Gastroenterology Practice Questions

Q: The MELD score includes all of the following except?

Serum albumin. **Explanation:** The **MELD (Model for End-Stage Liver Disease)** score is a validated scoring system used to predict the 3-month mortality in patients with chronic liver disease and is primarily used for prioritizing organ allocation for liver transplantation [1]. **Why Serum Albumin is the correct answer:** Serum albumin is **not** a component of the MELD score. While albumin is a marker of the liver's synthetic function and is included in the **Child-Pugh Score**, it was excluded from the MELD calculation because its levels can be easily influenced by external factors such as intravenous albumin infusion or nutritional status [2]. **Analysis of other options:** The original MELD score is calculated using a logarithmic formula involving three objective laboratory variables: * **Serum Bilirubin (Option A):** Reflects the liver's excretory function. * **Serum Creatinine (Option B):** Reflects renal function, which is a critical prognostic indicator in end-stage liver disease (e.g., Hepatorenal Syndrome) [1]. * **INR / Prothrombin Time (Option C):** Reflects the liver's synthetic function (specifically coagulation factors) [3]. Note: The formula specifically uses **INR**, which is derived from Prothrombin Time. **High-Yield Clinical Pearls for NEET-PG:** 1. **MELD-Na:** The modern version of the score now includes **Serum Sodium**, as hyponatremia is a strong independent predictor of mortality in cirrhotic patients. 2. **MELD vs. Child-Pugh:** Remember the mnemonic **"ABCDE"** for Child-Pugh: **A**lbumin, **B**ilirubin, **C**oagulation (INR), **D**egree of Ascites, and **E**ncephalopathy. 3. **Range:** MELD scores range from **6 to 40**; a higher score indicates a higher risk of death. 4. **PELD Score:** Used for children under 12 years; it includes Albumin and Growth Failure instead of Creatinine.

Q: An 18-year-old male presents with massive hematemesis. He has a history of fever for the past 14 days, for which he was managed with drugs. Moderate splenomegaly is present. What is the most likely diagnosis?

Esophageal varices. ### Explanation The clinical presentation of massive hematemesis in an 18-year-old with a recent history of fever and moderate splenomegaly strongly suggests **Extrahepatic Portal Venous Obstruction (EHPVO)** leading to **Esophageal Varices** [1]. **Why Esophageal Varices is correct:** In the Indian subcontinent, EHPVO is a common cause of portal hypertension in children and young adults. The "fever for 14 days" likely indicates an infection (such as enteric fever or umbilical sepsis in neonatal history) that can trigger **portal vein thrombosis**. The presence of **moderate splenomegaly** is a hallmark of portal hypertension [3]. In these patients, liver function is usually preserved, but the high pressure in the portal system leads to the formation of large esophageal varices, which can rupture and cause life-threatening, massive hematemesis [2]. **Why other options are incorrect:** * **NSAID-induced duodenal ulcer & Drug-induced gastritis:** While these can cause hematemesis after drug intake (e.g., for fever), they **do not explain the splenomegaly**. Splenomegaly is a specific sign of portal hypertension or hematological disorders, not simple peptic ulcer disease or gastritis [3]. Furthermore, bleeding from gastritis is usually "coffee-ground" or minor, rather than "massive." **High-Yield Clinical Pearls for NEET-PG:** * **EHPVO:** Most common cause of massive upper GI bleed in children/young adults in India. * **Key Triad:** Massive hematemesis + Splenomegaly + Normal Liver Function Tests (LFTs) [3]. * **Investigation of Choice:** Color Doppler Ultrasound of the portal system (shows "cavernoma" formation). * **Management:** Endoscopic Variceal Ligation (EVL) is the acute treatment; Proximal Splenorenal Shunt (PSRS) is the definitive surgical treatment.

Q: Which vesiculobullous disease is associated with enteropathy?

