Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery Indian Medical PG Practice Questions and MCQs

Question 641: A 35-year-old lady presented with dysphagia, nocturnal asthma, and weight loss for 6 years. What is the most probable diagnosis?

A. Achalasia cardia
B. Lye stricture of esophagus
C. Gastroesophageal reflux disease (Correct Answer)
D. Carcinoma esophagus

Explanation: **Explanation:** The clinical presentation of chronic dysphagia, weight loss, and **nocturnal asthma** in a 35-year-old patient most strongly points toward **Gastroesophageal Reflux Disease (GERD)**. 1. **Why GERD is correct:** GERD often presents with extra-esophageal manifestations. **Nocturnal asthma** (or chronic cough/wheezing) occurs due to micro-aspiration of gastric acid into the tracheobronchial tree during sleep. Long-standing GERD can lead to **peptic strictures**, causing dysphagia and subsequent weight loss due to reduced oral intake. 2. **Why other options are incorrect:** * **Achalasia Cardia:** While it causes dysphagia and nocturnal regurgitation, the regurgitated material is undigested food (neutral pH), which is less likely to trigger "asthma-like" bronchospasm compared to acid. * **Lye Stricture:** This requires a definitive history of corrosive ingestion. While it causes strictures and dysphagia, it doesn't typically present with nocturnal asthma unless there is a tracheoesophageal fistula. * **Carcinoma Esophagus:** Though it causes weight loss and dysphagia, a 6-year history is too prolonged for untreated malignancy, which usually follows a rapid, progressive course. **Clinical Pearls for NEET-PG:** * **Sandifer Syndrome:** A pediatric manifestation of GERD involving abnormal posturing/torticollis. * **Gold Standard Investigation for GERD:** 24-hour ambulatory pH monitoring (DeMeester Score >14.72). * **Surgical Management:** Nissen Fundoplication (360° wrap) is the procedure of choice. * **Complication:** Barrett’s Esophagus (Metaplasia: Stratified squamous to Columnar epithelium) is a precursor to Adenocarcinoma.

Question 642: How to differentiate between mechanical bowel obstruction and paralytic ileus?

A. Absence of rectal gas (Correct Answer)
B. Abdominal distension
C. Elevation of hemidiaphragm
D. Multiple air-fluid levels

Explanation: In clinical surgery, differentiating between **Mechanical Bowel Obstruction (MBO)** and **Paralytic Ileus** is a common diagnostic challenge. ### **Explanation of the Correct Answer** The presence or absence of **rectal gas** on a plain abdominal X-ray is a key radiological differentiator. * In **Mechanical Obstruction**, there is a physical "blockage" (e.g., adhesions, malignancy). Gas and fluid accumulate proximal to the site of obstruction, while the bowel distal to the block collapses. Therefore, gas is typically **absent in the rectum**. * In **Paralytic Ileus**, there is a global failure of peristalsis without a physical block. Gas is distributed throughout the entire GI tract, including the small bowel, large bowel, and the **rectum**. ### **Why Other Options are Incorrect** * **B. Abdominal distension:** This occurs in both conditions due to the accumulation of gas and fluid in the intestinal loops. * **C. Elevation of hemidiaphragm:** This is a non-specific finding seen in any condition causing significant abdominal distension (including both MBO and ileus), as the distended loops push the diaphragm cranially. * **D. Multiple air-fluid levels:** While classic for MBO (especially the "stepladder pattern"), air-fluid levels can also be seen in paralytic ileus. The difference is that in MBO, the levels are often at different heights within the same loop, whereas in ileus, they are usually at the same level. ### **NEET-PG High-Yield Pearls** * **Auscultation:** MBO presents with high-pitched, "borborygmi" or tinkling bowel sounds. Paralytic ileus presents with **absent** or silent bowel sounds. * **Pain Profile:** MBO is characterized by **colicky** abdominal pain; Paralytic ileus is usually associated with dull, diffuse discomfort. * **X-ray Sign:** The "String of Beads" sign is highly suggestive of mechanical small bowel obstruction. * **Most Common Cause:** Adhesions (Post-operative) are the #1 cause of MBO; Post-operative state and hypokalemia are common causes of ileus.

Question 643: What is the treatment of choice for chronic ulcerative colitis?

