Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery Indian Medical PG Practice Questions and MCQs

Question 191: Ochsner-Sherren regimen is used in the management of which condition?

A. Appendicular abscess
B. Chronic appendicitis
C. Appendicular mass (Correct Answer)
D. Acute appendicitis

Explanation: **Explanation:** The **Ochsner-Sherren regimen** is the classic conservative management strategy for an **Appendicular Mass**. **1. Why Appendicular Mass is Correct:** An appendicular mass forms when the omentum and small bowel loops wrap around an inflamed appendix to localize the infection (phlegmon). Performing surgery in this inflammatory stage is technically difficult and risky, often leading to bowel injury or the need for a right hemicolectomy. The Ochsner-Sherren regimen aims to allow the inflammation to subside. It involves: * Strict NPO (Nothing by mouth) and IV fluids. * Broad-spectrum antibiotics. * Careful monitoring of vitals and mass size. If successful, an **interval appendicectomy** is typically performed 6–8 weeks later. **2. Why Other Options are Incorrect:** * **Appendicular Abscess:** This is a collection of pus. While it may follow a mass, the primary treatment is **percutaneous drainage** under USG/CT guidance, not just conservative observation. * **Chronic Appendicitis:** This is a clinical diagnosis of recurrent pain; the treatment is elective appendicectomy. * **Acute Appendicitis:** The standard of care for uncomplicated acute appendicitis is **early emergency appendicectomy** to prevent perforation. **3. Clinical Pearls for NEET-PG:** * **Criteria for stopping the regimen:** Increasing pain, rising pulse rate, increasing size of the mass, or signs of generalized peritonitis. These indicate failure of conservative management and require immediate surgical intervention. * **Interval Appendicectomy:** Though traditional, recent evidence suggests it may be skipped if the patient remains asymptomatic, but for exams, it remains the standard follow-up. * **Most common cause of failure:** Development of an appendicular abscess.

Question 192: What is the best treatment for an 80-year-old woman presenting with vomiting, retrosternal pain, and a nasogastric tube positioned in her left chest?

A. Remove the tube as the patient is now well and discharged.
B. Evaluate the esophageal myotomy to treat achalasia.
C. Immediate left thoracotomy to treat perforation.
D. Consider surgical reduction of volvulus and diaphragmatic repair. (Correct Answer)

Explanation: ### Explanation The clinical presentation of an 80-year-old woman with vomiting, retrosternal pain, and a nasogastric (NG) tube visible in the left chest on imaging is classic for an **acute gastric volvulus** associated with a large **paraesophageal (Type II-IV) hiatal hernia**. **1. Why Option D is Correct:** The presence of the NG tube in the chest confirms that the stomach has herniated through the diaphragm. The triad of symptoms (vomiting, pain, and inability to pass an NG tube into the abdomen) is known as **Borchardt’s Triad**, a surgical emergency. In an elderly patient, an acute volvulus can lead to gastric strangulation, perforation, or gangrene. The definitive treatment is surgical reduction of the stomach back into the abdomen, assessment of gastric viability, and repair of the diaphragmatic defect (cruroplasty). **2. Why Other Options are Incorrect:** * **Option A:** Removing the tube and discharging the patient is dangerous. The symptoms indicate an acute obstructive process with a high risk of ischemia; conservative management is contraindicated in symptomatic volvulus. * **Option B:** While achalasia presents with dysphagia and retrosternal pain, the NG tube would typically be stuck in the dilated esophagus, not coiled in the chest within a herniated stomach. Myotomy does not address the anatomical defect seen here. * **Option C:** While a "tube in the chest" might suggest perforation, the primary pathology here is the herniation/volvulus. Furthermore, the standard approach for gastric volvulus and hiatal hernia repair is usually **trans-abdominal** (laparoscopic or open), not thoracotomy, unless there are specific complications. **Clinical Pearls for NEET-PG:** * **Borchardt’s Triad:** 1. Acute epigastric pain/distension, 2. Violent vomiting followed by inability to vomit, 3. Inability to pass a nasogastric tube. * **Organo-axial Volvulus:** Most common type (60%); stomach rotates around its long axis (line connecting cardia and pylorus). Often associated with diaphragmatic defects. * **Meso-axial Volvulus:** Stomach rotates around its short axis (line connecting lesser and greater curvatures). * **Imaging:** Look for a "double air-fluid level" on upright X-ray.