Dermatitis herpetiformis. **Explanation:** **Dermatitis Herpetiformis (DH)** is the correct answer because it is considered the cutaneous manifestation of **Celiac disease (Gluten-sensitive enteropathy)**. 1. **Mechanism:** DH is an autoimmune blistering disease characterized by IgA deposits in the dermal papillae. It shares the same genetic predisposition (HLA-DQ2 and HLA-DQ8) and triggers (gluten) as Celiac disease. Nearly 90% of patients with DH have evidence of gluten-sensitive enteropathy on intestinal biopsy, although many remain asymptomatic (silent enteropathy). 2. **Clinical Presentation:** Patients present with intensely pruritic, symmetric, grouped vesicles (herpetiform) on extensor surfaces (elbows, knees, buttocks). **Analysis of Incorrect Options:** * **Pemphigus (A):** This is an intraepidermal blistering disease caused by IgG antibodies against desmogleins [1]. It is associated with other autoimmune conditions (like Myasthenia Gravis) but not enteropathy [1]. * **Linear IgA Dermatosis (B):** Characterized by linear IgA deposits along the basement membrane zone. While it can be drug-induced (Vancomycin), it lacks a specific association with gluten-sensitive enteropathy. * **Chronic Bullous Disease of Childhood (C):** This is essentially the childhood variant of Linear IgA dermatosis. It presents with "string of beads" lesions but is not linked to malabsorption or enteropathy. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Diagnosis:** Direct Immunofluorescence (DIF) showing **granular IgA deposits** at the tips of dermal papillae [2]. * **Histopathology:** Subepidermal blister with **neutrophilic microabscesses** (Papillary tips). * **Treatment of Choice:** **Dapsone** (provides rapid relief of itch) + **Gluten-free diet** (essential for long-term management and reducing the risk of GI lymphoma). * **Serology:** Anti-tissue transglutaminase (tTG) and Anti-endomysial antibodies are often positive.

Q: Non-absorption of fat-soluble vitamins is primarily due to which of the following conditions?

Steatorrhea. **Explanation:** The absorption of fat-soluble vitamins (A, D, E, and K) is intrinsically linked to the digestion and absorption of dietary lipids [1]. **1. Why Steatorrhea is the correct answer:** Steatorrhea refers to the presence of excess fat in the feces, resulting from fat maldigestion or malabsorption [3]. Fat-soluble vitamins require bile salts for micelle formation and pancreatic lipase for breakdown [2]. When these processes are disrupted (e.g., in chronic pancreatitis, celiac disease, or biliary obstruction), fats are not absorbed and remain in the intestinal lumen [4]. Because vitamins A, D, E, and K are dissolved within these fats, they are excreted along with the unabsorbed lipids, leading to deficiency [4]. **2. Why the other options are incorrect:** * **Pancreatic endocrine insufficiency:** This refers to the failure of the Islets of Langerhans to produce hormones like insulin and glucagon, leading to Diabetes Mellitus. It does not affect the secretion of digestive enzymes (exocrine function) and therefore does not cause malabsorption or steatorrhea [3]. * **Option C and D:** Since endocrine insufficiency is unrelated to fat absorption, these options are logically incorrect. **NEET-PG High-Yield Pearls:** * **Clinical Sign:** Steatorrhea is typically characterized by bulky, foul-smelling, oily stools that are difficult to flush. * **Vitamin K Deficiency:** Often the first fat-soluble vitamin deficiency to manifest clinically, presenting as an increased Prothrombin Time (PT/INR) and bleeding tendencies. * **Vitamin D Deficiency:** Leads to osteomalacia in adults and rickets in children. * **Diagnostic Gold Standard:** The 72-hour fecal fat estimation (>7g/day is abnormal) is the gold standard for diagnosing steatorrhea. * **Screening Test:** Sudan III stain of a spot stool sample.

Q: Which of the following conditions is associated with osmotic diarrhea?

Lactase deficiency. **Explanation:** **Lactase deficiency** is a classic cause of **osmotic diarrhea** [1]. In this condition, the inability to digest lactose leads to its accumulation in the intestinal lumen [2]. These undigested sugars are osmotically active, drawing water into the gut. Furthermore, colonic bacteria ferment the lactose into short-chain fatty acids and gas, further increasing the osmotic load and causing flatulence and bloating [1], [2]. A key diagnostic feature of osmotic diarrhea is that it **improves with fasting** and presents with an **increased osmotic gap** (>125 mOsm/kg). **Analysis of Incorrect Options:** * **Ulcerative sprue:** This is a complication of Celiac disease characterized by chronic inflammation and ulceration. It primarily causes **malabsorptive diarrhea** due to the loss of mucosal surface area. * **Surreptitious ingestion of laxatives:** While some laxatives (like magnesium) cause osmotic diarrhea, "surreptitious use" in medical exams often refers to stimulant laxatives (like bisacodyl or senna), which cause **secretory diarrhea**. * **Endocrine tumors:** Conditions like VIPoma (Verner-Morrison syndrome) or Carcinoid syndrome produce hormones that stimulate active ion secretion into the gut, leading to profuse **secretory diarrhea** that does not stop with fasting. **High-Yield NEET-PG Pearls:** * **Stool Osmotic Gap Formula:** $290 - 2 \times (\text{Stool } Na^+ + \text{Stool } K^+)$. * **Osmotic Gap >125 mOsm/kg:** Suggests Osmotic diarrhea (e.g., Lactase deficiency, Magnesium ingestion). * **Osmotic Gap <50 mOsm/kg:** Suggests Secretory diarrhea (e.g., Cholera, VIPoma). * **Clinical Clue:** If the diarrhea stops when the patient stops eating, think **Osmotic**. If it persists during sleep/fasting, think **Secretory**.

