Gastroenterology Practice Questions

Q: A 19-year-old man presents with a long history of weight loss, abdominal distention, bloating, and diarrhea. Investigations reveal steatorrhea, and a small bowel biopsy shows blunting and flattening of villi. What is the most likely diagnosis?

Celiac disease. The clinical presentation of chronic diarrhea, weight loss, and steatorrhea in a young adult, combined with the classic histopathological finding of **villous atrophy (blunting and flattening of villi)**, is hallmark for **Celiac Disease**. [1] **1. Why Celiac Disease is correct:** Celiac disease is an immune-mediated enteropathy triggered by gluten ingestion in genetically predisposed individuals (HLA-DQ2/DQ8). The immune response causes mucosal inflammation leading to: * **Villous atrophy:** Loss of absorptive surface area. [1] * **Crypt hyperplasia:** Increased cell turnover. [1] * **Intraepithelial lymphocytosis:** Increased CD8+ T cells. This malabsorption results in steatorrhea (fatty stools) and nutritional deficiencies. [3] **2. Why other options are incorrect:** * **Gastrinoma (Zollinger-Ellison Syndrome):** While it can cause diarrhea due to intestinal acidification inactivating pancreatic enzymes, it typically presents with refractory peptic ulcers and would not show villous flattening on biopsy. * **Hyperthyroidism:** Causes increased frequency of bowel movements (hypermotility) rather than true malabsorptive steatorrhea or structural villous damage. * **Associated with skin pigmentation (Whipple’s Disease):** Whipple’s disease presents with malabsorption and hyperpigmentation [2], but the biopsy would show **PAS-positive macrophages** and dilated lacteals, not isolated villous flattening [2]. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Diagnosis:** Small bowel biopsy (D2/distal duodenum). * **Serology:** Anti-tissue Transglutaminase (tTG) IgA is the best screening test; Anti-Endomysial Antibody (EMA) is the most specific. * **Associated Condition:** Dermatitis Herpetiformis (itchy, vesicular skin rash). * **Complications:** Increased risk of Enteropathy-associated T-cell lymphoma (EATL) and small bowel adenocarcinoma.

Q: Sudden hematemesis in a patient with a history of alcohol use and a mucosal tear is characteristic of which condition?

Mallory-Weiss syndrome. **Mallory-Weiss Syndrome (MWS)** is the correct answer. It is characterized by a **longitudinal mucosal laceration** (tear) at the gastroesophageal junction or distal esophagus. The classic presentation involves a patient with a history of forceful vomiting, retching, or coughing (often following **alcohol binge**) which leads to a sudden increase in intra-abdominal pressure. This pressure causes the mucosa to tear, resulting in painless hematemesis. **Analysis of Incorrect Options:** * **Dieulafoy's Lesion:** This involves a large, tortuous **submucosal artery** that erodes the overlying epithelium. It causes massive, intermittent GI bleeding but is not associated with mucosal tears or forceful retching. * **Boerhaave Syndrome:** This is a **full-thickness transmural perforation** of the esophagus, usually following forceful vomiting. Unlike MWS, it presents with excruciating chest pain, subcutaneous emphysema, and shock (Mackler’s Triad) rather than simple hematemesis. * **Dysphagia Lusoria:** This is a structural cause of dysphagia caused by an **aberrant right subclavian artery** compressing the esophagus [1]. It does not present with hematemesis or mucosal tears. **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Most commonly located just below the Z-line (gastric side of the GE junction). * **Diagnosis:** Gold standard is **Upper GI Endoscopy (UGIE)**, which shows linear mucosal tears [1]. * **Management:** Most cases (approx. 80-90%) stop bleeding spontaneously. Active bleeding is managed endoscopically with epinephrine injection, clipping, or thermal coagulation. * **Risk Factors:** Alcoholism is the strongest association; also seen in hyperemesis gravidarum and eating disorders.

Q: A 45-year-old man with a long history of alcohol intake presents with upper gastrointestinal bleeding. Urgent upper GI endoscopy reveals dilated, tortuous, bluish submucosal veins in the lower esophagus. What is the most likely diagnosis?

Esophageal varices. ***Esophageal varices*** - Chronic alcohol intake leads to **alcoholic cirrhosis** → **portal hypertension** → development of **esophageal varices** as portosystemic collaterals. - Endoscopy reveals **dilated, tortuous veins** in the lower esophagus that are prone to rupture, causing **massive upper GI bleeding**. *Esophageal carcinoma* - Typically presents with **progressive dysphagia** and **weight loss** over months, not acute bleeding. - Endoscopic appearance shows **ulcerative or exophytic masses**, not the dilated venous structures seen in varices. *Foreign body* - Usually presents with **acute onset dysphagia** or **odynophagia** following ingestion of a specific object. - Endoscopy would reveal the **actual foreign object** lodged in the esophagus, not findings suggestive of chronic liver disease. *Tertiary esophageal contractions* - Represents **non-peristaltic, simultaneous contractions** causing chest pain or dysphagia, not bleeding. - This is a **motility disorder** diagnosed by manometry, not associated with upper GI hemorrhage or chronic alcoholism.

