Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery Indian Medical PG Practice Questions and MCQs

Question 51: Which of the following is NOT a predisposing factor for carcinoma of the esophagus?

A. Achalasia
B. Tylosis palmaris
C. Zenker's diverticulum
D. Ectodermal dysplasia (Correct Answer)

Explanation: **Explanation:** The correct answer is **D. Ectodermal dysplasia**. This condition is a group of genetic disorders affecting the development of hair, teeth, nails, and sweat glands, but it has no established clinical association with esophageal malignancy. **Why the other options are predisposing factors:** * **Achalasia (Option A):** Chronic stasis of food leads to bacterial overgrowth and fermentation, causing chronic mucosal irritation (esophagitis). This increases the risk of **Squamous Cell Carcinoma (SCC)**, typically occurring 15–20 years after the onset of symptoms. * **Tylosis Palmaris (Option B):** Also known as *Howel-Evans syndrome*, this is an autosomal dominant condition characterized by hyperkeratosis of the palms and soles. It has a nearly **95% lifetime risk** of developing esophageal SCC by age 65. * **Zenker’s Diverticulum (Option C):** While rare (0.3–1.5%), chronic irritation and inflammation within the stagnant pouch can lead to the development of SCC. **High-Yield NEET-PG Pearls:** 1. **Histology Match:** Most predisposing factors (Achalasia, Tylosis, Lye ingestion, Plummer-Vinson syndrome) lead to **Squamous Cell Carcinoma**. **Barrett’s Esophagus** is the primary precursor for **Adenocarcinoma**. 2. **Plummer-Vinson Syndrome:** Characterized by the triad of iron deficiency anemia, glossitis, and esophageal webs; it is a significant risk factor for post-cricoid SCC. 3. **Location:** SCC is most common in the **middle third** of the esophagus, whereas Adenocarcinoma is most common in the **lower third** (associated with GERD and obesity). 4. **Dietary Factors:** Deficiencies in Vitamin A, C, and Zinc, as well as the consumption of nitrosamines and very hot beverages, are linked to increased SCC risk.

Question 52: What is the most common site of Morgagni hernia?

A. Right anterior (Correct Answer)
B. Right posterior
C. Left anterior
D. Left posterior

Explanation: **Explanation:** Morgagni hernia is a type of congenital diaphragmatic hernia (CDH) that occurs through the **Foramen of Morgagni**. This is an anterior defect in the diaphragm located between the sternal and costal attachments, specifically in the retrosternal or parasternal area. **1. Why Right Anterior is Correct:** The Foramen of Morgagni is a bilateral potential space. However, **90% of Morgagni hernias occur on the right side.** The reason for this right-sided predominance is that the **heart and pericardium** provide structural support and protection to the left side of the diaphragm, effectively "plugging" the potential defect on the left. Therefore, the right anterior position is the most common site. **2. Why other options are incorrect:** * **Right/Left Posterior:** Posterior defects are characteristic of **Bochdalek hernias**, which occur through the pleuroperitoneal canal. Bochdalek hernias are the most common type of CDH overall (approx. 85-90%) and are usually left-sided. * **Left Anterior:** While Morgagni hernias can occur on the left, they are rare (approx. 2-5%) due to the protective presence of the heart. **Clinical Pearls for NEET-PG:** * **Mnemonic:** **M**orgagni is **M**edial/Anterior; **B**ochdalek is **B**ack (Posterior). * **Presentation:** Unlike Bochdalek hernias, which present with neonatal respiratory distress, Morgagni hernias are often **asymptomatic** in childhood and are frequently discovered incidentally on chest X-rays in adults. * **Radiology:** Typically appears as a mass in the **right cardiophrenic angle**. * **Contents:** The most common content is the **omentum**, followed by the transverse colon. * **Surgical Management:** Always surgical (even if asymptomatic) due to the risk of strangulation.

