Gastrointestinal Surgery Practice Questions

Q: A 25-year-old female presents with fever for ten days, developing acute pain in the periumbilical region that spreads all over the abdomen. What would be the most likely cause?

Typhoid enteric perforation and peritonitis. **Explanation:** The clinical presentation of a **fever for ten days** followed by sudden-onset periumbilical pain that generalizes is a classic description of **Typhoid (Enteric) Perforation**. 1. **Why Option C is correct:** Typhoid fever, caused by *Salmonella typhi*, typically involves the Peyer's patches in the terminal ileum. During the **third week** of the illness (though it can occur earlier, around day 10-14), these patches undergo necrosis, leading to longitudinal ulcers. If these ulcers erode through the serosa, it results in enteric perforation. The sudden release of bowel contents causes acute peritonitis, initially felt in the periumbilical region before becoming generalized. 2. **Why other options are incorrect:** * **Option A (Intestinal TB):** While common in India, TB usually presents with a more chronic, indolent course (weight loss, night sweats) and typically causes transverse ulcers. Perforation is less common than obstruction. * **Option B (Appendicular Perforation):** This usually begins with periumbilical pain that shifts to the right iliac fossa *before* perforating. A 10-day prodromal fever is atypical for simple appendicitis. * **Option D (Salpingo-oophoritis):** This presents with lower abdominal/pelvic pain and vaginal discharge; a 10-day systemic fever preceding the pain is not the standard presentation. **High-Yield Clinical Pearls for NEET-PG:** * **Site of Typhoid Perforation:** Usually within **60 cm** of the ileocaecal valve. * **Type of Ulcer:** Typhoid causes **longitudinal** ulcers (along the long axis), whereas TB causes **transverse** ulcers. * **Diagnosis:** Gas under the diaphragm on an erect X-ray abdomen is the most common radiological finding in perforation. * **Management:** The treatment of choice is resuscitation followed by primary closure of the perforation (if single) or ileostomy (if multiple/friable).

Q: A 22-year-old woman presents with repeated bouts of vomiting. Physical examination reveals dental caries, tooth erosion, and enlarged parotid glands. Laboratory studies show hypokalemia, metabolic alkalosis, and increased serum bicarbonate. A chest radiograph reveals air in the mediastinum. Which of the following will most likely be present in this patient?

Full thickness, distal esophageal rupture. **Explanation:** The patient presents with classic signs of **Bulimia Nervosa** (dental caries, parotid gland enlargement, hypokalemia, and metabolic alkalosis) complicated by a life-threatening emergency. The presence of **air in the mediastinum (pneumomediastinum)** following repeated vomiting is the hallmark of **Boerhaave Syndrome**. **1. Why the Correct Answer is Right:** **Boerhaave Syndrome (Option A)** is a **full-thickness rupture** of the distal esophagus, typically caused by a sudden increase in intra-esophageal pressure during forceful vomiting or retching. The rupture allows air and gastric contents to enter the mediastinum, leading to pneumomediastinum, mediastinitis, and potentially septic shock. This is a surgical emergency. **2. Analysis of Incorrect Options:** * **Option B (Mallory-Weiss Syndrome):** These are **longitudinal mucosal lacerations** at the gastroesophageal junction. While also caused by vomiting, they are partial-thickness tears and typically present with hematemesis, not pneumomediastinum. * **Option C (Esophageal Varices):** These are dilated submucosal veins caused by portal hypertension (e.g., liver cirrhosis). They present with painless, massive hematemesis. * **Option D (Eosinophilic Esophagitis):** This is an inflammatory condition characterized by "stacked rings" or "feline esophagus" on endoscopy, usually associated with dysphagia and food impaction, not acute rupture from vomiting. **Clinical Pearls for NEET-PG:** * **Mackler’s Triad (Boerhaave Syndrome):** Vomiting, chest pain, and subcutaneous emphysema. * **Metabolic Profile in Bulimia:** Hypokalemia, hypochloremia, and metabolic alkalosis (due to loss of HCl in vomitus). * **Russell’s Sign:** Calluses on the knuckles from self-induced vomiting (common in Bulimia). * **Diagnosis:** Gastrografin (water-soluble) swallow is the initial diagnostic test of choice for esophageal rupture.