Question 193: Splenic vein thrombosis is best treated by?

A. Splenectomy (Correct Answer)
B. Porto-caval shunt
C. Spleno-renal shunt
D. Mesenterico-caval shunt

Explanation: ### Explanation **1. Why Splenectomy is the Correct Answer:** Splenic vein thrombosis (SVT) leads to a specific clinical entity known as **Left-sided (Sinistral) Portal Hypertension**. In this condition, the portal venous pressure remains normal, but the blood from the spleen is forced to divert through the short gastric veins into the submucosal veins of the gastric fundus to reach the portal vein. This results in **isolated gastric varices** (without esophageal varices). Since the pathology is localized to the splenic outflow, **Splenectomy** is the definitive treatment. It removes the source of the high-pressure collateral flow, thereby decompressing the gastric varices and preventing life-threatening hemorrhage. **2. Why Other Options are Incorrect:** * **Porto-caval, Spleno-renal, and Mesenterico-caval shunts (B, C, D):** These are systemic-to-portal shunts used to treat **Generalized Portal Hypertension** (e.g., due to Cirrhosis). In SVT, the portal pressure is already normal; therefore, creating a shunt is unnecessary, technically difficult due to the thrombosis, and fails to address the localized nature of the venous congestion. **3. NEET-PG High-Yield Pearls:** * **Most common cause of SVT:** Chronic Pancreatitis (due to the proximity of the splenic vein to the pancreas). * **Classic Triad:** Isolated gastric varices, normal liver function tests, and a history of pancreatitis. * **Diagnostic Investigation of Choice:** Contrast-Enhanced CT (CECT) or Color Doppler Ultrasound. * **Management Note:** If SVT is asymptomatic and discovered incidentally, surgery is generally not required. Splenectomy is indicated once GI bleeding occurs.

Question 194: What is the most common site of instrumentation perforation in the esophagus?

A. Cervical (Correct Answer)
B. Esophagogastric junction
C. Intra-abdominal
D. Lower third

Explanation: **Explanation:** The most common site of instrumental perforation in the esophagus is the **Cervical esophagus**, specifically at the **Cricopharyngeal junction** (Killian’s dehiscence). **1. Why Cervical is Correct:** The cricopharyngeus muscle acts as the upper esophageal sphincter and is the narrowest part of the entire digestive tract. During endoscopy or intubation, this area is a "blind zone" where the instrument can easily catch on the posterior wall. Furthermore, the posterior wall at this level (Killian’s triangle) is anatomically weak, as it consists only of the thyropharyngeus and cricopharyngeus muscles without a longitudinal muscle layer, making it highly susceptible to iatrogenic injury. **2. Why Incorrect Options are Wrong:** * **Esophagogastric junction & Lower third:** While these are common sites for *spontaneous* perforation (e.g., Boerhaave Syndrome), they are less common for instrumental injury unless there is pre-existing pathology like achalasia or a stricture being dilated. * **Intra-abdominal:** This is the least common site for instrumental injury as the instrument has already passed the major anatomical constrictions (cricoid, aortic arch, and left bronchus) by the time it reaches this segment. **Clinical Pearls for NEET-PG:** * **Most common cause of esophageal perforation:** Iatrogenic/Instrumentation (Endoscopy is the #1 culprit). * **Most common site of Spontaneous perforation:** Left posterolateral aspect of the distal esophagus (Boerhaave Syndrome). * **Mackler’s Triad (Boerhaave):** Vomiting, chest pain, and subcutaneous emphysema. * **Investigation of Choice:** Gastrografin (water-soluble contrast) swallow. * **X-ray finding:** "V sign of Naclerio" (gas outlining the lower mediastinal pleura).

Question 195: Meckel's diverticulum is classified as which of the following?

