplastic mass, whereas benign ulcers are typically centrally located within a smooth mound of edema. * **Option D (Margins are raised):** Malignant ulcers often present as "Carman’s meniscus sign," where the margins are heaped-up, nodular, or everted due to the surrounding tumor growth. ### **Clinical Pearls for NEET-PG** * **Location:** Benign ulcers are most common on the **lesser curvature**; malignant ulcers can occur anywhere but are suspicious when on the **greater curvature**. * **Size:** Ulcers >3 cm have a higher probability of being malignant. * **Gold Standard:** All gastric ulcers must be biopsied (at least 6–8 samples from the edge) to rule out malignancy, unlike duodenal ulcers which are almost never malignant. * **Carman’s Meniscus Sign:** Pathognomonic for a large, ulcerating mucosal gastric carcinoma.
Question 892: A patient presents with a history of abdominal pain. On examination, the person is in shock, with severe abdominal tenderness and guarding. There was also one episode of bloody diarrhea. He gives a history of recurrent abdominal pain soon after taking food which persists for about 3 hours after food. He also has a history of myocardial infarction about 5 years back. What is your diagnosis?
- A. Acute thrombotic mesenteric vascular occlusion (Correct Answer)
- B. Acute pancreatitis
- C. Acute duodenal ulcer perforation
- D. Acute appendicitis
Explanation: **Explanation:** The clinical presentation points toward **Acute Mesenteric Ischemia (AMI)**, specifically **Acute Thrombotic Mesenteric Vascular Occlusion**. 1. **Why it is correct:** The patient has a classic history of **"Intestinal Angina"** (recurrent post-prandial abdominal pain lasting 1–3 hours), which indicates pre-existing atherosclerotic narrowing of the mesenteric vessels. The sudden progression to shock, severe tenderness (indicating bowel infarction/peritonitis), and **bloody diarrhea** (sloughing of ischemic mucosa) are hallmarks of acute occlusion. His history of myocardial infarction confirms a systemic atherosclerotic profile, a major risk factor for mesenteric thrombosis. 2. **Why the others are incorrect:** * **Acute Pancreatitis:** While it causes severe pain and shock, it does not typically present with bloody diarrhea or a specific history of post-prandial "angina" pain. * **Acute Duodenal Ulcer Perforation:** This presents with sudden "board-like" rigidity. While pain may be related to food, it usually improves with food (in DU) and does not cause bloody diarrhea. * **Acute Appendicitis:** This typically presents with migratory pain to the right iliac fossa and fever, not systemic shock and bloody diarrhea in the early stages. **Clinical Pearls for NEET-PG:** * **Classic Triad of AMI:** Severe abdominal pain out of proportion to physical findings (early), gut emptying (vomiting/diarrhea), and a source of emboli (AFib) or thrombus (Atherosclerosis). * **Gold Standard Investigation:** CT Angiography. * **Early Sign on X-ray:** Usually normal; late signs include "Thumbprinting" (mucosal edema) or Pneumatosis intestinalis. * **Most common site:** Superior Mesenteric Artery (SMA).
Question 893: What is true about choledochal cysts?
- A. Always extrahepatic
- B. Treatment is cystojejunostomy
- C. Excision is the ideal treatment (Correct Answer)
- D. Drainage is the treatment of choice
Explanation: **Explanation:** Choledochal cysts are congenital cystic dilatations of the biliary tree. The management of these cysts has evolved significantly, focusing on the prevention of long-term complications. **1. Why "Excision is the ideal treatment" is correct:** The gold standard treatment for choledochal cysts (specifically Type I and IV) is **complete surgical excision of the cyst** followed by biliary reconstruction, typically via a **Roux-en-Y Hepaticojejunostomy**. The primary medical rationale is the high risk of **cholangiocarcinoma** (malignant transformation) arising from the cyst wall due to chronic inflammation and reflux of pancreatic enzymes. Simple drainage does not remove this premalignant tissue. **2. Why the other options are incorrect:** * **Option A:** Choledochal cysts are **not always extrahepatic**. According to the **Todani Classification**, Type IVa involves both intrahepatic and extrahepatic ducts, and Type V (Caroli’s disease) is limited to the intrahepatic ducts. * **Option B & D:** Internal drainage procedures like **Cystojejunostomy** or simple drainage are now considered obsolete and **incorrect**. These procedures leave the cyst wall intact, leading to recurrent cholangitis, stone formation, and a significantly high risk of future malignancy in the cyst remnant. **High-Yield Clinical Pearls for NEET-PG:** * **Todani Classification:** Most common type is **Type I** (Saccular or fusiform dilatation of the CBD). * **Classic Triad:** Jaundice, right upper quadrant pain, and a palpable mass (seen in only 20% of cases, mostly children). * **Etiology:** Often associated with an **Anomalous Pancreaticobiliary Duct Junction (APBDJ)**, allowing pancreatic juice to reflux into the CBD. * **Investigation of Choice:** **MRCP** is the gold standard for diagnosis and anatomical mapping.