Question 53: Borchardt's triad of acute epigastric pain, violent retching, and inability to pass a nasogastric tube is seen in patients with?

A. Achalasia cardia
B. Acute gastric volvulus (Correct Answer)
C. Jejunogastric intussusception
D. Hiatus hernia

Explanation: **Explanation:** **Acute Gastric Volvulus** is a surgical emergency characterized by the abnormal rotation of the stomach (more than 180°), leading to closed-loop obstruction and potential ischemia. The classic clinical presentation is defined by **Borchardt’s Triad**, which includes: 1. **Sudden, severe epigastric pain and distension.** 2. **Violent retching** without the ability to produce vomitus (unproductive vomiting). 3. **Inability to pass a nasogastric (NG) tube** into the stomach due to the torsion at the gastroesophageal junction. **Why the other options are incorrect:** * **Achalasia Cardia:** While it involves difficulty passing food into the stomach, it presents with chronic dysphagia and regurgitation of undigested food, not acute epigastric pain or violent retching. * **Jejunogastric Intussusception:** This is a rare complication of prior gastric surgery (like Billroth II). While it presents with pain and vomiting (often hematemesis), it does not typically prevent the passage of an NG tube. * **Hiatus Hernia:** While a large paraesophageal hernia is a major predisposing factor for gastric volvulus, the hernia itself does not cause Borchardt’s triad unless volvulus occurs as a complication. **High-Yield Clinical Pearls for NEET-PG:** * **Types of Volvulus:** **Organo-axial** (rotation around the long axis; most common in adults) and **Mesentero-axial** (rotation around the short axis; more common in children). * **Predisposing Factor:** The most common cause in adults is a **Paraesophageal Hiatus Hernia**. * **Imaging:** X-ray shows a "double bubble" appearance or a single large gas-filled fluid level in the upper abdomen/chest. * **Management:** Immediate surgical detorsion and gastropexy (anchoring the stomach to the abdominal wall).

Question 54: Alvarado scoring in appendicitis includes all of the following expect:

A. Migratory right iliac fossa pain
B. Nausea
C. Elevated temperature
D. Leucopenia (Correct Answer)

Explanation: The **Alvarado Score** (also known by the mnemonic **MANTRELS**) is a clinical scoring system used to diagnose acute appendicitis. The correct answer is **Leucopenia** because the Alvarado score specifically looks for **Leucocytosis** (an elevated white blood cell count), which indicates an active inflammatory response. ### Breakdown of the MANTRELS Mnemonic: * **M: Migratory** right iliac fossa pain (1 point) * **A: Anorexia** (1 point) * **N: Nausea**/Vomiting (1 point) * **T: Tenderness** in the Right Iliac Fossa (2 points) * **R: Rebound** tenderness (1 point) * **E: Elevated** temperature ≥ 37.3°C (1 point) * **L: Leucocytosis** > 10,000/µL (**2 points**) * **S: Shift** to the left (increased neutrophils) (1 point) ### Why the other options are incorrect: * **Migratory RIF pain:** This is a classic feature where pain starts periumbilically and shifts to the RIF. It is a core component (M). * **Nausea:** Gastrointestinal upset is a common secondary symptom included in the score (N). * **Elevated temperature:** A low-grade fever is a clinical sign of inflammation included in the score (E). ### High-Yield Clinical Pearls for NEET-PG: 1. **Maximum Score:** The total score is **10**. 2. **Key Weights:** Only two parameters get **2 points**: **Tenderness in RIF** and **Leucocytosis**. All others get 1 point. 3. **Interpretation:** A score of **7-8** indicates probable appendicitis, while **9-10** indicates almost certain appendicitis (requires surgery). 4. **Modified Alvarado Score:** This version omits the "Shift to the left" (S) parameter, making the total score **9**. 5. **Pediatric equivalent:** The **Pediatric Appendicitis Score (PAS)** is similar but places more emphasis on cough/hop/percussion tenderness.

