Gastrointestinal Surgery Practice Questions

Q: Heller myotomy is indicated in which of the following conditions?

Achalasia cardiae. **Explanation:** **Achalasia Cardiae (Correct Answer):** Achalasia is a primary esophageal motility disorder characterized by the failure of the Lower Esophageal Sphincter (LES) to relax and the absence of peristalsis in the distal esophagus. This is due to the degeneration of the myenteric (Auerbach’s) plexus. **Heller’s Myotomy** is the surgical treatment of choice. It involves performing a longitudinal incision through the muscular layers (circular and longitudinal) of the distal esophagus and the proximal stomach (cardia) to relieve the functional obstruction. It is now most commonly performed laparoscopically and is usually combined with an anti-reflux procedure (e.g., Dor or Toupet fundoplication) to prevent postoperative GERD. **Incorrect Options:** * **CHPS:** The surgical treatment for Congenital Hypertrophic Pyloric Stenosis is **Ramstedt’s Pyloromyotomy**, which involves splitting the hypertrophied pyloric muscle. * **Carcinoma of the Esophagus:** Treatment typically involves esophagectomy (e.g., Ivor-Lewis or McKeown procedure), radiotherapy, or chemotherapy, depending on the stage. Myotomy has no role in malignancy. * **Hiatal Hernia:** Management involves hernia sac reduction and **Cruroplasty** (repair of the diaphragmatic hiatus), often combined with a Nissen fundoplication. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Diagnosis:** Esophageal Manometry (shows "Bird’s beak" appearance on Barium swallow). * **Manometry Finding:** Incomplete LES relaxation (residual pressure >10 mmHg) and aperistalsis. * **Modified Heller’s Myotomy:** The incision extends 5 cm above the gastroesophageal junction and 2 cm below it onto the stomach. * **POEM (Per-Oral Endoscopic Myotomy):** A newer, minimally invasive endoscopic alternative to Heller’s Myotomy.

Q: What is the most common site of an intra-peritoneal abscess?

Pelvic region. **Explanation:** The **Pelvic region (Pouch of Douglas in females or Rectovesical pouch in males)** is the most common site for intra-peritoneal abscesses. This is primarily due to the effects of **gravity** and the anatomical configuration of the peritoneal cavity. When a patient is in an upright or semi-recumbent position, infected peritoneal fluid or inflammatory exudate naturally drains downward along the paracolic gutters into the most dependent part of the abdomen—the pelvis. Additionally, the pelvis is a frequent site for primary pathologies like appendicitis, diverticulitis, and pelvic inflammatory disease (PID). **Analysis of Incorrect Options:** * **Morrison’s Pouch (Right Subhepatic Space):** While this is the most dependent part of the *upper* abdominal cavity when a patient is supine, it is the second most common site overall. It frequently collects fluid from the gallbladder or perforated duodenal ulcers. * **Omental Bursa (Lesser Sac):** Abscesses here are uncommon and usually secondary to acute pancreatitis (pseudocysts) or posterior gastric wall perforations. * **Left Subhepatic Pouch:** This is a rare site for abscess formation as it is anatomically restricted and does not serve as a primary drainage pathway for gravity-fed fluid. **NEET-PG High-Yield Pearls:** * **Most common site overall:** Pelvic cavity. * **Most common site in the upper abdomen:** Morrison’s pouch (Right subhepatic space). * **Clinical Presentation:** Pelvic abscesses often present with "spurious diarrhea" (mucus discharge) and urinary frequency due to irritation of the rectum and bladder. * **Management:** The preferred treatment for a pelvic abscess is drainage via the rectum (proctotomy) or the posterior vaginal fornix (colpotomy).

Q: Which of the following are investigations for duodenal ulcer?