Question 894: An appendicular fistula is least likely to heal if?
- A. The stump was sutured with vicryl
- B. There is stenosis or narrowing of the sigmoid colon (Correct Answer)
- C. There is superadded infection
- D. None of the above
Explanation: The persistence of a fistula is governed by specific physiological and mechanical factors. In the case of an appendicular fistula, the correct answer is **Option B (Stenosis or narrowing of the sigmoid colon)**. ### Why Option B is Correct The most critical factor preventing a fistula from healing is **distal obstruction**. According to Laplace’s Law and basic fluid dynamics, if there is a narrowing or stenosis distal to the fistula site (in this case, the sigmoid colon), the intraluminal pressure increases. This pressure gradient forces intestinal contents through the path of least resistance—the fistula tract—preventing it from closing and epithelializing. This is a classic surgical principle often remembered by the mnemonic **FRIEND** (Factors preventing fistula closure: **F**oreign body, **R**adiation, **I**nfection/IBD, **E**pithelialization, **N**eoplasm, **D**istal obstruction). ### Why Other Options are Incorrect * **Option A (Vicryl suture):** Vicryl (Polyglactin 910) is an absorbable suture. While non-absorbable sutures can sometimes act as a foreign body nidus, a standard absorbable suture used for the stump does not inherently prevent a fistula from healing. * **Option C (Superadded infection):** While infection can delay healing or contribute to the formation of a fistula, it is generally manageable with drainage and antibiotics. Distal obstruction is a much more definitive mechanical barrier to spontaneous closure than simple infection. ### NEET-PG High-Yield Pearls * **Most common cause of appendicular fistula:** Usually occurs as a complication of an appendiceal abscess or Crohn’s disease. * **Factors preventing fistula closure (FRIEND):** * **F**oreign body * **R**adiation (causes endarteritis) * **I**nflammation/IBD (especially Crohn’s) * **E**pithelialization of the tract * **N**eoplasm * **D**istal Obstruction (**Most Important**) * **Management:** The first step in managing any enterocutaneous fistula is stabilization (fluid/electrolytes) and nutritional support, but surgical correction is mandatory if distal obstruction is present.
Question 895: What is the treatment of choice for fistula in ano?
- A. Anal dilatation
- B. Fissurotomy
- C. Fistulectomy
- D. Fistulotomy (Correct Answer)
Explanation: **Explanation:** The primary goal in treating a fistula-in-ano is to eradicate the track while preserving anal sphincter function. **1. Why Fistulotomy is the Correct Answer:** **Fistulotomy** is considered the gold standard and treatment of choice for most simple (low) fistulae. It involves laying the fistula track open by cutting the overlying skin and muscle, allowing the wound to heal by secondary intention from the base upwards. It has a high success rate and a lower risk of fecal incontinence compared to more radical procedures. **2. Analysis of Incorrect Options:** * **Anal Dilatation (Lord’s Procedure):** This is historically used for hemorrhoids or anal fissures to reduce sphincter hypertonia; it has no role in treating a fistulous track. * **Fissurotomy:** This is the surgical treatment for a chronic anal fissure, not a fistula. * **Fistulectomy:** This involves the complete excision of the fistula track. While effective, it creates a larger wound, takes longer to heal, and carries a significantly higher risk of damaging the anal sphincters, leading to incontinence. Therefore, it is generally less preferred than fistulotomy. **3. Clinical Pearls for NEET-PG:** * **Goodsall’s Law:** Predicts the track of the fistula. If the external opening is **anterior** to a transverse line through the anus, the track is straight. If **posterior**, the track is curved and opens in the midline (Exception: Anterior openings >3cm from the anus also follow a curved posterior track). * **Park’s Classification:** Categorizes fistulae into Intersphincteric (most common), Transsphincteric, Suprasphincteric, and Extrasphincteric. * **Seton Placement:** Used for "complex" or "high" fistulae where a fistulotomy would risk major incontinence. * **Most common cause:** Cryptoglandular infection (infection of the anal glands).
Question 896: Duodenal blow out following Billroth gastrectomy most commonly occurs on which day?