Q: Rigler's triad does not include which of the following?

Cholangitis. **Explanation:** **Rigler’s Triad** is the classic radiological finding diagnostic of **Gallstone Ileus**. Gallstone ileus occurs when a large gallstone (usually >2.5 cm) ulcerates through the gallbladder wall into the adjacent duodenum, creating a **cholecystoenteric fistula**. The stone then travels through the small bowel and typically impacts at the **ileocecal valve**, causing a mechanical small bowel obstruction. **Why Cholangitis is the correct answer:** While gallstone ileus originates from gallbladder disease, **Cholangitis** (Option C) is a clinical syndrome characterized by Charcot’s Triad (fever, jaundice, RUQ pain) due to biliary tract infection/obstruction. It is **not** a component of the radiological Rigler’s Triad. **Analysis of incorrect options (Components of Rigler's Triad):** * **Pneumobilia (Option A):** Air in the biliary tree occurs because the cholecystoenteric fistula allows gas from the bowel to enter the bile ducts. * **Ectopic Stone (Option B):** A radiopaque gallstone is visualized in an unusual location, typically the right iliac fossa (the site of the ileocecal valve). * **Intestinal Obstruction (Option D):** Radiographic evidence of small bowel obstruction (dilated loops, air-fluid levels) is present due to the impacted stone. **Clinical Pearls for NEET-PG:** * **Rigler’s Triad:** Pneumobilia + Ectopic stone + Small bowel obstruction. (Note: Only 2 out of 3 are needed for a presumptive diagnosis). * **Most common site of impaction:** Terminal ileum (narrowest part). * **Most common fistula:** Cholecystoduodenal fistula. * **Treatment:** Enterolithotomy (removal of the stone) is the immediate priority. * **Rigler’s Sign (Distinction):** Do not confuse Rigler’s *Triad* with Rigler’s *Sign* (also known as the double-wall sign), which indicates pneumoperitoneum.

Q: High output intestinal fistula is defined as an output of more than how many ml in 24 hours?

500ml. Enterocutaneous fistulas (ECF) are classified based on their daily output, which is a critical factor in determining the risk of fluid-electrolyte imbalance and the likelihood of spontaneous closure. ### **Explanation of the Correct Answer** **Option C (500ml)** is correct. According to the standard surgical classification (often attributed to Sitges-Serra), an intestinal fistula is defined as **high output** if it drains **more than 500 ml in 24 hours**. These fistulas are typically located in the proximal small bowel (duodenum or jejunum). High output makes spontaneous closure less likely and increases the risk of dehydration, malnutrition, and skin excoriation. ### **Analysis of Incorrect Options** * **Option A (200ml):** This is the threshold for **low output** fistulas. A fistula is classified as low output if it drains **less than 200 ml/day**. These have the highest rate of spontaneous closure. * **Option B (300ml):** This falls into the **moderate output** category. Moderate output fistulas are defined as draining between **200 ml and 500 ml/day**. * **Option D (600ml):** While 600 ml is technically "high output," the standard medical definition and the threshold used for classification in surgical textbooks (like Bailey & Love or Sabiston) is 500 ml. ### **Clinical Pearls for NEET-PG** * **Classification by Output:** * Low: 500 ml/day * **FRIEND Mnemonic:** Factors that prevent spontaneous closure of a fistula: **F**oreign body, **R**adiation, **I**nfection/Inflammation (IBD), **E**pithelialization of the tract, **N**eoplasia, and **D**istal obstruction. * **Management:** The initial priority in high-output fistulas is **fluid and electrolyte resuscitation**, followed by nutritional support (often TPN) and skin protection.

Q: What is the commonest cause of mortality following an Ivor Lewis operation?