Q: Prophylaxis against spontaneous bacterial peritonitis (SBP) in patients with cirrhosis and ascites is indicated in which of the following situations?

Patients with a prior history of SBP. The primary indication for long-term prophylaxis against Spontaneous Bacterial Peritonitis (SBP) is secondary prevention. Patients who have survived an initial episode of SBP have a recurrence rate of approximately 70% within one year. Therefore, lifelong administration of oral antibiotics (typically Norfloxacin 400 mg/day or Trimethoprim-sulfamethoxazole) is mandatory to reduce mortality and recurrence. Analysis of Incorrect Options: A. High-protein ascites: Low-protein ascites is actually the risk factor for SBP. High protein levels provide better opsonic activity and are protective. C. Serum creatinine of 1 mg/dl: Normal renal function does not necessitate prophylaxis. Primary prophylaxis is indicated only if there is renal impairment combined with low ascitic protein. D. Child-Pugh score less than 8: Prophylaxis is considered in advanced liver disease.

Question 1

The MELD score includes all of the following except?

Accepted Answer

Serum albumin

Answer

Serum bilirubin

Answer

Serum creatinine

Answer

Prothrombin time

Question 2

Diffuse specific lesions on intestinal biopsy are seen in:

Accepted Answer

Whipple's disease

Answer

Celiac sprue

Answer

Agammaglobulinemia

Answer

Abetalipoproteinemia

Question 3

Which of the following is NOT a characteristic feature of Crohn's disease?

Accepted Answer

Anti- Saccharomyces cerevisiae antibodies (ASCA) are typically negative.

Answer

Infertility can be associated with Crohn's disease.

Answer

There is an increased risk of developing certain cancers.

Answer

Medical treatment may involve antibiotics, probiotics, and TNF-alpha blockers.

Question 4

An 18-year-old male presents with massive hematemesis. He has a history of fever for the past 14 days, for which he was managed with drugs. Moderate splenomegaly is present. What is the most likely diagnosis?

Accepted Answer

Esophageal varices

Answer

NSAID-induced duodenal ulcer

Answer

Drug-induced gastritis

Answer

None of the above

Question 5

Which vesiculobullous disease is associated with enteropathy?

Accepted Answer

Dermatitis herpetiformis

Answer

Pemphigus

Answer

Linear IgA dermatosis

Answer

Chronic bullous disease of childhood

Question 6

Non-absorption of fat-soluble vitamins is primarily due to which of the following conditions?

Accepted Answer

Steatorrhea

Answer

Pancreatic endocrine insufficiency

Answer

Both steatorrhea and pancreatic endocrine insufficiency

Answer

Neither steatorrhea nor pancreatic endocrine insufficiency

Question 7

Which of the following conditions is associated with osmotic diarrhea?

Accepted Answer

Lactase deficiency

Answer

Ulcerative sprue

Answer

Surreptitious ingestion of laxatives

Answer

Endocrine tumors

Question 8

Leukocytoclastic vasculitis is noticed as an extrahepatic manifestation in which of the following conditions?

Accepted Answer

Chronic hepatitis B

Answer

Chronic Hepatitis C

Answer

Autoimmune hepatitis

Answer

Wilson's disease

Question 9

Prophylaxis against spontaneous bacterial peritonitis (SBP) in patients with cirrhosis and ascites is indicated in which of the following situations?

Accepted Answer

Patients with a prior history of SBP

Answer

Patients with high-protein ascites

Answer

Patients with serum creatinine of 1 mg/dl

Answer

Patients with Child-Pugh score less than 8

Question 10

All are important mechanisms in the formation of lithogenic bile EXCEPT?

Accepted Answer

Low calorie and cholesterol-rich diet

Answer

Increased biliary secretion of cholesterol

Answer

Increased activity of HMG CoA reductase

Answer

Clofibrate administration

Gastroenterology — MCQs

Gastroenterology — MCQs

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