A. An acquired diverticulum
B. A true diverticulum (Correct Answer)
C. A diverticulum seen in the jejunum
D. A diverticulum seen on the mesenteric side

Explanation: **Explanation:** **Meckel’s Diverticulum** is the most common congenital anomaly of the gastrointestinal tract. It results from the incomplete obliteration of the **vitellointestinal duct** (omphalomesenteric duct) during the 5th–8th week of gestation. 1. **Why Option B is correct:** It is a **true diverticulum** because it contains **all layers of the intestinal wall** (mucosa, submucosa, and muscularis propria). In contrast, "false" diverticula (like Zenker’s or colonic diverticula) only involve the herniation of mucosa and submucosa through the muscular layer. 2. **Why other options are incorrect:** * **Option A:** It is **congenital**, not acquired. Acquired diverticula usually develop later in life due to increased intraluminal pressure. * **Option C:** It is located in the **ileum**, specifically within 2 feet (60 cm) of the ileocecal valve, not the jejunum. * **Option D:** It always occurs on the **antimesenteric border** of the ileum. This is a crucial surgical landmark to distinguish it from duplication cysts, which occur on the mesenteric side. **High-Yield Clinical Pearls (Rule of 2s):** * **2%** of the population is affected. * Located **2 feet** proximal to the ileocecal valve. * Approximately **2 inches** in length. * Contains **2 types of ectopic tissue**: Gastric (most common, causes bleeding) and Pancreatic. * Most common presentation in children is **painless lower GI bleeding** (due to acid secretion from ectopic gastric mucosa causing ileal ulcers). * Most common presentation in adults is **intestinal obstruction**. * **Investigation of choice:** Meckel’s Scan (Technetium-99m pertechnetate scan) which labels ectopic gastric mucosa.

Question 196: An 18-year-old female presents with a three-day history of upper abdominal pain, nausea, vomiting, and abdominal distention. She reports recent weight loss. The aorto-mesenteric angle measured 11°. What is the most appropriate management?

A. Weight gain (Correct Answer)
B. Duodenojejunostomy
C. Contrast-enhanced computed tomography (CECT) to rule out tumors
D. Duodenoduodenostomy

Explanation: ### Explanation This patient presents with classic features of **Superior Mesenteric Artery (SMA) Syndrome** (also known as Wilkie’s syndrome). **1. Why "Weight Gain" is correct:** SMA syndrome occurs when the fat pad between the SMA and the aorta is lost (often due to rapid weight loss, eating disorders, or debilitating illness), causing the SMA to compress the third part of the duodenum. * **Normal Aorto-mesenteric angle:** 25° to 60°. * **Diagnostic Angle in SMA Syndrome:** < 22° (this patient has 11°). The primary management is **conservative**. The goal is to restore the retroperitoneal fat pad to increase the aorto-mesenteric angle. This is achieved through nutritional rehabilitation (small frequent meals, high-calorie liquid diet, or enteral feeding via a nasojejunal tube placed distal to the obstruction) and weight gain. **2. Why other options are incorrect:** * **Duodenojejunostomy (B):** This is the surgical procedure of choice but is reserved for cases where conservative management fails. It is not the first-line treatment. * **CECT (C):** While CECT can confirm the diagnosis (measuring the angle and distance), the question asks for *management*. The diagnosis is already suggested by the clinical triad and the provided angle. * **Duodenoduodenostomy (D):** This is typically used for congenital duodenal atresia/stenosis, not SMA syndrome. **3. Clinical Pearls for NEET-PG:** * **The "Cast Syndrome":** SMA syndrome can occur after spinal surgery or application of a body cast (hyperextension reduces the angle). * **Aorto-mesenteric distance:** Normal is 10–28 mm; in SMA syndrome, it is reduced to **< 8–10 mm**. * **Positioning:** Symptoms may improve in the **Left Lateral Decubitus** or **Prone** position (Hayes maneuver), which widens the angle. * **Strong's Procedure:** A surgical option involving the mobilization of the Ligament of Treitz to allow the duodenum to fall away from the angle.

Question 197: What is the most sensitive test to detect gastrointestinal bleeding?