Anastomotic leak. **Explanation:** The **Ivor Lewis Esophagectomy** (a two-stage procedure involving laparotomy and right thoracotomy) is a major surgical intervention for esophageal cancer. While surgical techniques have evolved, complications remain significant. **1. Why Anastomotic Leak is the Correct Answer:** Anastomotic leak is the most dreaded complication and the **leading cause of mortality** following this procedure. In an Ivor Lewis operation, the anastomosis is performed within the **mediastinum (intrathoracic)**. A leak here leads to rapidly progressive **mediastinitis**, sepsis, and multi-organ failure. Unlike cervical anastomoses (which usually result in manageable cutaneous fistulas), thoracic leaks have a much higher mortality rate due to the lack of containment within the chest cavity. **2. Analysis of Incorrect Options:** * **Pulmonary Atelectasis:** This is the most common **morbidity** (complication) post-esophagectomy, but it is rarely the primary cause of death due to modern physiotherapy and aggressive bronchial hygiene. * **Thoracic Duct Fistula (Chylothorax):** While serious and leading to nutritional/immunological depletion, it occurs in only 2-3% of cases and is usually managed surgically or conservatively before becoming fatal. * **Subdiaphragmatic Collection:** This is a localized complication of the abdominal phase. While it can cause sepsis, it is more easily drained and less lethal than a mediastinal leak. **Clinical Pearls for NEET-PG:** * **Most common complication overall:** Pulmonary complications (Atelectasis/Pneumonia). * **Most common cause of death:** Anastomotic leak. * **Gold standard investigation for leak:** Gastrografin (water-soluble) swallow. * **Vascular supply of the gastric conduit:** Based primarily on the **Right Gastroepiploic Artery**.

Q: A girl presents with complaints of melena. On examination, there are pigmented lesions involving her mouth and lips. Two of her sisters also had similar complaints. Which of the following is the most probable diagnosis?

Peutz-Jeghers syndrome. **Explanation:** The clinical presentation of **melena** (indicating gastrointestinal bleeding), **mucocutaneous pigmentation** (melanotic macules on the lips and buccal mucosa), and a **positive family history** is the classic triad for **Peutz-Jeghers Syndrome (PJS)**. **Why Peutz-Jeghers Syndrome is correct:** PJS is an autosomal dominant condition caused by a mutation in the **STK11 (LKB1)** gene. It is characterized by multiple **hamartomatous polyps** throughout the GI tract (most commonly in the small intestine). Melena occurs due to bleeding from these polyps, and patients are also at high risk for intussusception. The pathognomonic feature is the dark brown/blue pigment spots on the lips and oral mucosa. **Why the other options are incorrect:** * **Cronkhite-Canada Syndrome:** A non-hereditary (sporadic) syndrome. While it involves GI polyposis, it presents with a distinct triad of alopecia, nail dystrophy, and hyperpigmentation of the skin (not specifically oral), usually in older adults. * **Gardner’s Syndrome:** A variant of Familial Adenomatous Polyposis (FAP). It features thousands of adenomatous polyps, osteomas (mandible), and soft tissue tumors (desmoids), but lacks the characteristic perioral pigmentation. * **Turcot’s Syndrome:** Also a variant of FAP or Lynch syndrome, characterized by GI polyposis associated with **Central Nervous System (CNS) tumors** (e.g., medulloblastoma or glioma). **High-Yield Clinical Pearls for NEET-PG:** * **Inheritance:** Autosomal Dominant (STK11 gene on Chromosome 19p). * **Polyp Type:** Hamartomatous (showing a "Christmas tree" branching pattern of smooth muscle). * **Cancer Risk:** Increased risk of GI cancers (colorectal, pancreatic) and extra-intestinal cancers (breast, ovary, cervix, and Sertoli cell tumors of the testes). * **Most common site of polyps:** Small intestine (Jejunum > Ileum > Duodenum).

Q: A 42-year-old patient presents with a sudden upper gastrointestinal bleed of 5 liters of bright red blood, with no significant previous history. What is the most likely diagnosis?