Barium meal, Upper GI endoscopy, Abdominal X-ray erect view. **Explanation:** The diagnosis of duodenal ulcer (DU) relies on identifying the ulcer niche and assessing for potential complications like perforation. 1. **Upper GI Endoscopy (UGIE):** This is the **gold standard** and most sensitive investigation. It allows direct visualization of the ulcer, assessment of size/depth, and the ability to perform a biopsy (though DU is rarely malignant compared to gastric ulcers) or a Rapid Urease Test (RUT) for *H. pylori*. 2. **Barium Meal:** Historically significant, it shows the "ulcer niche" (barium-filled crater) or "clover-leaf deformity" in chronic cases due to scarring. Note that Barium *swallow* is for the esophagus, while Barium *meal* is for the stomach and duodenum. 3. **Abdominal X-ray (Erect View):** This is crucial for diagnosing a **perforated duodenal ulcer**. It reveals "pneumoperitoneum" (gas under the diaphragm) in approximately 75-80% of perforation cases. **Analysis of Incorrect Options:** * **Options A & C:** Include **Barium swallow**, which is used to evaluate the esophagus (e.g., achalasia, motility disorders) and does not reach the duodenum effectively for ulcer diagnosis. * **Option D:** **Hypotonic duodenography** is a specialized technique used primarily to visualize periampullary tumors or pancreatic pathologies by inducing duodenal atony; it is not a routine or primary investigation for simple duodenal ulcers. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** First part of the duodenum (usually the anterior wall). * **Perforation:** Most common on the **anterior wall**. * **Bleeding:** Most common from the **posterior wall** (erosion of the gastroduodenal artery). * **H. pylori:** Associated with >90% of duodenal ulcers. * **Investigation of Choice for Perforation:** X-ray Chest/Abdomen (Erect) showing free air under the diaphragm.

Q: A patient is admitted to the hospital after ingesting lye. The following day he complains of chest pain. His pulse is 120 bpm. On physical examination, he is found to have subcutaneous crepitus on palpation. His chest x-ray shows widening of the mediastinum and a pleural effusion. What has most likely occurred?

Esophageal perforation. **Explanation:** The clinical presentation is classic for **Esophageal Perforation** secondary to caustic ingestion. Lye (a strong alkali) causes **liquefactive necrosis**, which deeply penetrates the esophageal wall, leading to rapid transmural destruction and perforation. **Why Option C is correct:** The triad of **chest pain, tachycardia (120 bpm), and subcutaneous crepitus** (Hamman’s sign/subcutaneous emphysema) strongly indicates air escaping from the esophagus into the mediastinum and soft tissues. The chest X-ray findings of **mediastinal widening** (mediastinitis) and **pleural effusion** further confirm a full-thickness breach in the esophageal integrity. **Why other options are incorrect:** * **A. Aortic rupture:** While it causes chest pain and mediastinal widening, it does not cause subcutaneous crepitus and is not a typical complication of lye ingestion. * **B. Coagulation necrosis:** This is characteristic of **acid ingestion**, which forms a limiting eschar. Lye causes *liquefactive necrosis*, which is far more invasive and prone to perforation. * **D. Oropharyngeal inflammation:** While present after ingestion, it cannot account for systemic symptoms like tachycardia, mediastinal widening, or crepitus. **NEET-PG High-Yield Pearls:** * **Alkali (Lye):** Liquefactive necrosis (deeper injury). Most common site of stricture: Middle third of the esophagus. * **Acid:** Coagulation necrosis (superficial injury). Most common site of injury: Pre-pyloric region of the stomach. * **Management:** Early endoscopy (within 12–24 hours) is the gold standard to grade the injury, but it is **contraindicated** if perforation is already suspected clinically or radiologically. * **Mackler’s Triad (for perforation):** Vomiting, chest pain, and subcutaneous emphysema.

Q: What is the most common type of esophageal cancer?

Squamous cell carcinoma. **Explanation:** **1. Why Squamous Cell Carcinoma (SCC) is the correct answer:** Globally, **Squamous Cell Carcinoma (SCC)** remains the most common histological type of esophageal cancer. It typically arises from the squamous epithelium lining the esophagus and is most frequently located in the **upper and middle thirds**. While Adenocarcinoma is rapidly increasing in incidence in Western nations (due to obesity and GERD), SCC still accounts for approximately 80–90% of cases worldwide, particularly in the "Asian Esophageal Cancer Belt." **2. Analysis of Incorrect Options:** * **B. Adenocarcinoma:** This is the most common type in **Western countries** and typically arises in the **lower third** of the esophagus from Barrett’s esophagus (metaplastic columnar epithelium). However, globally, it remains second to SCC. * **C. Adenoid cystic carcinoma:** This is a rare primary esophageal malignancy, more commonly associated with salivary glands. It carries a different prognosis and clinical presentation. * **D. Mucoepidermoid carcinoma:** Another extremely rare variant of esophageal cancer characterized by a mixture of squamous and mucus-secreting cells. **3. Clinical Pearls for NEET-PG:** * **Most common site (SCC):** Middle third of the esophagus. * **Most common site (Adenocarcinoma):** Lower third/GE junction. * **Risk Factors (SCC):** Smoking, Alcohol, Achalasia cardia, Tylosis, Corrosive injury, and Plummer-Vinson Syndrome. * **Risk Factors (Adenocarcinoma):** GERD, Barrett’s Esophagus, and Obesity. * **Investigation of choice:** Upper GI Endoscopy with biopsy. * **Staging investigation of choice:** Contrast-Enhanced CT (CECT) for distant spread; Endoscopic Ultrasound (EUS) for T and N staging.

