Gastroenterology Practice Questions

Q: All of the following are classification systems of portal hypertensive gastropathy, EXCEPT:

Los Angeles. **Explanation:** The correct answer is **C. Los Angeles**. **1. Why Los Angeles is the correct answer:** The **Los Angeles (LA) Classification** is the gold-standard system used to grade the severity of **Gastroesophageal Reflux Disease (GERD)** based on the extent of mucosal breaks (Grades A to D) [1]. It is not used for portal hypertensive gastropathy (PHG). **2. Analysis of incorrect options (Classification systems for PHG):** * **McCormack Classification:** This is the most widely used system for PHG. It categorizes the condition into **Mild** (fine pinkish speckling/scarlatiniform rash) and **Severe** (discrete red spots or "snake-skin" mosaic pattern). * **Tanoue Classification:** A Japanese classification system that divides PHG into three grades (Grade 1: mild/reddish; Grade 2: severe/mosaic; Grade 3: very severe/hemorrhagic). * **NIEC (New Italian Endoscopic Club):** This system classifies PHG based on the presence of a mosaic pattern and the color of the spots (red or brown), further grading them by severity. **3. High-Yield Clinical Pearls for NEET-PG:** * **Definition:** PHG refers to changes in the gastric mucosa (typically the fundus and body) in patients with portal hypertension, characterized by a **"snake-skin" or "mosaic" appearance**. * **Pathophysiology:** It is caused by congestion and ectasia of mucosal/submucosal vessels, *not* primary inflammation. * **Management:** The mainstay of treatment is reducing portal pressure using **non-selective beta-blockers (Propranolol/Nadolol)**. For refractory bleeding, TIPS may be considered. * **Distinction:** Do not confuse PHG with **GAVE (Gastric Antral Vascular Ectasia)**, also known as "Watermelon Stomach," which is typically found in the antrum and does not always correlate with the severity of portal hypertension [1].

Q: Which of the following would be least likely to cause an ulcer in the distal esophagus?

Zenker's diverticulum. The correct answer is **Zenker’s diverticulum**. The key to this question lies in the **anatomical location**. Zenker’s diverticulum is a pulsion diverticulum occurring at the **Killian’s dehiscence** (between the thyropharyngeus and cricopharyngeus muscles). This is located in the **proximal (upper) esophagus** or hypopharynx [1]. Therefore, it is anatomically impossible for it to cause an ulcer in the **distal esophagus**. **Analysis of Options:** * **HSV (Herpes Simplex Virus):** Viral esophagitis typically affects the squamous epithelium of the mid-to-distal esophagus. HSV characteristically causes small, "punched-out" ulcers. * **Achalasia Cardia:** While primarily a motility disorder, stasis of food and saliva in the dilated distal esophagus can lead to "stasis esophagitis" and subsequent mucosal ulceration [1]. * **Severe Reflux Esophagitis (GERD):** This is the most common cause of distal esophageal ulcers [2]. Chronic exposure to gastric acid and pepsin leads to mucosal erosion, typically just above the gastroesophageal junction. **NEET-PG High-Yield Pearls:** 1. **Zenker’s Diverticulum:** Presents with halitosis, regurgitation of undigested food, and a neck mass that "gurgles." It is a *false* diverticulum (only mucosa and submucosa herniate) [1]. 2. **Drug-Induced Esophagitis:** Often occurs at the level of the **arch of the aorta** (mid-esophagus) due to anatomical narrowing. Common culprits: Tetracyclines, NSAIDs, and Bisphosphonates. 3. **Cytomegalovirus (CMV):** Unlike the "punched-out" ulcers of HSV, CMV typically causes **large, solitary, linear ulcers** in the distal esophagus, especially in immunocompromised patients.

Q: Which of the following is NOT a treatment for hepatic encephalopathy?

High protein diet. Explanation: Hepatic Encephalopathy (HE) is a reversible neuropsychiatric syndrome caused by liver failure and portosystemic shunting [1]. The primary pathophysiology involves the accumulation of neurotoxic substances, most notably ammonia ($NH_3$), which crosses the blood-brain barrier [1]. Why Option A is the correct answer: Ammonia is a byproduct of protein metabolism by intestinal bacteria [1]. Historically, protein restriction was practiced; however, modern guidelines emphasize that high protein intake (1.2–1.5 g/kg/day) is essential to prevent muscle wasting (sarcopenia), which actually worsens HE because muscle helps detoxify ammonia [2]. Therefore, a "high protein diet" is a nutritional requirement, but protein restriction (not high protein) was the traditional (though now largely obsolete) "treatment" logic. In the context of this question, a high protein diet does not treat an acute episode; rather, it is the management of the underlying nutritional state. Why the other options are incorrect: * Lactulose (Option B): The first-line treatment. It is a non-absorbable disaccharide that acidifies the colon, converting $NH_3$ to non-absorbable $NH_4^+$ (ammonia trapping) and acts as an osmotic laxative. * Oral Neomycin (Option C): An antibiotic that reduces ammonia-producing bacteria in the gut. (Rifaximin is now preferred due to lower toxicity). * Enema (Option D): Used to rapidly clear the bowel of nitrogenous waste and blood (a common precipitant), reducing ammonia absorption. NEET-PG High-Yield Pearls: * Drug of Choice: Lactulose (for acute and maintenance). * Best Add-on Therapy: Rifaximin (reduces recurrence). * Most common precipitant: Infections (SBP), GI bleed, dehydration, or constipation. * Flumazenil: May be used transiently if benzodiazepine overdose is suspected as a trigger.