Duodenal ulcer. ### Explanation **1. Why Duodenal Ulcer is the Correct Answer:** In the context of a massive, sudden upper gastrointestinal (UGI) bleed (5 liters), a **Duodenal Ulcer (DU)** is the most likely diagnosis. The underlying medical concept is the anatomical proximity of the posterior wall of the first part of the duodenum to the **gastroduodenal artery**. Erosion of a chronic peptic ulcer into this high-pressure artery leads to torrential, life-threatening hemorrhage. Statistically, Peptic Ulcer Disease (PUD) remains the most common cause of UGI bleeding worldwide. **2. Analysis of Incorrect Options:** * **Oesophageal Varices:** While variceal bleeding is often massive and bright red, it is typically associated with a history of chronic liver disease, portal hypertension, or stigmata like splenomegaly and jaundice. The question specifies "no significant previous history," making DU more probable. * **Gastritis:** This usually presents as "coffee-ground" emesis or melena rather than a sudden 5-liter bright red bleed. It involves diffuse mucosal inflammation rather than a major arterial breach. * **Gastric Erosion:** Similar to gastritis, erosions (like those caused by NSAIDs or stress) involve superficial mucosal layers and rarely result in such massive, rapid exsanguination. **3. Clinical Pearls for NEET-PG:** * **Most common cause of UGI bleed:** Duodenal Ulcer (specifically posterior wall ulcers). * **Vessel involved in DU bleed:** Gastroduodenal artery. * **Vessel involved in Gastric Ulcer bleed:** Left gastric artery (less common than DU bleed). * **Rockall Score & Blatchford Score:** High-yield scoring systems used to predict mortality and the need for intervention in UGI bleeds. * **Management:** The first step in a massive bleed is always **hemodynamic stabilization** (resuscitation) followed by urgent endoscopy.

Q: Milwakulee classification is used for?

Sphincter of Oddi dysfunction. The **Milwaukee Classification** (also known as the Hogan-Geenen Classification) is the standard system used to categorize **Sphincter of Oddi Dysfunction (SOD)**. It helps clinicians determine the necessity of manometry and the likelihood of a successful response to endoscopic sphincterotomy. ### Why Option A is Correct: The classification divides SOD into three types based on clinical presentation (biliary pain), laboratory findings (elevated LFTs), and imaging (dilated common bile duct): * **Type I:** Biliary pain + Elevated LFTs (>2x normal) + Dilated CBD (>10mm). (Definite structural/functional obstruction; manometry not required). * **Type II:** Biliary pain + either Elevated LFTs or Dilated CBD. (Manometry recommended). * **Type III:** Only biliary pain. (Functional; manometry required, but results are often unreliable). ### Why Other Options are Incorrect: * **B. Abnormal Pancreaticobiliary Duct Junction (APBDJ):** This is a congenital anomaly where the pancreatic and bile ducts join outside the duodenal wall. It is associated with choledochal cysts and gallbladder cancer, not the Milwaukee classification. * **C. Acute Pancreatitis:** Commonly graded using the **Atlanta Classification**, Ranson’s Criteria, or the APACHE II score. * **D. Chronic Pancreatitis:** Staged using the **Cambridge Classification** (based on ERCP/imaging) or the TIGAR-O system. ### High-Yield Clinical Pearls for NEET-PG: * **Gold Standard Diagnosis:** Endoscopic Manometry (showing basal pressure >40 mmHg). * **Rome IV Criteria:** Recent updates have moved away from "Type III SOD," now classifying it as "Functional Biliary Pain." * **Post-ERCP Pancreatitis:** Patients with SOD are at the highest risk for this complication; prophylactic pancreatic stents are often used.

Q: A 50-year-old male with a known case of ulcerative colitis presents with acute onset abdominal distention and vomiting. What is the next investigation?