- A. 2nd day
- B. 4th day (Correct Answer)
- C. 6th day
- D. 12th day
Explanation: **Explanation:** **Duodenal Blowout** is a serious complication following a Billroth II gastrectomy or Polya gastrectomy, characterized by the disruption of the duodenal stump closure. 1. **Why the 4th day is correct:** The duodenal stump is most vulnerable between the **4th and 6th postoperative days**. During this period, the initial surgical sutures lose their tensile strength due to the natural inflammatory phase of wound healing, while the deposition of new collagen (proliferative phase) has not yet provided sufficient structural integrity. Additionally, increased intraluminal pressure from afferent loop obstruction or local accumulation of bile and pancreatic juices can lead to dehiscence. Statistically, the 4th day is the peak time for this clinical presentation. 2. **Analysis of incorrect options:** * **2nd day:** This is too early for tissue necrosis or suture failure; any leak at this stage is usually due to a major technical error rather than biological healing failure. * **6th day:** While leaks can occur on the 6th day, the 4th day is the classic "textbook" peak for the onset of symptoms. * **12th day:** By this time, the proliferative phase of healing is well underway, and the stump is generally secure unless there is a significant distal obstruction or severe malnutrition. **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Presentation:** Sudden onset of severe upper abdominal pain, tachycardia, and signs of peritonitis (guarding/rigidity) in a patient recovering from gastrectomy. * **Management:** This is a surgical emergency. The treatment of choice is immediate re-exploration, peritoneal lavage, and **tube duodenostomy** (converting the blowout into a controlled lateral fistula). * **Prevention:** Ensuring a tension-free closure and avoiding afferent loop syndrome are key preventive measures.
Question 897: A young patient presents with a history of dysphagia, more to liquids than solids. What is the first investigation you will perform?
- A. Barium Swallow (Correct Answer)
- B. Esophagoscopy
- C. Ultrasound of the chest
- D. CT Scan of the chest
Explanation: **Explanation:** The clinical presentation of **dysphagia more to liquids than solids** is a classic hallmark of a **motility disorder**, most commonly **Achalasia Cardia**. In contrast, mechanical obstructions (like strictures or malignancy) typically present with dysphagia to solids first, progressing to liquids. **1. Why Barium Swallow is the Correct Answer:** Barium swallow is the **initial investigation of choice** for dysphagia. It provides a "road map" of the esophagus, helping to differentiate between structural and functional causes. In Achalasia, it classically shows the **"Bird’s Beak" appearance** (tapering of the lower esophageal sphincter with proximal dilatation). It is non-invasive and helps the clinician avoid accidental perforation during a subsequent endoscopy if a large diverticulum (like Zenker’s) is present. **2. Why other options are incorrect:** * **Esophagoscopy:** While it is the most important investigation to **rule out malignancy** (pseudo-achalasia) and is mandatory before treatment, it is usually the second step. It is invasive and may miss subtle motility patterns. * **Ultrasound of the chest:** This has no diagnostic role in evaluating the lumen or motility of the esophagus. * **CT Scan of the chest:** This is used for staging esophageal cancer but is not a primary screening tool for dysphagia or motility disorders. **Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** Esophageal Manometry (shows incomplete relaxation of LES and aperistalsis). * **Most Common Symptom:** Dysphagia to both solids and liquids (paradoxical dysphagia). * **Heller’s Myotomy:** The surgical treatment of choice. * **Rule of Thumb:** For any dysphagia, **Barium Swallow** is the first/initial test, while **Endoscopy** is the best test to rule out cancer.
Question 898: Which of the following is NOT true about achalasia?
- A. It predisposes to malignancy.
- B. Body peristalsis is normal. (Correct Answer)
- C. Lower esophageal sphincter (LES) pressure is increased.
- D. There is dilatation of the proximal segment.
Explanation: **Explanation:** Achalasia cardia is a primary esophageal motility disorder characterized by the degeneration of the inhibitory neurons in the **myenteric (Auerbach’s) plexus**. This leads to a failure of the Lower Esophageal Sphincter (LES) to relax and a complete loss of organized peristalsis. **1. Why Option B is the correct answer (The False Statement):** In achalasia, the hallmark of the disease is **aperistalsis** (absence of peristalsis) in the distal two-thirds of the esophageal body. The smooth muscle fibers fail to coordinate, leading to simultaneous, non-propulsive contractions. Therefore, saying "body peristalsis is normal" is medically incorrect. **2. Analysis of other options:** * **Option A (Predisposes to malignancy):** Chronic stasis of food leads to esophagitis and mucosal changes. Patients have a significantly increased risk (approx. 15–30 times) of developing **Squamous Cell Carcinoma**. * **Option C (LES pressure is increased):** Due to the loss of inhibitory neurotransmitters (Nitric Oxide and VIP), the LES remains in a state of tonic contraction. Resting LES pressure is typically **>30 mmHg**. * **Option D (Dilatation of the proximal segment):** Chronic distal obstruction causes the esophagus to dilate proximally to accommodate retained food, eventually leading to a "sigmoid esophagus" appearance. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** Esophageal Manometry (shows aperistalsis and incomplete LES relaxation). * **Barium Swallow Sign:** "Bird’s Beak" or "Rat-tail" appearance. * **Triad of Achalasia:** 1. Incomplete LES relaxation, 2. Increased LES tone, 3. Aperistalsis. * **Treatment of Choice:** Laparoscopic Heller’s Myotomy with partial fundoplication (Dor or Toupet). * **Chagas Disease:** A common cause of secondary achalasia (pseudoachalasia) globally.