Q: Adequacy of D-penicillamine treatment in Wilson's disease is monitored by measuring which of the following?

24-hour urinary copper. ### Explanation **Correct Option: A (24-hour urinary copper)** D-penicillamine is a chelating agent that works by increasing the urinary excretion of copper. To monitor the **adequacy and compliance** of treatment, 24-hour urinary copper excretion is the gold standard. * **Initial Phase:** During the start of therapy, urinary copper levels are very high (>1000 µg/day). * **Maintenance Phase:** The goal is to maintain urinary copper excretion between **200–500 µg/day**. Levels below this range suggest non-compliance or under-dosage, while levels significantly higher may indicate the need for dose adjustment. **Why other options are incorrect:** * **B. Serum Ceruloplasmin:** This is a diagnostic marker (usually <20 mg/dL in Wilson's), but it does not change significantly with treatment and is not used for monitoring adequacy. [2] * **C. Disappearance of Kayser-Fleischer (KF) rings:** While KF rings may regress or disappear with successful treatment, this is a slow, subjective clinical finding and not a precise biochemical measure for titrating drug dosage. * **D. Serum copper level:** Total serum copper is usually low in Wilson's disease. While "Free Serum Copper" (Non-ceruloplasmin bound copper) is used to monitor therapy (target <10 µg/dL), total serum copper in a fasting state is not the standard monitoring tool. [1] **High-Yield Clinical Pearls for NEET-PG:** * **Drug of Choice:** D-Penicillamine is the first-line chelator, but **Trientine** is preferred if the patient is intolerant or has neurological worsening. * **Mechanism:** D-penicillamine inhibits pyridoxine; hence, **Vitamin B6 supplementation** is mandatory. * **Monitoring Toxicity:** D-penicillamine can cause nephrotic syndrome and bone marrow suppression; regular **urinalysis and CBC** are required. * **Triad of Wilson's:** Liver disease, Neurological symptoms (Basal ganglia involvement), and KF rings (Descemet's membrane). [1]

Q: Very high serum transaminases (ALT/AST > 1000 IU/L) are seen in the following conditions except?

Alcoholic liver disease. In clinical practice, serum transaminase levels (AST and ALT) exceeding **1000 IU/L** indicate acute, massive hepatocellular necrosis [1]. **1. Why Alcoholic Liver Disease (ALD) is the correct answer:** In ALD, transaminases are typically only mildly to moderately elevated (usually ** 2:1**. **2. Why the other options are incorrect:** * **Viral Hepatitis:** Acute infection with hepatotropic viruses (A, B, or E) commonly causes "flaming" hepatitis with transaminases often reaching 1000–3000+ IU/L [1]. * **Ischemic Liver Injury ("Shock Liver"):** Rapid, massive elevation of AST/ALT (often >5000 IU/L) occurs due to hypoperfusion. A hallmark is the rapid rise followed by a rapid fall (within 48–72 hours) once perfusion is restored. * **Toxin-induced Liver Injury:** Acetaminophen (Paracetamol) toxicity is the most common cause of extremely high transaminases, sometimes exceeding 10,000 IU/L [1]. **Clinical Pearls for NEET-PG:** * **Highest elevations (>5000 IU/L):** Usually seen in Ischemic hepatitis or Acetaminophen toxicity [1]. * **AST > ALT:** Seen in Alcoholic liver disease, Cirrhosis, and Ischemic hepatitis. * **ALT > AST:** Seen in most cases of Acute Viral Hepatitis and NAFLD. * **Biliary Obstruction:** Acute common bile duct stones can cause a transient "spike" in transaminases (>1000) before bilirubin rises, but they settle quickly.

Q: A 50-year-old male executive presents to the casualty with hypotension and hematemesis. There is a history of daily alcohol intake of 100 ml. The estimated blood loss is around 2 litres. What is the most probable diagnosis?