Abdominal X-ray. **Explanation:** The clinical presentation of a patient with long-standing **Ulcerative Colitis (UC)** presenting with acute abdominal distention and vomiting is highly suggestive of **Toxic Megacolon**, a life-threatening complication. **1. Why Abdominal X-ray is the Correct Answer:** An **Erect and Supine Abdominal X-ray** is the initial investigation of choice for suspected toxic megacolon. It is rapid, readily available, and diagnostic. The diagnosis is confirmed radiologically when the transverse or right colon diameter exceeds **6 cm**, accompanied by the loss of haustral markings and clinical signs of systemic toxicity (Jalan’s criteria). **2. Why Other Options are Incorrect:** * **Ultrasound (USG):** While useful for detecting free fluid (ascites), USG is limited by bowel gas, which is abundant in distended loops, making it unreliable for measuring colonic diameter or assessing perforation. * **CT Scan:** Although CT is more sensitive for detecting subtle perforations or abscesses, it is not the *first* step. The priority is a quick X-ray to confirm dilatation. Furthermore, the time taken for a CT may delay emergency management in an unstable patient. * **MRI Abdomen:** MRI has no role in the acute management of inflammatory bowel disease (IBD) complications due to its long acquisition time and high cost. **Clinical Pearls for NEET-PG:** * **Toxic Megacolon Criteria:** Colonic diameter **>6 cm** + 3 of (Fever, Tachycardia, Leukocytosis, Anemia) + 1 of (Dehydration, Altered sensorium, Electrolyte imbalance). * **Contraindication:** In acute flares or suspected toxic megacolon, **Barium Enema and Colonoscopy are strictly contraindicated** due to the high risk of perforation. * **Management:** Initial management is conservative (NPO, IV fluids, steroids, antibiotics). If no improvement occurs within 24–72 hours, the surgical procedure of choice is **Subtotal Colectomy with End Ileostomy.**

Question 1

A 25-year-old female presents with fever for ten days, developing acute pain in the periumbilical region that spreads all over the abdomen. What would be the most likely cause?

Accepted Answer

Typhoid enteric perforation and peritonitis

Answer

Perforation peritonitis due to intestinal tuberculosis

Answer

Generalized peritonitis due to appendicular perforation

Answer

Acute salpingo-oophoritis with peritonitis

Question 2

A 22-year-old woman presents with repeated bouts of vomiting. Physical examination reveals dental caries, tooth erosion, and enlarged parotid glands. Laboratory studies show hypokalemia, metabolic alkalosis, and increased serum bicarbonate. A chest radiograph reveals air in the mediastinum. Which of the following will most likely be present in this patient?

Accepted Answer

Full thickness, distal esophageal rupture

Answer

Lacerations in the mucosa at the junction of the stomach and the esophagus

Answer

Venous dilation in the submucosa

Answer

Visible rings and furrows in the esophagus

Question 3

All of the following statements about Zenker's diverticulum are true EXCEPT:

Accepted Answer

Outpouching of the posterior pharyngeal wall, just above the cricopharyngeus muscle

Answer

Acquired diverticulum

Answer

Lateral X-rays on barium swallow are often diagnostic

Answer

False diverticulum

Question 4

Rigler's triad does not include which of the following?

Accepted Answer

Cholangitis

Answer

Pneumobilia

Answer

Ectopic stone

Answer

Intestinal obstruction

Question 5

High output intestinal fistula is defined as an output of more than how many ml in 24 hours?

Accepted Answer

500ml

Answer

200ml

Answer

300ml

Answer

600ml

Question 6

What is the commonest cause of mortality following an Ivor Lewis operation?

Accepted Answer

Anastomotic leak

Answer

Pulmonary atelectasis

Answer

Thoracic duct fistula

Answer

Subdiaphragmatic collection

Question 7

A girl presents with complaints of melena. On examination, there are pigmented lesions involving her mouth and lips. Two of her sisters also had similar complaints. Which of the following is the most probable diagnosis?

Accepted Answer

Peutz-Jeghers syndrome

Answer

Cronkhite-Canada syndrome

Answer

Gardner's syndrome

Answer

Turcot's syndrome

Question 8

A 42-year-old patient presents with a sudden upper gastrointestinal bleed of 5 liters of bright red blood, with no significant previous history. What is the most likely diagnosis?

Accepted Answer

Duodenal ulcer

Answer

Oesophageal varices

Answer

Gastritis

Answer

Gastric erosion

Question 9

Milwakulee classification is used for?

Accepted Answer

Sphincter of Oddi dysfunction

Answer

Abnormal pancreaticobiliary duct junction

Answer

Acute pancreatitis

Answer

Chronic pancreatitis

Question 10

A 50-year-old male with a known case of ulcerative colitis presents with acute onset abdominal distention and vomiting. What is the next investigation?

Accepted Answer

Abdominal X-ray

Answer

Ultrasound (USG)

Answer

CT scan

Answer

MRI abdomen

Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery — MCQs

On this page

Practice by Chapter

Want unlimited practice?