Q: Which of the following is the first symptom to appear in a case of acute intestinal obstruction?

Colicky pain. In acute intestinal obstruction, the sequence of symptoms is a classic high-yield topic for NEET-PG. The correct answer is **Colicky pain**. ### 1. Why Colicky Pain is the First Symptom The hallmark of mechanical obstruction is the body's attempt to overcome the blockage. As soon as the lumen is obstructed, the proximal bowel undergoes vigorous **hyperperistalsis** to push the contents past the site of obstruction. This intense muscular contraction results in intermittent, cramping, or "colicky" abdominal pain. It is almost always the inaugural symptom. ### 2. Why Other Options are Incorrect * **Vomiting:** This follows pain. The timing depends on the level of obstruction: early in high small-bowel obstruction and late (or even absent) in distal large-bowel obstruction. * **Distension:** This occurs as gas and fluid accumulate proximal to the block. It takes time for the bowel to dilate sufficiently to be clinically visible, making it a later sign than pain. * **Constipation (Obstipation):** This is the final cardinal feature. Even after a complete block, the bowel distal to the obstruction may still empty its remaining contents. Absolute constipation (failure to pass flatus or feces) only occurs once the distal segment is evacuated. ### 3. Clinical Pearls for NEET-PG * **Cardinal Features:** The four classic symptoms of obstruction are **Pain, Vomiting, Distension, and Obstipation**. * **Pain Characteristics:** If the pain changes from colicky to **continuous and localized**, it strongly suggests **strangulation** (ischemia), which is a surgical emergency. * **X-ray Findings:** The earliest radiological sign is dilated bowel loops with multiple air-fluid levels (best seen on an erect abdominal X-ray). * **Sequence Rule:** In high-level obstruction, vomiting is prominent and early; in low-level obstruction, distension is prominent and pain is more prolonged.

Q: Which of the following is NOT true for femoral hernias?

More common than inguinal hernias. **Explanation:** The correct answer is **C (More common than inguinal hernias)** because this statement is epidemiologically false. In both males and females, **inguinal hernias are the most common type of groin hernia.** While femoral hernias are significantly more common in females than in males (due to a wider pelvis), they still only account for about 20-25% of all hernias in women, whereas inguinal hernias account for the majority. **Analysis of other options:** * **A. More common in females:** This is true. The female-to-male ratio for femoral hernias is approximately 10:1. * **B. More common to strangulate:** This is true. Due to the narrow, rigid boundaries of the femoral canal (specifically the lacunar ligament), femoral hernias have the highest risk of incarceration and strangulation (approx. 30-40%) among all groin hernias. * **D. Mostly asymptomatic:** This is true. Many femoral hernias remain small and asymptomatic until they present acutely with strangulation or bowel obstruction. They are often missed on physical examination, especially in obese patients. **High-Yield Clinical Pearls for NEET-PG:** * **McVay’s Repair:** The traditional tissue-based repair for femoral hernias (approximates the conjoint tendon to Cooper’s ligament). * **Position:** A femoral hernia is located **below and lateral** to the pubic tubercle (Inguinal hernias are above and medial). * **Richter’s Hernia:** Femoral hernias are the most common site for Richter’s hernia (where only a portion of the bowel wall is entrapped). * **Cloquet’s Node:** A lymph node found within the femoral canal that may be mistaken for an incarcerated femoral hernia.