A. Selective angiography
B. Red blood cell (RBC) scintigraphy (Correct Answer)
C. Fibrinogen studies
D. Stool for occult blood

Explanation: **Explanation:** The detection of gastrointestinal (GI) bleeding depends on the rate of blood loss. **Red blood cell (RBC) scintigraphy (Technetium-99m labeled RBC scan)** is the most sensitive test because it can detect bleeding at rates as low as **0.1 mL/min**. 1. **Why RBC Scintigraphy is Correct:** This nuclear medicine study involves labeling the patient's own RBCs with Tc-99m and re-injecting them. Because the tracer remains in the intravascular compartment for a prolonged period (up to 24 hours), it allows for repeated imaging. This makes it highly sensitive for detecting **intermittent or slow bleeding** that other modalities might miss. 2. **Why Other Options are Incorrect:** * **Selective Angiography:** While highly specific and capable of therapeutic intervention (embolization), it is less sensitive than a tagged RBC scan. It requires a much higher bleeding rate of **0.5–1.0 mL/min** to visualize the extravasation of contrast. * **Fibrinogen Studies:** These are used to assess coagulation status or fibrinogen levels (e.g., in DIC) but have no role in localizing or detecting the site of active GI bleeding. * **Stool for Occult Blood (Guaiac/FIT):** While these can detect microscopic blood, they are screening tools for chronic blood loss (e.g., colorectal cancer) and are not used to localize or quantify active, acute GI hemorrhage. **High-Yield Clinical Pearls for NEET-PG:** * **Most sensitive test:** RBC Scintigraphy (0.1 mL/min). * **Minimum rate for Angiography:** 0.5 mL/min. * **Gold standard for localization/initial management:** Endoscopy (Upper GI/Colonoscopy). * **Provocative Angiography:** May be used if the RBC scan is positive but standard angiography is negative.

Question 198: Aaron's sign is seen in which of the following conditions?

A. Achalasia cardia
B. Hiatus hernia
C. Mediastinum emphysema
D. Acute appendicitis (Correct Answer)

Explanation: **Explanation:** **Aaron’s sign** is a clinical sign characterized by referred pain or distress in the epigastrium or precordial region upon continuous firm pressure over **McBurney’s point**. It is a classic physical finding in **Acute Appendicitis**. **Why it occurs:** The underlying mechanism is related to visceral hyperesthesia. When pressure is applied to the inflamed appendix (or the overlying peritoneum), the sensory impulses travel via visceral afferent fibers to the T10 spinal segment. The brain interprets this irritation as pain originating from the epigastrium, which shares similar embryonic dermatomal origins. **Analysis of Incorrect Options:** * **Achalasia Cardia:** Characterized by dysphagia and "bird-beak" appearance on barium swallow; it does not present with abdominal wall signs. * **Hiatus Hernia:** Presents with GERD symptoms or retrosternal pain; signs like **Saint’s Triad** (Hiatus hernia, gallstones, diverticulosis) are more relevant here. * **Mediastinal Emphysema:** Associated with **Hamman’s sign** (a crunching sound heard over the heart during systole), not abdominal signs. **NEET-PG High-Yield Pearls (Appendicitis Signs):** * **Rovsing’s Sign:** Pain in the RIF when the LIF is palpated. * **Psoas Sign:** Pain on extension of the right hip (suggests retrocecal appendix). * **Obturator Sign:** Pain on internal rotation of the flexed right hip (suggests pelvic appendix). * **Blumberg Sign:** Rebound tenderness (indicates peritonitis). * **Ten Horn Sign:** Pain caused by gentle traction on the right spermatic cord.

Question 199: In which of the following conditions is operative repair favored over conservative management?

