Gastrointestinal Surgery Practice Questions

Q: Which of the following is the treatment for achalasia?

Surgery when medical treatment has failed. **Explanation:** Achalasia cardia is a primary esophageal motility disorder characterized by the failure of the Lower Esophageal Sphincter (LES) to relax and the absence of progressive peristalsis. The primary goal of treatment is to reduce the outflow resistance at the LES. **Why Option A is Correct:** Management typically follows a stepped approach. While medical therapies (like nitrates or calcium channel blockers) and endoscopic interventions (Botox injection or Pneumatic Dilation) are available, they often provide temporary relief or carry risks of recurrence. **Surgery (Heller’s Myotomy)** is considered the gold standard for definitive treatment. It is indicated when medical management fails to provide symptomatic relief, in young patients, or when pneumatic dilation is contraindicated or unsuccessful. **Why Other Options are Incorrect:** * **Option B (Nissen’s Fundoplication):** This is the treatment of choice for Gastroesophageal Reflux Disease (GERD). In achalasia surgery, a *partial* fundoplication (like Dor or Toupet) is performed alongside a Heller’s Myotomy to prevent reflux, but a 360° Nissen’s is avoided as it would create too much resistance. * **Option C (Medical treatment only):** Medical therapy is the least effective long-term option and is generally reserved for elderly patients or those unfit for surgery/dilation. **NEET-PG High-Yield Pearls:** * **Investigation of Choice:** Esophageal Manometry (shows incomplete LES relaxation and aperistalsis). * **Gold Standard Surgery:** Laparoscopic Heller’s Cardiomyotomy with a partial fundoplication. * **Radiology:** "Bird’s beak" appearance on Barium Swallow. * **POEM (Per-Oral Endoscopic Myotomy):** A newer, minimally invasive endoscopic "scarless" surgical alternative.

Q: In appendicitis, the initial periumbilical pain is eventually localized to the right iliac fossa because of which structure?

Peritoneum. **Explanation:** The shift of pain in acute appendicitis is a classic example of the transition from visceral to somatic pain. 1. **Why Peritoneum is correct:** * **Initial Pain (Visceral):** Early in appendicitis, distension of the appendix stimulates visceral afferent nerve fibers (T8–T10). Since the midgut's visceral nerves are poorly localized, the brain perceives this as dull, vague pain in the **periumbilical region**. * **Localized Pain (Somatic):** As the inflammation progresses, it reaches the serosa and eventually irritates the **parietal peritoneum** lining the abdominal wall. Unlike the viscera, the parietal peritoneum is supplied by somatic nerves, which are highly sensitive and provide precise localization. This results in the classic shift of pain to the **Right Iliac Fossa (McBurney’s point)**. 2. **Why other options are incorrect:** * **Iliopsoas:** While irritation of the psoas muscle (Psoas sign) can occur in retrocecal appendicitis, it is a secondary sign of muscle irritation during hip extension, not the mechanism for pain localization. * **Colon & Caecum:** These are visceral structures. While the appendix is attached to the caecum, inflammation of the bowel wall itself continues to produce vague visceral pain; it is only when the **parietal peritoneum** is involved that localization occurs. **Clinical Pearls for NEET-PG:** * **Sequence of Symptoms (Murphy’s Triad):** Pain first, followed by vomiting, then fever. * **McBurney’s Point:** Located 1/3rd of the distance from the Right Anterior Superior Iliac Spine (ASIS) to the umbilicus. * **Nerve Supply:** Visceral pain is carried by sympathetic fibers; Somatic pain is carried by intercostal nerves (T12/L1). * **Most common position of Appendix:** Retrocecal (75%).

Q: All the following are used to classify stomach malignancies except?

Strasberg classification. The correct answer is **Strasberg classification** because it is used to classify **Bile Duct Injuries** (iatrogenic injuries occurring during cholecystectomy), not stomach malignancies. It categorizes injuries from Type A to E based on the location and extent of the biliary leak or stricture. ### Explanation of Other Options: * **Bormann Classification:** This is the most widely used system for describing the **macroscopic (gross) appearance** of advanced gastric cancer. It divides tumors into four types: * Type I: Polypoid/Fungating * Type II: Ulcerated with well-defined margins * Type III: Ulcerated with infiltrating margins * Type IV: Diffuse infiltrating (Linitis Plastica) * **Lauren Classification:** This is a **histological classification** that divides gastric adenocarcinoma into two main types: * **Intestinal type:** Well-differentiated, associated with environmental factors and H. pylori. * **Diffuse type:** Poorly differentiated, signet ring cells, associated with E-cadherin (CDH1) mutations. * **Japanese Classification (JGCA):** A detailed anatomical classification used for surgical planning, focusing on **lymph node stations** (N1, N2, N3) and the extent of lymphadenectomy (D1 vs. D2). ### NEET-PG High-Yield Pearls: * **Linitis Plastica:** Associated with Bormann Type IV and Lauren Diffuse type; it carries the worst prognosis. * **Strasberg Type E:** Refers to a major circumferential injury to the hepatic duct (further divided by the Bismuth classification). * **Early Gastric Cancer (EGC):** Defined as a tumor limited to the mucosa or submucosa, regardless of lymph node status (classified by the Japanese Endoscopic Society).