Question 899: What is the most common site of Curling's ulcer?
- A. Proximal Duodenum (Correct Answer)
- B. Esophagus
- C. Distal duodenum
- D. Jejunum
Explanation: **Explanation:** **Curling’s ulcer** is a type of stress-induced acute peptic ulcer that occurs as a complication of severe **burns**. The underlying pathophysiology involves severe hypovolemia and hemoconcentration, leading to reduced mucosal blood flow (ischemia) in the gastrointestinal tract. This ischemia impairs the protective mucosal barrier, allowing gastric acid to cause acute erosions and ulceration. * **Why Option A is Correct:** The **proximal duodenum** (specifically the first part) is the most common site for Curling’s ulcers, though they can also occur in the stomach. These ulcers are often deep and have a high propensity for perforation or severe hemorrhage. * **Why Options B, C, and D are Incorrect:** While stress ulcers can occasionally involve the esophagus or distal small bowel in extreme systemic shock, these are not the characteristic sites. The jejunum and distal duodenum are rarely involved because the primary insult is acid-peptic in nature, which predominantly affects the gastroduodenal mucosa. **Clinical Pearls for NEET-PG:** * **Curling vs. Cushing:** Remember the mnemonic: **C**urling is for **B**urns (think "Curling iron" causes burns); **C**ushing is for **I**ntracranial pressure (associated with brain tumors or head trauma). * **Cushing’s Ulcer:** Unlike Curling’s, Cushing’s ulcers are caused by vagal overstimulation leading to gastric acid hypersecretion and are more commonly found in the **stomach**. * **Prophylaxis:** In modern burn units, the incidence of Curling’s ulcer has significantly decreased due to aggressive fluid resuscitation and the routine use of H2 blockers or Proton Pump Inhibitors (PPIs).
Question 900: All of the following are true about Retained Antrum Syndrome except:
- A. Technetium 99m scan is used for diagnosis
- B. Seen after Billroth II surgery
- C. Positive Secretin Stimulation Test (Correct Answer)
- D. Calcium Provocation test is negative
Explanation: **Explanation:** **Retained Antrum Syndrome (RAS)** occurs when a portion of the gastric antrum is inadvertently left behind attached to the duodenal stump following a **Billroth II gastrectomy**. Because this antral tissue is no longer exposed to acidic gastric contents, the G-cells are constantly stimulated to release **Gastrin**, leading to hypergastrinemia and recurrent stomal ulcers. 1. **Why Option C is the correct answer (False statement):** In RAS, the **Secretin Stimulation Test is negative** (gastrin levels decrease or remain stable). In contrast, a **Positive Secretin Test** (paradoxical rise in gastrin >200 pg/mL) is the hallmark of a **Zollinger-Ellison Syndrome (Gastrinoma)**. This is the primary clinical method used to differentiate between the two conditions. 2. **Analysis of other options:** * **Option A:** **Technetium 99m pertechnetate scan** is the diagnostic imaging of choice as it is taken up by the ectopic gastric mucosa in the duodenal stump. * **Option B:** It is specifically seen after **Billroth II** reconstruction because the duodenal stump is excluded from the food stream and acid flow. * **Option D:** The **Calcium Provocation Test** is typically **negative** or shows a minimal rise in RAS, whereas it shows a significant increase in Gastrinoma. **High-Yield Clinical Pearls for NEET-PG:** * **Pathophysiology:** Loss of feedback inhibition of G-cells due to alkaline environment in the duodenum. * **Differential Diagnosis:** Always differentiate RAS from Gastrinoma using the Secretin Test. * **Treatment:** Surgical excision of the residual antral stump (often performed laparoscopically). * **Key Distinction:** * **RAS:** Secretin test (-), Tc-99m scan (+). * **Gastrinoma:** Secretin test (+), Tc-99m scan (-).
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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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