A. Colectomy with ileostomy
B. Colectomy with manual proctectomy and ileoanal pouch anastomosis
C. Proctocolectomy with ileoanal anastomosis (Correct Answer)
D. Ileorectal anastomosis

Explanation: **Explanation:** The goal of surgery in Ulcerative Colitis (UC) is to remove the entire diseased mucosa, as UC is a mucosal disease that involves the colon and rectum. **1. Why Option C is Correct:** **Restorative Proctocolectomy with Ileoanal Pouch Anastomosis (IPAA)** is the gold standard and treatment of choice for chronic UC [1]. Since UC involves both the colon and the rectum, a **Proctocolectomy** (removal of both) is necessary to eliminate the disease and the risk of colorectal cancer. The **Ileoanal Anastomosis** (usually with a J-pouch) allows for the preservation of fecal continence and avoids a permanent stoma, providing a better quality of life [1]. **2. Why Other Options are Incorrect:** * **Option A (Colectomy with ileostomy):** This removes the colon but leaves the diseased rectum behind (rectal stump), which carries a persistent risk of inflammation and malignancy [1]. * **Option B (Colectomy with manual proctectomy):** While similar to the correct answer, "Proctocolectomy" is the standard surgical terminology for the procedure. Furthermore, manual dissection is less precise than the standard stapled or hand-sewn pouch techniques used in IPAA. * **Option D (Ileorectal anastomosis):** This is generally avoided in UC because the rectum is almost always involved. Leaving the rectum leads to ongoing proctitis and a high risk of future rectal cancer. **3. NEET-PG High-Yield Pearls:** * **Indications for Surgery:** Intractability to medical treatment (most common), toxic megacolon, perforation, and biopsy showing high-grade dysplasia or carcinoma [1]. * **Emergency Procedure of Choice:** Subtotal colectomy with end-ileostomy (Proctectomy is avoided in the emergency setting due to high morbidity). * **Pouch of Choice:** The **'J-pouch'** is the most commonly created reservoir due to its ease of construction and excellent functional outcomes [1]. * **Extra-intestinal manifestations:** Most improve after proctocolectomy, **except** Primary Sclerosing Cholangitis (PSC) and Ankylosing Spondylitis.

Question 644: A sentinel pile indicates:

A. Carcinoma of the rectum
B. Internal hemorrhoids
C. Perianal fistula
D. Anal fissure (Correct Answer)

Explanation: **Explanation:** A **sentinel pile** (also known as a skin tag) is a characteristic clinical feature of a **chronic anal fissure**. It is a hypertrophied skin tag located at the distal end of the fissure. **Why Anal Fissure is Correct:** An anal fissure is a longitudinal tear in the anoderm, most commonly located in the posterior midline. In the chronic stage (usually >6 weeks), constant irritation and low-grade inflammation lead to secondary changes: 1. **Sentinel Pile:** Edematous skin tag at the lower end. 2. **Hypertrophied Anal Papilla:** Located at the upper end (proximal) of the fissure. 3. **Exposed Sphincter Fibers:** The circular fibers of the internal anal sphincter become visible at the base of the ulcer. **Why Other Options are Incorrect:** * **Carcinoma of the rectum:** Typically presents with altered bowel habits, tenesmus, and bleeding per rectum; it does not produce a sentinel tag. * **Internal hemorrhoids:** These are vascular cushions that prolapse. While they may cause bleeding, they are usually painless (unless thrombosed) and do not feature a sentinel pile. * **Perianal fistula:** Characterized by an external opening on the perineal skin discharging pus or flatus, rather than a solid skin tag at the anal verge. **High-Yield Clinical Pearls for NEET-PG:** * **Location:** 90% of fissures are **posterior midline**. If a fissure is lateral, suspect systemic conditions like Crohn’s disease, TB, or HIV. * **Pathophysiology:** Associated with internal anal sphincter hypertonia and ischemia. * **Management:** The "Gold Standard" surgical treatment is **Lateral Internal Sphincterotomy (LIS)**. First-line medical management includes sitz baths, high-fiber diet, and topical nitrates (Glyceryl Trinitrate) or Calcium Channel Blockers (Diltiazem).

Question 645: Which of the following statements regarding sequelae or complications after gastric operations is not true?