Question 55: In acute diverticulitis of the colon, what is the typical sigmoidoscopic finding?

A. Inflamed mucosa (Correct Answer)
B. Minute diverticuli are seen
C. Saw-toothed appearance
D. Sigmoidoscope cannot be passed beyond 15 cm

Explanation: **Explanation:** In **acute diverticulitis**, the primary underlying pathology is the inflammation and potential micro-perforation of a diverticulum. When performing a sigmoidoscopy (though generally avoided in the hyper-acute phase), the most characteristic finding is **inflamed, edematous, and hyperemic mucosa**. This reflects the localized inflammatory response of the colonic wall surrounding the affected diverticula. **Analysis of Options:** * **Option A (Correct):** Inflamed mucosa is the direct visual evidence of "itis" (inflammation). The lumen may also appear narrowed due to mural edema. * **Option B:** While diverticula are the underlying cause, the "minute" openings are often obscured by mucosal edema, pus, or fecaliths during an acute episode. * **Option C:** A **"Saw-toothed appearance"** is a classic radiological finding on a **Barium Enema** (due to muscle hypertrophy and shortening of the colon), not a primary sigmoidoscopic finding. * **Option D:** While the procedure may be difficult or painful, the 15 cm mark is arbitrary. This finding is more traditionally associated with rigid sigmoidoscopy in cases of pelvic fixation or distal tumors, rather than a diagnostic hallmark of diverticulitis. **NEET-PG High-Yield Pearls:** * **Gold Standard Investigation:** Contrast-enhanced CT (CECT) of the abdomen is the investigation of choice for acute diverticulitis. * **Contraindication:** Colonoscopy and Barium Enema are **contraindicated** in the acute phase due to the high risk of converting a micro-perforation into a macro-perforation. * **Hinchey Classification:** Used to grade the severity of diverticulitis based on CT findings (Stage I: Pericolic abscess; Stage IV: Fecal peritonitis). * **Most Common Site:** Sigmoid colon (due to high intraluminal pressure).

Question 56: What is the Charles Phillips procedure indicated for?

A. Small bowel atresia
B. Meconium ileus
C. Recurrent small bowel obstruction (Correct Answer)
D. Sigmoid volvulus

Explanation: ### Explanation The **Charles Phillips procedure** (also known as the Phillips plication) is a surgical technique used for the management of **recurrent small bowel obstruction**, particularly when caused by extensive adhesions. **Why the correct answer is right:** In patients with recurrent adhesive small bowel obstruction, simple adhesiolysis often leads to the formation of new, disorganized adhesions that cause further kinking and obstruction. The Charles Phillips procedure involves **transverse plication** of the small bowel loops. By suturing the loops of the small intestine together in a controlled, orderly fashion (serosa-to-serosa), the surgeon ensures that any future adhesions form in a way that maintains a wide, non-obstructive lumen and prevents sharp angulation or "kinking." **Why the incorrect options are wrong:** * **Small bowel atresia:** This is a congenital condition treated by resection of the atretic segment and primary end-to-end anastomosis (e.g., Bishop-Koop or Santulli procedure). * **Meconium ileus:** Initial management is usually non-surgical (Gastrografin enema). If surgery is required, procedures like the Mikulicz exteriorization or Bishop-Koop chimney anastomosis are preferred. * **Sigmoid volvulus:** Acute management involves sigmoidoscopic detorsion. Definitive treatment is a sigmoid colectomy (Resection and primary anastomosis or Hartmann’s procedure). **Clinical Pearls for NEET-PG:** * **Noble’s Plication:** An older, more extensive version of this procedure where the entire mesentery is also sutured. It is rarely performed now due to high complication rates. * **Childs-Phillips Plication:** Uses transmesenteric sutures to arrange the bowel loops in a "serpentine" fashion. * **Indications:** These plication procedures are "salvage" operations reserved for patients with "matted" adhesions where repeated simple adhesiolysis has failed.

