Gastrointestinal Surgery Practice Questions

Q: Hourglass deformity of the stomach is seen in which of the following conditions?

Gastric stricture. **Explanation:** The **Hourglass deformity** of the stomach is a classic radiological and pathological finding characterized by a constriction in the mid-portion of the stomach, dividing it into two communicating pouches. **Why Gastric Stricture is correct:** The deformity is most commonly caused by the **cicatrization (fibrosis)** of a chronic gastric ulcer, typically located on the lesser curvature. As the ulcer heals, the resulting fibrous tissue contracts, drawing the greater curvature toward the lesser curvature. This creates a permanent **gastric stricture** that narrows the mid-body of the stomach, resembling an hourglass. **Analysis of Incorrect Options:** * **Benign ulcer:** While a benign ulcer is the *precursor* to this condition, the "hourglass" shape refers specifically to the structural **stricture** formed after chronic healing and fibrosis, not the acute ulcer itself. * **Malignant ulcer:** Gastric cancer usually causes irregular, asymmetrical narrowing or a "leather bottle" appearance (Linitis Plastica) rather than the symmetrical, smooth constriction seen in a classic hourglass stomach. * **Achalasia cardia:** This is a motility disorder of the esophagus and the Lower Esophageal Sphincter (LES). It leads to a "Bird’s beak" appearance on barium swallow, affecting the gastroesophageal junction, not the stomach body. **NEET-PG High-Yield Pearls:** * **Tea-pot deformity:** Also caused by chronic gastric ulcer healing, where fibrosis leads to shortening of the lesser curvature and pulling up of the pylorus. * **Leather Bottle Stomach (Linitis Plastica):** Associated with diffuse-type gastric adenocarcinoma (Signet ring cells). * **Steer-horn stomach:** A normal anatomical variant where the stomach lies horizontally (common in hypersthenic individuals). * **Cup-and-spill (Cascade) stomach:** A functional deformity where the fundus folds posteriorly over the body.

Q: Which of the following conditions does not typically present with bleeding per rectum?

Sigmoid volvulus. **Explanation:** The correct answer is **Sigmoid Volvulus**. **1. Why Sigmoid Volvulus is the correct choice:** Sigmoid volvulus is a mechanical obstruction caused by the twisting of the sigmoid colon around its mesenteric axis. The hallmark clinical presentation is a triad of **sudden abdominal pain, absolute constipation (obstipation), and massive abdominal distension**. While it can lead to gangrene if the blood supply is compromised (strangulation), it typically presents as an acute intestinal obstruction rather than a bleeding manifestation. Bleeding per rectum is not a characteristic feature of this condition. **2. Analysis of Incorrect Options:** * **Carcinoma of the rectum:** This is a classic cause of "bright red" bleeding per rectum (hematochezia), often mixed with mucus (spurious diarrhea) and associated with tenesmus. * **Meckel’s Diverticulum:** While inflammation (Meckel’s diverticulitis) mimics appendicitis, the most common presentation in children is painless massive bleeding per rectum due to ectopic gastric mucosa causing ulceration of the adjacent ileal wall. * **Enteric Fever (Typhoid):** In the 3rd week of infection, hyperplasia and subsequent necrosis of Peyer’s patches in the terminal ileum can lead to intestinal perforation or significant gastrointestinal hemorrhage. **Clinical Pearls for NEET-PG:** * **Sigmoid Volvulus X-ray:** Look for the "Coffee Bean sign" or "Omega sign." The apex of the loop usually points toward the Right Upper Quadrant. * **Management:** Initial treatment for stable sigmoid volvulus is **sigmoidoscopic detorsion** (using a flatus tube). If gangrene is suspected, emergency resection (Hartmann’s procedure) is required. * **Meckel's Diverticulum Rule of 2s:** 2 inches long, 2 feet from the ileocecal valve, 2% of the population, presents by age 2, and contains 2 types of ectopic tissue (Gastric/Pancreatic).