A. Recurrent ulceration is rare after gastric surgery for peptic ulcer. (Correct Answer)
B. Early satiety can occur even in the absence of gastric resection.
C. Early dumping syndrome is due to a sudden high osmotic load to the small bowel.
D. Late dumping syndrome is due to reactive hypoglycemia.

Explanation: **Explanation:** **1. Why Option A is the Correct Answer (The "False" Statement):** Recurrent ulceration (marginal ulcer) is a well-recognized complication of gastric surgery for peptic ulcer disease, occurring in approximately **5–10%** of patients. It is most common after a gastrojejunostomy (Billroth II) or inadequate vagotomy. The primary cause is persistent acid secretion or incomplete removal of the antrum (retained antrum syndrome). Therefore, stating it is "rare" is clinically inaccurate. **2. Analysis of Incorrect Options (True Statements):** * **Option B:** Early satiety occurs due to a loss of gastric reservoir function or impaired receptive relaxation. This can happen after gastric resection, but also after **vagotomy without resection**, as the denervated stomach fails to relax to accommodate food. * **Option C:** Early dumping (occurs 15–30 mins post-prandially) is caused by the rapid delivery of **hypertonic chyme** into the small intestine. This creates a high osmotic gradient, drawing fluid from the intravascular space into the lumen, leading to distension and vasomotor symptoms. * **Option D:** Late dumping (occurs 1–3 hours post-prandially) is caused by a rapid rise in blood glucose leading to an exaggerated insulin surge. This results in **reactive hypoglycemia**, presenting with tremors, sweating, and confusion. **Clinical Pearls for NEET-PG:** * **Most common site for recurrent ulcer:** The jejunal side of the anastomosis (stomal ulcer). * **Management of Dumping:** Initial treatment is always dietary (small, dry, low-carb meals). Octreotide is used for refractory cases. * **Vagotomy types:** Truncal vagotomy requires a drainage procedure (Pyloroplasty) because it causes gastric stasis. Highly Selective Vagotomy (HSV) preserves the "crow’s foot" to the antrum, maintaining motility.

Question 646: A 48-year-old man undergoes surgery for a chronic duodenal ulcer. The procedure is a truncal vagotomy and which of the following?

A. Gastroenterostomy (Correct Answer)
B. Removal of the duodenum
C. Closure of the esophageal hiatus
D. Incidental appendectomy

Explanation: ### Explanation **1. Why Gastroenterostomy is Correct:** Truncal vagotomy (TV) involves the division of the main vagal trunks at the level of the esophageal hiatus. While this successfully reduces acid secretion by denervating the parietal cells and the antral G-cells, it also denervates the **pyloric sphincter** and the antrum. This leads to a loss of coordinated gastric peristalsis and failure of the pylorus to relax, resulting in **gastric stasis** and outlet obstruction. Therefore, a **drainage procedure** is mandatory to allow the stomach to empty. **Gastroenterostomy** (or alternatively, a pyloroplasty) provides this necessary drainage by creating a bypass for gastric contents. **2. Why the Other Options are Incorrect:** * **B. Removal of the duodenum:** This is not part of a standard vagotomy procedure. While a distal gastrectomy (Antrectomy) is sometimes combined with TV (Vagotomy & Antrectomy), the entire duodenum is not removed. * **C. Closure of the esophageal hiatus:** This is the surgical step for repairing a hiatal hernia (cruraplasty), not a treatment for duodenal ulcers. * **D. Incidental appendectomy:** This is not indicated during elective gastric surgery and increases the risk of surgical site infection without clinical benefit. **3. NEET-PG High-Yield Pearls:** * **Truncal Vagotomy (TV):** Highest rate of post-vagotomy diarrhea and dumping syndrome due to total abdominal vagal denervation. * **Highly Selective Vagotomy (HSV):** Denervates only the acid-secreting area (fundus/body). It **preserves** the nerve of Latarjet (pyloric supply), so **no drainage procedure** is required. It has the lowest side-effect profile but the highest recurrence rate. * **Vagotomy + Antrectomy:** Has the **lowest recurrence rate** (approx. 1%) for peptic ulcer disease but the highest morbidity.

Question 647: A mass in the right iliac fossa can be which of the following?