Duodenal ulcer. ### Explanation The correct diagnosis is **Duodenal Ulcer (DU)**. **1. Why Duodenal Ulcer is correct:** In any patient presenting with massive upper gastrointestinal bleeding (UGIB), **Peptic Ulcer Disease (PUD)** is statistically the most common cause worldwide [1]. This patient has lost approximately 2 liters of blood (Class IV Hemorrhage), leading to hypotension [1]. While alcohol is a risk factor for several GI conditions, a massive bleed of this magnitude is most characteristically associated with a posterior duodenal ulcer eroding into the **gastroduodenal artery**. **2. Why other options are incorrect:** * **Gastritis (Option A):** While alcohol causes erosive gastritis, it typically presents with "coffee-ground" emesis or mild hematemesis. It rarely causes massive, life-threatening hemorrhage leading to hypotension. * **Mallory-Weiss Tear (Option C):** This involves a mucosal tear at the gastroesophageal junction, usually following forceful vomiting or retching. While it causes hematemesis, the bleeding is typically self-limiting and rarely results in a 2-liter blood loss. * **Esophageal Varices (Option D):** Although the patient consumes alcohol, there are no mentioned signs of chronic liver disease (stigmata like jaundice, ascites, or splenomegaly) [1]. Statistically, even in heavy drinkers, PUD remains a more frequent cause of UGIB than varices unless portal hypertension is established [1]. **Clinical Pearls for NEET-PG:** * **Most common cause of UGIB:** Peptic Ulcer Disease (Duodenal > Gastric) [1]. * **Rockall Score & Blatchford Score:** Used to risk-stratify patients with UGIB [1]. * **Management Priority:** Hemodynamic stabilization (IV fluids/blood) takes precedence over diagnostic endoscopy. * **Vessel involved in DU bleed:** Gastroduodenal artery (posterior ulcers). * **Vessel involved in GU bleed:** Left gastric artery (lesser curvature ulcers).

Question 1

All of the following are classification systems of portal hypertensive gastropathy, EXCEPT:

Accepted Answer

Los Angeles

Answer

McCormack

Answer

Tanoue

Answer

NIEC = New Italian Endoscopic Club

Question 2

Which of the following would be least likely to cause an ulcer in the distal esophagus?

Accepted Answer

Zenker's diverticulum

Answer

HSV

Answer

Achalasia cardia

Answer

Severe reflux esophagitis

Question 3

A 23-year-old man has noted a yellow color to his sclerae for the past 2 weeks. On physical examination, he has generalized jaundice. He has the physique of a bodybuilder. Laboratory studies show serum total bilirubin, 5.6 mg/dL; ALT, 117 U/L; AST, 103 U/L; alkaline phosphatase, 148 U/L; albumin, 5.5 g/dL; and total protein, 7.9 g/dL. Which of the following substances is he most likely to be using?

Accepted Answer

Anabolic steroid

Answer

Acetaminophen

Answer

Chlorpromazine

Answer

Ethyl alcohol

Question 4

Which of the following is NOT a treatment for hepatic encephalopathy?

Accepted Answer

High protein diet

Answer

Lactulose

Answer

Oral neomycin

Answer

Enema

Question 5

Adequacy of D-penicillamine treatment in Wilson's disease is monitored by measuring which of the following?

Accepted Answer

24-hour urinary copper

Answer

Serum ceruloplasmin

Answer

Disappearance of Kayser-Fleischer rings

Answer

Serum copper level in the fasting state

Question 6

Toxic megacolon is seen in:

Accepted Answer

Ulcerative colitis

Answer

Carcinoma of the colon

Answer

Gastrocolic fistula

Answer

Amoebic colitis

Question 7

A 40-year-old lady presents with an Alkaline Phosphatase (ALP) of 550 U/L, SGOT of 75 U/L, total serum bilirubin of 6.5 mg/dL, and conjugated serum bilirubin of 4.3 mg/dL. What is the most likely diagnosis?

Accepted Answer

Obstructive jaundice

Answer

Dubin-Johnson syndrome

Answer

Viral hepatitis

Answer

Cholelithiasis

Question 8

The triad originally described for Zollinger-Ellison syndrome is characterized by which of the following?

Accepted Answer

Peptic ulceration, gastric hypersecretion, non-beta cell tumor

Answer

Peptic ulceration, gastric hypersecretion, beta cell tumor

Answer

Peptic ulceration, achlorhydria, non-beta cell tumor

Answer

None of the above

Question 9

Very high serum transaminases (ALT/AST > 1000 IU/L) are seen in the following conditions except?

Accepted Answer

Alcoholic liver disease

Answer

Viral hepatitis

Answer

Ischemic liver injury

Answer

Toxin-induced liver injury

Question 10

A 50-year-old male executive presents to the casualty with hypotension and hematemesis. There is a history of daily alcohol intake of 100 ml. The estimated blood loss is around 2 litres. What is the most probable diagnosis?

Accepted Answer

Duodenal ulcer

Answer

Gastritis

Answer

Mallory-Weiss tear

Answer

Esophageal varices

Gastroenterology — MCQs

Gastroenterology — MCQs

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