Q: Which of the following is NOT true about trichobezoars?

It is caused by Trichuris.. ### Explanation **1. Why Option A is the Correct Answer (The "False" Statement):** The term **Trichobezoar** is derived from the Greek word *thrix* (hair) and the Persian *padzahr* (antidote). It has no association with *Trichuris trichiura* (Whipworm). While both share the prefix "tricho-" (meaning hair-like), *Trichuris* is a nematode infection of the large intestine, whereas a trichobezoar is a physical mass of ingested hair found in the stomach. **2. Analysis of Other Options:** * **Option B & D:** Trichobezoars are indeed a **psychiatric manifestation**. They result from a combination of **Trichotillomania** (an impulse-control disorder characterized by the urge to pull out one's hair) and **Trichophagia** (the compulsive eating/sucking of that hair). * **Option C:** By definition, a trichobezoar is a **concretion of hair** that becomes trapped in the gastric mucosal folds. Because hair is resistant to digestive enzymes and peristalsis, it accumulates into a large, foul-smelling "hairball." **3. Clinical Pearls for NEET-PG:** * **Rapunzel Syndrome:** This is a rare, severe form of trichobezoar where the "tail" of the hair mass extends through the pylorus into the small intestine (duodenum/jejunum), potentially causing obstruction or perforation. * **Demographics:** Most commonly seen in adolescent females with underlying emotional stressors or psychiatric comorbidities. * **Diagnosis:** The gold standard for diagnosis is **Upper GI Endoscopy**. On CT scan, it appears as a well-defined intraluminal mass containing mottled gas bubbles (the "mottled gas" sign). * **Treatment:** Small bezoars may be removed endoscopically, but large trichobezoars usually require **Laparotomy** (gastrotomy) for removal. Psychiatric counseling is mandatory to prevent recurrence.

Q: Which of the following is NOT a type of mesenteric cyst?

Epidermoid. **Explanation:** Mesenteric cysts are rare intra-abdominal tumors located between the leaflets of the mesentery, extending from the duodenum to the rectum. The classification of these cysts is based on their histopathological origin. **Why Option D is Correct:** **Epidermoid cysts** are not considered a type of mesenteric cyst. They are typically cutaneous or subcutaneous lesions lined by keratinizing squamous epithelium. While they can rarely occur in the presacral space or spleen, they do not originate from the mesenteric layers. **Why the other options are incorrect:** * **Mesothelial (Option A):** These are the most common type. They arise from the lining of the serous membranes (peritoneum) and can be simple cysts or lymphangiomas. * **Enterogenous (Option B):** These are also known as enteric duplication cysts. They are lined by intestinal epithelium (often containing smooth muscle in the wall) and represent a developmental anomaly during the formation of the gut tube. * **Chylolymphatics (Option C):** These arise from sequestered lymphatic tissue. They are thin-walled and contain "chyle" (milky fluid) if they are associated with the small bowel mesentery, or serous fluid if associated with the colonic mesentery. **Clinical Pearls for NEET-PG:** * **Most common site:** The mesentery of the **ileum** is the most frequent location. * **Clinical Presentation:** Often asymptomatic but can present with the **"Tillaux’s Sign"**—a clinical finding where the cyst is mobile in a direction perpendicular to the axis of the mesentery (side-to-side) but not longitudinally. * **Treatment of Choice:** Complete **surgical excision (enucleation)** is preferred to prevent recurrence and rule out rare malignant transformation. If the blood supply to the adjacent bowel is compromised, bowel resection may be necessary.

Q: What is the most useful method to diagnose upper gastrointestinal hemorrhage?