A. Boerhaave's syndrome (Correct Answer)
B. Perforation of cervical esophagus
C. Esophageal rupture confined to mediastinum
D. Flexible endoscopic perforation of esophagus

Explanation: **Explanation:** The management of esophageal perforation depends on the mechanism, location, and degree of contamination. **Boerhaave’s syndrome** (post-emetic barogenic rupture) is a surgical emergency because it typically involves a full-thickness longitudinal tear in the distal esophagus, leading to massive contamination of the pleural cavity with gastric contents, enzymes, and bacteria. This results in rapid-onset mediastinitis and sepsis, making **early operative repair** (within 24 hours) the gold standard to prevent high mortality. **Analysis of Options:** * **Perforation of cervical esophagus (B):** These are often small and contained within the neck tissues. If the patient is stable and there is no systemic sepsis, they are frequently managed conservatively with NPO, IV fluids, and antibiotics. * **Esophageal rupture confined to mediastinum (C):** If the perforation is "contained" (demonstrated by contrast remaining within the mediastinum on esophagogram) and the patient is hemodynamically stable without signs of sepsis, conservative management (the Cameron-Mucha criteria) can be attempted. * **Flexible endoscopic perforation (D):** These are "clean" perforations occurring in a fasted patient. If recognized early and the defect is small, they can often be managed conservatively or via endoscopic clipping. **NEET-PG Clinical Pearls:** * **Mackler’s Triad (Boerhaave’s):** Vomiting, chest pain, and subcutaneous emphysema. * **Diagnosis:** Gastrografin swallow is the initial investigation of choice (less irritating than Barium if a leak is present). * **Site:** Most common site for Boerhaave’s is the **left posterolateral aspect** of the distal esophagus (3–5 cm above the diaphragm). * **Time Factor:** Surgery within 24 hours has a significantly better prognosis; beyond 24 hours, primary repair is risky due to friable tissues, often requiring diversion or T-tube drainage.

Question 200: In a patient, excision rather than bypass is preferred for surgical treatment of small intestinal Crohn's disease because why?

A. Excision is safer.
B. Bypass does not relieve symptoms.
C. Excision cures the patient of Crohn's disease, whereas bypass does not.
D. The risk of small intestine cancer is reduced. (Correct Answer)

Explanation: ### Explanation The primary goal of surgery in Crohn’s disease is to manage complications (obstruction, fistula, or perforation) while preserving as much bowel length as possible. **1. Why Option D is Correct:** Patients with long-standing Crohn’s disease have a significantly increased risk of developing **adenocarcinoma** of the small intestine. When a diseased segment is bypassed rather than excised, it remains in the body as a "blind loop." This excluded segment continues to be subject to chronic inflammation, which acts as a precursor for malignancy. **Excision (resection)** removes the diseased tissue entirely, thereby eliminating the potential site for future cancer development in that specific segment. **2. Why the Other Options are Incorrect:** * **Option A:** Excision is generally considered more invasive than a simple bypass. In cases of dense adhesions or "frozen abdomen," bypass may actually be technically safer, though it is oncologically inferior. * **Option B:** Bypass *does* relieve symptoms of obstruction by diverting the fecal stream, but it leaves the underlying inflammatory focus intact. * **Option C:** Crohn’s disease is a **pan-enteric condition** (mouth to anus). Neither excision nor bypass is curative; the disease frequently recurs at the site of anastomosis or elsewhere in the GI tract. ### Clinical Pearls for NEET-PG: * **Surgery of Choice:** The most common surgery for small bowel Crohn’s is **resection and primary anastomosis**. * **Strictureplasty:** This is preferred over resection for multiple short-segment strictures to prevent **Short Bowel Syndrome**. The **Heineke-Mikulicz** technique is used for strictures <7 cm. * **Indication for Surgery:** The most common indication for surgery in Crohn’s disease is **intestinal obstruction**. * **Cancer Risk:** Small bowel adenocarcinoma in Crohn's typically occurs at a younger age compared to the general population and often arises in the distal ileum.

Practice by Chapter

Esophageal Disorders

Practice Questions

Gastric Disorders

Practice Questions

Small Intestine Pathology

Practice Questions

Appendicitis

Practice Questions

Inflammatory Bowel Disease

Practice Questions

Intestinal Obstruction

Practice Questions

Gastrointestinal Bleeding

Practice Questions

Diverticular Disease

Practice Questions

Anorectal Disorders

Practice Questions

Colorectal Neoplasms

Practice Questions

Gastrointestinal Stomas

Practice Questions

Bariatric Surgery Principles

Practice Questions

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