A. Ileocecal tuberculosis
B. Ileocecal neoplasm
C. Ameboma
D. All of the above (Correct Answer)

Explanation: **Explanation:** A mass in the right iliac fossa (RIF) is a common clinical presentation in surgical practice, representing a wide spectrum of pathologies involving the cecum, terminal ileum, appendix, or associated lymph nodes. **Why "All of the above" is correct:** The RIF contains the ileocecal junction, which is a high-risk site for both inflammatory and neoplastic conditions. * **Ileocecal Tuberculosis (A):** This is the most common cause of a chronic RIF mass in developing countries. It typically presents as the "hyperplastic" variety, where chronic inflammation leads to thickening of the bowel wall and mesenteric lymphadenopathy. * **Ileocecal Neoplasm (B):** Carcinoma of the cecum often presents as a palpable, firm, and non-tender mass. Unlike left-sided colon cancers, these rarely cause obstruction early but often lead to iron-deficiency anemia. * **Ameboma (C):** This is a chronic inflammatory complication of *Entamoeba histolytica* infection. It forms a pseudotumor (granuloma) in the wall of the colon, most commonly the cecum, which can clinically mimic a malignancy. **Clinical Pearls for NEET-PG:** * **Most common acute cause:** Appendicular mass (formed by the omentum wrapping around an inflamed appendix). * **Most common chronic cause (India):** Ileocecal Tuberculosis. * **Differential Diagnosis Checklist:** * **Inflammatory:** Appendicular mass/abscess, Crohn’s disease, Actinomycosis. * **Neoplastic:** Cecal carcinoma, Lymphoma, Carcinoid tumor. * **Infectious:** Tuberculosis, Ameboma. * **Others:** Psoas abscess, Iliac lymphadenopathy, Ectopic kidney, or Ovarian tumor. * **High-Yield Fact:** In a patient with a RIF mass and a history of evening rise of temperature, think **Tuberculosis**. If the patient has significant weight loss and anemia, think **Cecal Carcinoma**.

Question 648: Which surgical procedure for duodenal ulcer treatment has the lowest recurrence rate?

A. Highly selective vagotomy
B. Truncal vagotomy (Correct Answer)
C. Truncal vagotomy and antrectomy
D. Truncal vagotomy and pyloroplasty

Explanation: ### Explanation The surgical management of duodenal ulcers involves balancing the reduction of acid secretion with the preservation of gastric motility. The recurrence rate is inversely proportional to the extent of denervation and resection. **1. Why Truncal Vagotomy and Antrectomy is the Correct Answer:** *Note: In standard surgical literature (Bailey & Love, Sabiston), **Truncal Vagotomy (TV) + Antrectomy** is recognized as the "Gold Standard" for preventing recurrence.* It combines the elimination of the cephalic phase of acid secretion (via TV) with the removal of the hormonal (gastrin) phase (via antrectomy). This synergy results in the **lowest recurrence rate (approximately 1%)** among all peptic ulcer surgeries. **2. Analysis of Incorrect Options:** * **Highly Selective Vagotomy (HSV):** Denervates only the acid-secreting parietal cell mass while preserving the nerve of Latarjet (antral pump). While it has the lowest rate of post-gastrectomy complications (dumping/diarrhea), it has the **highest recurrence rate (10–15%)**. * **Truncal Vagotomy and Pyloroplasty (TV + P):** TV eliminates cholinergic stimulation but causes gastric stasis, necessitating a drainage procedure (Pyloroplasty). The recurrence rate is moderate (approx. 5–10%). * **Truncal Vagotomy (Alone):** This is never performed alone for duodenal ulcers because it leads to gastric outlet obstruction due to pyloric spasm. **3. NEET-PG High-Yield Pearls:** * **Lowest Recurrence:** TV + Antrectomy (~1%). * **Lowest Complications/Morbidity:** Highly Selective Vagotomy (HSV). * **Most Common Complication of TV:** Diarrhea (due to rapid intestinal transit). * **Nerve of Latarjet:** The branch of the Vagus nerve preserved in HSV to maintain antral motility. * **Current Trend:** Due to highly effective PPIs and *H. pylori* eradication, these surgeries are now primarily reserved for complications (perforation, obstruction, or bleeding).

Question 649: Stress-induced ulcers are most commonly found in which part of the gastrointestinal tract?