Endoscopy. **Explanation:** **Upper Gastrointestinal Endoscopy (UGIE)** is the gold standard and the most useful diagnostic method for upper GI hemorrhage. Its superiority lies in its high sensitivity and specificity (over 90%) for identifying the source of bleeding. Beyond diagnosis, it offers unique **therapeutic potential** (e.g., band ligation, sclerotherapy, or thermal coagulation) and allows for risk stratification using the Forrest Classification. **Analysis of Incorrect Options:** * **A. Barium Study:** This is contraindicated in acute GI bleeding. Barium can obscure the visual field for subsequent endoscopy or angiography and cannot detect superficial mucosal lesions like Mallory-Weiss tears or gastritis. * **B. Celiac Angiography:** This is an invasive procedure reserved for cases where endoscopy fails to localize the site or when bleeding is too brisk to visualize. It requires an active bleeding rate of at least **0.5 ml/min** to be diagnostic. * **C. Gastric Biopsy:** While useful for diagnosing the underlying cause of a lesion (like malignancy or *H. pylori*), it is not a primary tool for diagnosing the site or cause of an acute hemorrhage. **Clinical Pearls for NEET-PG:** * **Timing:** For best results, endoscopy should be performed within **24 hours** of presentation. * **First Step in Management:** Hemodynamic stabilization (ABC – Airway, Breathing, Circulation) always precedes diagnostic endoscopy. * **Most Common Cause:** Peptic ulcer disease remains the most common cause of upper GI bleed globally. * **Nasogastric (NG) Aspiration:** A bloody aspirate confirms an upper GI source, but a clear aspirate does not rule it out (as the bleed may be distal to the pylorus).

Q: What is the most common cause of infection and collection of fluid in the left subhepatic space?

Complicated acute pancreatitis. ### Explanation The **left subhepatic space** is anatomically synonymous with the **lesser sac (omental bursa)**. It is a potential space located behind the stomach and the lesser omentum, and in front of the pancreas. **Why "Complicated Acute Pancreatitis" is correct:** The pancreas forms the majority of the posterior boundary of the lesser sac. In cases of acute pancreatitis, inflammatory exudate, enzymatic fluid, and necrotic debris are released directly into this space. This leads to the formation of a **pancreatic pseudocyst** or an infected collection (abscess) within the lesser sac. Because of its direct anatomical proximity, pancreatitis is the most frequent cause of fluid accumulation in this specific compartment. **Analysis of Incorrect Options:** * **A & B (Gastric/Duodenal Perforation):** While a posterior gastric ulcer or a posterior duodenal ulcer can leak into the lesser sac, these are statistically less common than pancreatitis. Most gastric perforations occur on the anterior wall, leading to generalized peritonitis or collection in the subphrenic spaces. * **D (Liver Abscess):** An abscess of the left lobe of the liver typically ruptures into the left subphrenic space (above the liver) or the greater sac, rather than the lesser sac. **NEET-PG High-Yield Pearls:** * **Anatomy:** The lesser sac communicates with the greater sac via the **Foramen of Winslow (Epiploic foramen)**. * **Boundaries:** The anterior wall is the stomach/lesser omentum; the posterior wall is the pancreas. * **Clinical Sign:** On a CT scan, a fluid collection behind the stomach in a patient with elevated amylase/lipase is pathognomonic for a pancreatic pseudocyst in the lesser sac. * **Subhepatic Spaces:** The *right* subhepatic space is known as **Morison’s Pouch**, which is the most dependent part of the abdominal cavity in a supine patient.

Q: What is the most common malignancy of the small intestine?