Q: POEM is indicated for which of the following conditions?

Achalasia cardia. **Explanation:** **POEM (Per-Oral Endoscopic Myotomy)** is a minimally invasive endoscopic procedure used to treat motility disorders of the esophagus. It involves creating a submucosal tunnel to reach the muscularis propria and performing a selective myotomy of the inner circular muscle layer of the lower esophagus and the Lower Esophageal Sphincter (LES). **Why Achalasia Cardia is the correct answer:** Achalasia is characterized by the failure of the LES to relax and the absence of esophageal peristalsis. POEM has emerged as a first-line treatment (alongside Heller’s Myotomy) because it effectively reduces LES pressure, allowing gravity-assisted passage of food into the stomach. It is particularly preferred for **Type III (Spastic) Achalasia** because it allows for a longer myotomy in the esophageal body than traditional surgery. **Analysis of Incorrect Options:** * **Hiatus Hernia:** This is an anatomical defect where the stomach protrudes through the diaphragm. Treatment involves surgical repair (Cruroplasty) and fundoplication, not myotomy. * **Diffuse Esophageal Spasm (DES):** While POEM can technically be used for DES, Achalasia Cardia is the primary and most established indication. In exams, if both are present, Achalasia is the definitive choice. * **Esophageal Carcinoma:** This is a malignancy requiring esophagectomy, chemotherapy, or radiotherapy. Myotomy is contraindicated as it does not address the tumor. **High-Yield Clinical Pearls for NEET-PG:** * **Eckardt Score:** Used to assess the clinical severity and treatment success in Achalasia. * **Bird’s Beak Appearance:** Classic finding on Barium Swallow for Achalasia. * **Gold Standard Diagnosis:** High-Resolution Manometry (HRM). * **Complication:** The most common side effect of POEM is **Gastroesophageal Reflux Disease (GERD)**, as no anti-reflux procedure (like a Dor wrap) is performed during the endoscopic process.

Q: What is the treatment of choice in ulcerative colitis?

5-aminosalicylic acid. **Explanation:** The treatment of choice for Ulcerative Colitis (UC) depends on the severity and extent of the disease. For **induction and maintenance of remission** in mild-to-moderate UC, **5-aminosalicylic acid (5-ASA)** compounds, such as Mesalamine, are the first-line agents. They work topically on the colonic mucosa to inhibit cytokine production and inflammatory mediators (leukotrienes and prostaglandins). **Analysis of Options:** * **A. 5-aminosalicylic acid (Correct):** It is the gold standard for initial therapy. It can be administered orally or topically (suppositories/enemas) depending on the disease distribution (proctitis vs. pancolitis). * **B. Azathioprine:** This is an immunomodulator used as a **second-line** agent for patients who are steroid-dependent or refractory to 5-ASA. It is not the initial treatment of choice due to its slow onset of action (3–6 months). * **C. Metronidazole:** While useful in Crohn’s disease (especially perianal disease) or Pouchitis, antibiotics have no proven primary role in the standard management of UC. * **D. Salicylates:** While 5-ASA is a salicylate derivative, "Salicylates" (like Aspirin) is a broad term. In the context of IBD, the specific 5-ASA moiety is required; traditional aspirin is ineffective and may even exacerbate GI symptoms. **NEET-PG High-Yield Pearls:** * **Sulfasalazine:** A combination of 5-ASA and sulfapyridine. The sulfapyridine causes most side effects (e.g., male infertility, rash), while 5-ASA is the active therapeutic component. * **Surgery:** Total Proctocolectomy with Ileal Pouch-Anal Anastomosis (IPAA) is the **surgical treatment of choice** and is curative for UC. * **Monitoring:** Patients with UC for >8 years require regular colonoscopic surveillance due to the high risk of Colorectal Carcinoma.

Q: What is true about peptic oesophagitis?

None of the above.. **Explanation:** Peptic oesophagitis (Gastroesophageal Reflux Disease - GERD) is a clinical condition where the reflux of gastric acid causes mucosal damage. The diagnosis is primarily clinical, and the options provided do not accurately reflect the gold standard diagnostic protocols. **Why "None of the above" is correct:** The definitive diagnosis of peptic oesophagitis is not "readily" confirmed by a single routine test like endoscopy or barium swallow because many patients have **Non-Erosive Reflux Disease (NERD)**, where symptoms exist despite a normal-looking mucosa. The gold standard for diagnosing acid reflux is **24-hour ambulatory pH monitoring**. **Analysis of Incorrect Options:** * **Option A:** Barium swallow is insensitive for detecting early or mild oesophagitis. It is primarily used to identify structural complications like strictures, webs, or large hiatus hernias, but it cannot visualize mucosal inflammation or "red-out" signs. * **Option B:** While hiatus hernia is a common predisposing factor for GERD, it is **not** always present. Many patients with severe oesophagitis have a competent hiatus, and conversely, many people with a hiatus hernia remain asymptomatic. * **Option C:** Oesophagoscopy can confirm *erosive* oesophagitis (using the Los Angeles Classification), but it cannot "readily confirm" all cases. Up to 50-70% of patients with reflux symptoms have a macroscopically normal endoscopy (NERD). **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard for GERD diagnosis:** 24-hour pH monitoring (DeMeester Score >14.72). * **Most common symptom:** Heartburn (Pyrosis). * **Investigation of choice for complications (Stricture/Barrett’s):** Endoscopy with biopsy. * **Savary-Miller or Los Angeles Classification:** Used to grade the severity of endoscopic oesophagitis. * **Drug of Choice:** Proton Pump Inhibitors (PPIs).