Question 57: In carcinoma of the stomach, what does a T4 lesion indicate?

A. Tumor invades adjacent organs (Correct Answer)
B. Tumor invades mucosa
C. Tumor invades submucosa
D. Tumor invades muscularis propria

Explanation: In Gastric Carcinoma, staging is primarily determined by the **AJCC/UICC TNM classification**, which assesses the depth of tumor invasion through the layers of the stomach wall. ### **Explanation of the Correct Answer** **Option A (Tumor invades adjacent organs)** is correct because **T4** represents the most advanced stage of local primary tumor growth. It is further subdivided into: * **T4a:** Tumor invades the serosa (visceral peritoneum) but not adjacent structures. * **T4b:** Tumor invades adjacent structures/organs such as the pancreas, spleen, liver, diaphragm, or abdominal wall. ### **Why Other Options are Incorrect** * **Option B (Mucosa):** This corresponds to **T1a**. The tumor involves the lamina propria or muscularis mucosae. * **Option C (Submucosa):** This corresponds to **T1b**. Note that T1 (a or b) is considered "Early Gastric Cancer" regardless of lymph node status. * **Option D (Muscularis propria):** This corresponds to **T2**. If the tumor invades the subserosa, it is classified as **T3**. ### **NEET-PG High-Yield Pearls** 1. **Early Gastric Cancer (EGC):** Defined as a tumor limited to the mucosa or submucosa (T1), regardless of lymph node involvement. This is a frequent "catch" question. 2. **Most Common Site:** The pyloric antrum is the most common site for gastric cancer. 3. **Investigation of Choice:** Upper GI Endoscopy with biopsy is the gold standard for diagnosis; Contrast-Enhanced CT (CECT) is used for staging. 4. **Virchow’s Node:** An enlarged left supraclavicular lymph node, often the first clinical sign of metastatic gastric cancer (Troisier’s sign).

Question 58: Which vessel is most likely to get affected in ulcer perforation involving the first part of the duodenum?

A. Inferior Vena Cava
B. Gastroduodenal artery (Correct Answer)
C. Superior mesenteric artery
D. Inferior pancreaticoduodenal artery

Explanation: **Explanation:** The **Gastroduodenal Artery (GDA)** is the correct answer due to its critical anatomical relationship with the duodenum. The GDA, a branch of the common hepatic artery, descends vertically **posterior** to the first part of the duodenum. In the context of peptic ulcer disease: * **Anterior wall ulcers** of the first part of the duodenum typically **perforate** into the peritoneal cavity, leading to pneumoperitoneum. * **Posterior wall ulcers** tend to **penetrate** or erode into adjacent structures. Because the GDA lies directly behind the posterior wall of the first part of the duodenum, erosion by a chronic ulcer leads to massive upper gastrointestinal bleeding (hematemesis/melena). **Analysis of Incorrect Options:** * **Inferior Vena Cava (A):** The IVC is a retroperitoneal structure located further posterior and to the right of the midline; it is not in direct contact with the duodenal wall. * **Superior Mesenteric Artery (C):** The SMA passes anterior to the *third* part of the duodenum (duodenal crossing). It is not involved in first-part ulcer complications. * **Inferior Pancreaticoduodenal Artery (D):** This vessel arises from the SMA and supplies the distal part of the duodenum and the head of the pancreas, far from the site of typical first-part ulcers. **NEET-PG High-Yield Pearls:** * **Most common site of Duodenal Ulcer:** 1st part (Duodenal cap). * **Anterior Ulcer:** Perforation (Air under diaphragm). * **Posterior Ulcer:** Bleeding (GDA erosion). * **Management:** For a bleeding GDA, the surgical approach involves a longitudinal duodenotomy and "three-point" ligation of the vessel.

Question 59: McBurney's point tenderness is indicative of which condition?