Q: What is true about oesophageal perforation?

Barium swallow is diagnostic. **Explanation:** Oesophageal perforation is a surgical emergency requiring rapid diagnosis. **Barium swallow** is considered the gold standard for diagnosis (Option A). While Gastrografin (water-soluble contrast) is often used first to avoid barium-induced mediastinitis, it has a higher false-negative rate (approx. 10-25%). If Gastrografin is negative but clinical suspicion remains high, a Barium swallow must be performed as its higher density better detects small leaks. **Analysis of Incorrect Options:** * **Option B:** Treatment is not always primary repair. Management depends on the time of presentation, location, and the state of the underlying oesophagus. Options range from conservative management (small, contained leaks) to diversion or esophagectomy. * **Option C:** The most common cause of oesophageal perforation is **iatrogenic** (e.g., during endoscopy or dilatation), not traumatic injury. * **Option D:** Delaying repair beyond 24 hours significantly increases mortality due to mediastinitis and sepsis. Early intervention (within 24 hours) is the goal for "early" perforations. **Clinical Pearls for NEET-PG:** * **Mackler’s Triad:** Vomiting, chest pain, and subcutaneous emphysema (pathognomonic for Boerhaave Syndrome). * **Most common site (Iatrogenic):** Cricopharyngeus muscle (upper sphincter). * **Most common site (Boerhaave):** Left posterolateral aspect of the distal esophagus (2-3 cm above the GE junction). * **Chest X-ray findings:** Mediastinal widening, pneumomediastinum, or "V sign of Naclerio."

Question 1

Heller myotomy is indicated in which of the following conditions?

Accepted Answer

Achalasia cardiae

Answer

Congenital hypoplastic psoriasis (CHPS)

Answer

Carcinoma of the esophagus

Answer

Hiatal hernia

Question 2

Which of the following statements regarding stress ulcers is true?

Accepted Answer

Stress ulcers most often involve the body and fundus of the stomach.

Answer

Cimetidine should be used prophylactically in intensive care patients to prevent stress ulcers.

Answer

Stress erosions take days to develop and resolve slowly.

Answer

Surgery is usually the best way to cure stress ulcers.

Question 3

What is the most common site of an intra-peritoneal abscess?

Accepted Answer

Pelvic region

Answer

Morrison's pouch

Answer

Omental bursa

Answer

Left subhepatic pouch

Question 4

Among the given populations, the risk of hernia is least in:

Accepted Answer

Obese individuals

Answer

Smokers

Answer

Pregnant women

Answer

Elderly individuals

Question 5

Which of the following are investigations for duodenal ulcer?

Accepted Answer

Barium meal, Upper GI endoscopy, Abdominal X-ray erect view

Answer

Hypotonic duodenography, Barium swallow, Abdominal X-ray erect view

Answer

Hypotonic duodenography, Barium meal, Barium swallow

Answer

Hypotonic duodenography, Barium meal

Question 6

A patient is admitted to the hospital after ingesting lye. The following day he complains of chest pain. His pulse is 120 bpm. On physical examination, he is found to have subcutaneous crepitus on palpation. His chest x-ray shows widening of the mediastinum and a pleural effusion. What has most likely occurred?

Accepted Answer

Esophageal perforation

Answer

Aortic rupture

Answer

Coagulation necrosis

Answer

Oropharyngeal inflammation

Question 7

What is the most common type of esophageal cancer?

Accepted Answer

Squamous cell carcinoma

Answer

Adenocarcinoma

Answer

Adenoid cystic carcinoma

Answer

Mucoepidermoid carcinoma

Question 8

Which of the following is the first symptom to appear in a case of acute intestinal obstruction?

Accepted Answer

Colicky pain

Answer

Constipation

Answer

Vomiting

Answer

Distension

Question 9

Which of the following is NOT true for femoral hernias?

Accepted Answer

More common than inguinal hernias

Answer

More common in females

Answer

More common to strangulate

Answer

Mostly asymptomatic

Question 10

What is true about oesophageal perforation?

Accepted Answer

Barium swallow is diagnostic

Answer

Treatment is primary repair

Answer

Most common after traumatic injury

Answer

Repair delayed beyond 24 hours

Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery — MCQs

On this page

Practice by Chapter

Want unlimited practice?