Q: What is the minimum amount of gastrointestinal bleeding required to cause melena?

60 ml. **Explanation:** Melena refers to the passage of black, tarry, and foul-smelling stools, resulting from the degradation of hemoglobin into **hematin** by gastric acid and intestinal bacteria. **1. Why 60 ml is correct:** Clinical studies and classic surgical teaching (e.g., *Bailey & Love*) establish that a minimum of **60 ml** of blood in the upper gastrointestinal tract is required to produce a single melenic stool. For melena to occur, the blood must typically remain in the GI tract for at least **8 to 14 hours** to allow for sufficient chemical breakdown. **2. Analysis of Incorrect Options:** * **10 ml (Option A):** This amount is insufficient to change the color and consistency of stool to melena. However, as little as **5–10 ml** of blood can result in a positive **Fecal Occult Blood Test (FOBT)**. * **40 ml (Option B):** While some older texts suggest 50 ml, 60 ml is the standardized threshold recognized in most competitive medical examinations. * **115 ml (Option D):** This is well above the minimum threshold. While 100–200 ml will certainly cause melena, it does not represent the *minimum* amount required. **3. Clinical Pearls for NEET-PG:** * **Site of Bleeding:** Melena usually indicates bleeding **proximal to the ligament of Treitz** (Upper GI). However, bleeding from the right colon or small intestine can also present as melena if intestinal transit is slow. * **Hematochezia:** This is the passage of bright red blood per rectum, usually indicating a Lower GI bleed. However, massive Upper GI bleeding (>1000 ml) with rapid transit can also present as hematochezia. * **Pseudo-melena:** Ingestion of iron supplements, bismuth, or charcoal can cause black stools, but these lack the characteristic "tarry" consistency and offensive odor of true melena.

Question 1

Which of the following is the treatment for achalasia?

Accepted Answer

Surgery when medical treatment has failed

Answer

Nissensfundoplication

Answer

Medical treatment only

Answer

None of the above

Question 2

Which of the following is NOT true regarding primary gastric lymphoma?

Accepted Answer

Clinically, it can be easily differentiated from gastric adenocarcinoma by the presence of early satiety and prominent lymph node metastases.

Answer

B symptoms are very rare.

Answer

H. pylori is implicated especially in MALT type.

Answer

It is mostly of B cell origin.

Question 3

In appendicitis, the initial periumbilical pain is eventually localized to the right iliac fossa because of which structure?

Accepted Answer

Peritoneum

Answer

Iliopsoas

Answer

Colon

Answer

Caecum

Question 4

A 75-year-old woman with chronic atrial fibrillation presented with a 2-day history of colicky abdominal pain. Physical examination revealed hypoactive bowel sounds and diffuse abdominal tenderness. Laboratory tests showed a white cell count of 19,400/mm
with 92% neutrophils, a blood urea nitrogen level of 42 mg/dL, and a serum creatinine level of 3.0 mg/dL. What is the investigation of choice?

Accepted Answer

Ultrasound (USG) of the abdomen

Answer

Contrast-enhanced CT abdomen

Answer

Duplex Doppler of the abdomen

Answer

MRI scan of the abdomen

Question 5

Cholecystectomy may lead to an increased risk of which of the following?

Accepted Answer

Proximal colon cancer

Answer

Cancer of the pancreas

Answer

Hepatic cancer

Answer

Cholangiocarcinoma

Question 6

All the following are used to classify stomach malignancies except?

Accepted Answer

Strasberg classification

Answer

Japanese classification

Answer

Bormann classification

Answer

Lauren classification

Question 7

POEM is indicated for which of the following conditions?

Accepted Answer

Achalasia cardia

Answer

Hiatus hernia

Answer

Diffuse esophageal spasm

Answer

Esophageal carcinoma

Question 8

What is the treatment of choice in ulcerative colitis?

Accepted Answer

5-aminosalicylic acid

Answer

Azathioprine

Answer

Metronidazole

Answer

Salicylates

Question 9

What is true about peptic oesophagitis?

Accepted Answer

None of the above.

Answer

Is effectively demonstrated by barium swallow.

Answer

Is always associated with hiatus hernia.

Answer

Can be readily confirmed by oesophagoscopy.

Question 10

What is the minimum amount of gastrointestinal bleeding required to cause melena?

Accepted Answer

60 ml

Answer

10 ml

Answer

40 ml

Answer

115 ml

Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery — MCQs

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