A. Acute appendicitis (Correct Answer)
B. Acute pancreatitis
C. Acute hepatitis
D. Acute nephritis

Explanation: **Explanation:** **McBurney’s point** is the anatomical landmark located one-third of the distance from the Right Anterior Superior Iliac Spine (ASIS) to the umbilicus. Tenderness at this point is a classic clinical sign of **Acute Appendicitis**. 1. **Why Acute Appendicitis is Correct:** The pain in appendicitis typically begins as vague periumbilical pain (referred pain via T10 dermatome). As the overlying parietal peritoneum becomes inflamed, the pain localizes to the Right Iliac Fossa (RIF). McBurney’s point corresponds to the most common location of the base of the appendix where it attaches to the cecum. 2. **Why the Other Options are Incorrect:** * **Acute Pancreatitis:** Typically presents with epigastric pain radiating to the back, often relieved by leaning forward (Epigastric tenderness). * **Acute Hepatitis:** Presents with pain in the Right Upper Quadrant (RUQ) due to stretching of Glisson’s capsule; associated with hepatomegaly and jaundice. * **Acute Nephritis:** Usually presents with flank pain (costovertebral angle tenderness) and urinary symptoms like hematuria or dysuria. **High-Yield Clinical Pearls for NEET-PG:** * **Rovsing’s Sign:** Pain in the RIF during palpation of the Left Iliac Fossa (indicative of peritoneal irritation). * **Psoas Sign:** Pain on extension of the right hip (suggests a **retrocecal** appendix). * **Obturator Sign:** Pain on internal rotation of the flexed right hip (suggests a **pelvic** appendix). * **Sherren’s Triangle:** Formed by the umbilicus, ASIS, and pubic symphysis; hyperesthesia in this area is a sign of appendicitis. * **Alvarado Score (MANTRELS):** A clinical scoring system used to diagnose appendicitis; a score of ≥7 is highly suggestive.

Question 60: Which of the following statements is NOT true about Zenker's diverticulum?

A. It originates from the posterior wall of the esophagus. (Correct Answer)
B. It occurs through Killian's triangle, an area of weakness.
C. It tends to deviate from the midline, mostly to the left.
D. It is a pulsion diverticulum.

Explanation: **Explanation:** **Zenker’s Diverticulum** is a classic high-yield topic for NEET-PG. The correct answer is **A** because Zenker’s diverticulum is a **false diverticulum** that originates from the **posterior wall of the hypopharynx**, not the esophagus. It occurs specifically above the cricopharyngeal muscle, which marks the boundary between the pharynx and the esophagus. **Analysis of Options:** * **Option A (Incorrect Statement):** It originates in the **Killian’s dehiscence**, located between the thyropharyngeus and cricopharyngeus muscles (parts of the inferior constrictor). Since this occurs above the upper esophageal sphincter, it is technically a pharyngeal diverticulum. * **Option B (True):** Killian’s triangle is a physiological area of weakness in the posterior pharyngeal wall where the muscle layers are sparse, making it the site of herniation. * **Option C (True):** Although it originates in the midline posteriorly, as the sac enlarges, it typically deviates to the **left side** (found in ~90% of cases) because the esophagus lies slightly to the left of the prevertebral fascia. * **Option D (True):** It is a **pulsion diverticulum** caused by increased intraluminal pressure during swallowing, often due to incoordination of the cricopharyngeal muscle. **NEET-PG High-Yield Pearls:** * **Clinical Triad:** Dysphagia, halitosis (foul breath due to undigested food), and regurgitation. * **Boyce’s Sign:** A gurgling sound heard on palpation of the neck. * **Diagnosis:** **Barium Swallow** is the gold standard (shows a "pouch"). Endoscopy is risky due to the danger of perforation. * **Treatment:** Small/Asymptomatic: Observation; Large/Symptomatic: Cricopharyngeal myotomy with or without diverticulectomy (Dohlman’s procedure is the endoscopic approach).

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

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