A. Fundus of stomach (Correct Answer)
B. Antrum of stomach
C. Pyloric channel
D. First part of duodenum

Explanation: **Explanation:** Stress-induced ulcers (also known as Stress-Related Erosive Syndrome) are acute mucosal lesions that develop following severe physiological stress, such as major trauma, extensive burns (Curling’s ulcer), or intracranial injury (Cushing’s ulcer). **Why the Fundus is Correct:** Unlike chronic peptic ulcers, which are primarily driven by *H. pylori* or NSAIDs, stress ulcers are caused by **splanchnic hypoperfusion** and mucosal ischemia. The **fundus and body (acid-secreting portions)** of the stomach are the most susceptible to this ischemic insult. The decreased blood flow impairs the mucosal-bicarbonate barrier, allowing gastric acid to cause multiple, superficial erosions. These lesions typically begin in the proximal stomach (fundus) and may progress distally. **Analysis of Incorrect Options:** * **Antrum of stomach:** While the antrum is a common site for *H. pylori*-related gastritis and Type B chronic ulcers, it is less frequently the primary site for acute stress-induced erosions. * **Pyloric channel:** This is a common site for stenosing peptic ulcers but is rarely the initial site for stress-related mucosal damage. * **First part of duodenum:** This is the most common site for **chronic duodenal ulcers**. While Curling’s ulcers (associated with burns) can occur in the duodenum, the vast majority of stress-induced lesions are found in the proximal stomach. **High-Yield Clinical Pearls for NEET-PG:** * **Curling’s Ulcer:** Associated with severe **burns**; typically found in the fundus or duodenum. * **Cushing’s Ulcer:** Associated with **increased intracranial pressure**; these are often single, deep, and have a high risk of perforation. Unlike other stress ulcers, these involve hypersecretion of gastric acid due to vagal stimulation. * **Prophylaxis:** Proton Pump Inhibitors (PPIs) or H2 blockers are standard in ICU settings to prevent these lesions. * **Key Feature:** Stress ulcers are usually **multiple, shallow, and do not involve the muscularis propria**, unlike chronic ulcers.

Question 650: Which of the following is FALSE about vascular ectasia?

A. Associated with cutaneous lesions (Correct Answer)
B. The bleed is usually small and recurrent and never massive
C. The treatment may involve subtotal colectomy in some cases
D. Associated with aortic stenosis

Explanation: **Vascular ectasia** (also known as angiodysplasia) is a common cause of lower gastrointestinal bleeding in the elderly, typically occurring in the cecum and ascending colon. ### **Explanation of Options** * **Why Option A is FALSE (Correct Answer):** Unlike hereditary hemorrhagic telangiectasia (Osler-Weber-Rendu syndrome), vascular ectasia of the colon is **not associated with cutaneous lesions**. It is an acquired degenerative lesion of previously healthy blood vessels, not a systemic congenital syndrome. * **Why Option B is Wrong:** Bleeding in vascular ectasia is typically **chronic, low-grade, and recurrent**, often presenting as iron deficiency anemia or occult blood in the stool. While diverticulosis is the most common cause of massive lower GI bleeds, vascular ectasia rarely presents with life-threatening hemorrhage. * **Why Option C is Wrong:** While endoscopic therapy (Argon Plasma Coagulation) is the first line, **subtotal colectomy** or right hemicolectomy is indicated if the bleeding is life-threatening, recurrent, or if the source cannot be localized in a patient with multiple ectatic lesions. * **Why Option D is Wrong:** There is a well-documented clinical association between **aortic stenosis** and bleeding angiodysplasia, known as **Heyde’s Syndrome**. It is hypothesized that high-grade aortic stenosis leads to an acquired Type 2A von Willebrand deficiency due to the shearing of vWF multimers. ### **High-Yield Clinical Pearls for NEET-PG** * **Location:** Most common in the **Cecum** and right colon (due to the Law of Laplace—highest wall tension). * **Diagnosis:** **Angiography** is the gold standard for diagnosis (shows a "tuft" of vessels or early venous filling), though colonoscopy is the initial investigation of choice. * **Heyde’s Syndrome Triad:** Aortic stenosis, Gastrointestinal bleeding, and Angiodysplasia. * **Age Group:** Usually affects patients **>60 years** of age.

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

Want unlimited practice?

Get full access to all questions, explanations, and performance tracking.

Start For Free