The most common malignant tumor is adenocarcinoma.. **Explanation:** Small bowel malignancies are rare, accounting for less than 5% of all gastrointestinal cancers. Among these, **Adenocarcinoma** is the most common histological type (approx. 30-40%), followed by neuroendocrine tumors (carcinoids), lymphomas, and GISTs. **Analysis of Options:** * **Option C (Correct):** Adenocarcinoma is the most frequent primary malignancy. It most commonly occurs in the **duodenum** (specifically the periampullary region), followed by the jejunum and ileum. * **Option A (Incorrect):** The cecum is the first part of the large intestine, not the small intestine. The most common site for small bowel adenocarcinoma is the **duodenum**. * **Option B (Incorrect):** The most common site for a carcinoid tumor in the entire GIT is the **appendix** (historically) or the **small intestine (ileum)** and rectum in recent epidemiological studies. The jejunum is a rare site for carcinoids. * **Option D (Incorrect):** While small bowel malignancy is indeed rare, the physiological reasons are **increased** intestinal transit time (rapid flow reduces contact with carcinogens), a more liquid content (diluting carcinogens), and high levels of **IgA** and **Benzopyrene hydroxylase** (detoxifying enzymes). **NEET-PG High-Yield Pearls:** * **Most common site for Small Bowel Adenocarcinoma:** Duodenum. * **Most common site for Small Bowel Carcinoid:** Ileum (distal 2 feet). * **Most common site for Small Bowel Lymphoma:** Ileum (due to Peyer’s patches). * **Risk Factors:** Crohn’s disease (increases risk of adenocarcinoma in the ileum), Celiac disease (associated with Enteropathy-associated T-cell lymphoma - EATL), and FAP.

Question 1

Hourglass deformity of the stomach is seen in which of the following conditions?

Accepted Answer

Gastric stricture

Answer

Benign ulcer

Answer

Malignant ulcer

Answer

Achalasia cardia

Question 2

Which of the following conditions does not typically present with bleeding per rectum?

Accepted Answer

Sigmoid volvulus

Answer

Carcinoma of the rectum

Answer

Inflammation of Meckel's diverticulum

Answer

Enteric fever

Question 3

Which of the following is NOT true about trichobezoars?

Accepted Answer

It is caused by Trichuris.

Answer

It is a psychiatric manifestation.

Answer

It involves balls of hair in the stomach.

Answer

Pulling the hair and sucking of hair is usually seen.

Question 4

All of the following are true about dumping syndrome except:

Accepted Answer

Proton pump inhibitors (PPIs) are very useful in treatment.

Answer

Treatment consists of small meals at short intervals.

Answer

Watery and carbohydrate-rich foods are precipitating factors.

Answer

It may occur after gastrectomy or vagotomy with drainage operations.

Question 5

Which of the following is NOT a type of mesenteric cyst?

Accepted Answer

Epidermoid

Answer

Mesothelial

Answer

Enterogenous

Answer

Chylolymphatics

Question 6

What is the most useful method to diagnose upper gastrointestinal hemorrhage?

Accepted Answer

Endoscopy

Answer

Barium study

Answer

Celiac angiography

Answer

Gastric biopsy

Question 7

What is the most common cause of infection and collection of fluid in the left subhepatic space?

Accepted Answer

Complicated acute pancreatitis

Answer

Perforation at the lesser curvature of the stomach

Answer

Perforation of a posterior duodenal wall ulcer

Answer

Ruptured abscess of the left lobe of the liver

Question 8

What is the most common malignancy of the small intestine?

Accepted Answer

The most common malignant tumor is adenocarcinoma.

Answer

The most common site is the cecum.

Answer

The most common site of a carcinoid tumor in the GIT is the jejunum.

Answer

Malignancy is less common due to decreased intestinal transit and increased enzymatic action.

Question 9

A young female presents with dysphagia for the past 2 years. She also complains of intermittent chest pain. Barium swallow shows dilation of the esophagus with narrowing of the distal esophagus. What is the treatment of choice?

Accepted Answer

Heller's cardiomyotomy

Answer

Esophagectomy

Answer

Dilatation

Answer

Proton pump inhibitors

Question 10

A 69-year-old man with dysphagia is found to have a benign lesion on barium swallow. What should he be told regarding benign tumors and cysts of the esophagus?

Accepted Answer

Leiomyoma is the most common benign tumor encountered in the esophagus.

Answer

Benign tumors of the esophagus occur more commonly than malignant tumors.

Answer

Benign tumors of the esophagus are typically symptomatic at an early age.

Answer

The diagnosis of benign esophageal tumors is best confirmed on chest x-ray.

Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery — MCQs

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