Q: Which of the following is NOT a test for malabsorption syndrome?

Urine aminoaciduria. **Explanation:** Malabsorption syndrome refers to the inability of the gastrointestinal tract to absorb nutrients (fats, carbohydrates, proteins, vitamins, and minerals) into the bloodstream. **Why "Urine aminoaciduria" is the correct answer:** Aminoaciduria refers to the presence of amino acids in the urine. This is typically a feature of **renal tubular disorders** (e.g., Fanconi syndrome) or **inborn errors of metabolism** (e.g., Hartnup disease, Cystinuria), rather than a failure of intestinal absorption. While protein malabsorption occurs in the gut, it is diagnosed via fecal alpha-1 antitrypsin levels [1] or serum albumin, not by measuring urinary amino acids. **Analysis of incorrect options:** * **D-Xylose absorption test:** A classic test to differentiate **mucosal disease** (e.g., Celiac disease) from pancreatic insufficiency. Since D-xylose is a monosaccharide absorbed by intact mucosa without needing pancreatic enzymes, low urinary excretion indicates intestinal mucosal damage. * **Fecal fat estimation:** The **Gold Standard** for diagnosing steatorrhea (fat malabsorption) [1]. The 72-hour fecal fat collection (Sudan III stain or Van de Kamer titration) is used to confirm malabsorption. * **Breath Hydrogen test:** Used to diagnose **carbohydrate malabsorption** (e.g., Lactose intolerance) and Small Intestinal Bacterial Overgrowth (SIBO) [2]. Undigested carbohydrates are fermented by colonic bacteria, producing hydrogen gas which is exhaled [2]. **High-Yield Clinical Pearls for NEET-PG:** * **Best Screening Test for Malabsorption:** Sudan III staining of stool. * **Gold Standard for Fat Malabsorption:** 72-hour fecal fat estimation (>7g/day is abnormal). * **D-Xylose Test:** Remains normal in Pancreatic Insufficiency but is abnormal in Celiac Disease. * **Schilling Test:** Historically used for Vitamin B12 malabsorption (now largely replaced by anti-IF antibodies and MMA levels).

Q: Which of the following is an uncommon cause of upper gastrointestinal bleeding?

Carcinoma of the stomach. **Explanation:** Upper Gastrointestinal Bleeding (UGIB) is a common medical emergency [1]. To answer this question, one must distinguish between the **most common** causes and those that are statistically **uncommon**. **Why Option D is Correct:** While **Carcinoma of the stomach** can present with chronic occult blood loss (leading to iron deficiency anemia) or "coffee-ground" emesis, it is an **uncommon cause of acute, massive UGIB**. It accounts for only about 1% to 2% of all UGIB cases. Bleeding in malignancy usually occurs due to surface erosions or friable tumor vascularity rather than the rapid erosion of a major vessel. **Why the Other Options are Incorrect:** * **Peptic Ulcer (Option C):** This is the **most common cause** of UGIB worldwide, accounting for approximately 50% of cases. It includes both gastric and duodenal ulcers. * **Erosive Gastritis (Option B):** Also known as hemorrhagic gastritis, this is a frequent cause of UGIB, often secondary to NSAID use, alcohol consumption, or severe physiological stress (Stress ulcers) [1]. * **Varices (Option A):** Esophageal and gastric varices are common causes of UGIB, particularly in patients with portal hypertension/cirrhosis. While less frequent than peptic ulcers, they are a leading cause of massive, life-threatening hemorrhage. **NEET-PG High-Yield Pearls:** 1. **Most common cause of UGIB:** Peptic Ulcer Disease (specifically Duodenal Ulcers). 2. **Most common cause of Lower GI Bleed:** Diverticulosis (in adults) and Meckel’s Diverticulum (in children). 3. **Dieulafoy’s Lesion:** An uncommon but important cause of massive UGIB caused by a large submucosal artery that erodes through the mucosa. 4. **Rockall Score & Blatchford Score:** Clinical scoring systems used to predict mortality and the need for intervention in UGIB [1].

Q: Characteristic autoantibodies of autoimmune hepatitis include all of the following, except?

ANCA. **Explanation:** Autoimmune Hepatitis (AIH) is a chronic inflammatory liver disease characterized by hypergammaglobulinemia and the presence of specific autoantibodies. The classification of AIH is primarily based on these antibody profiles. **Why ANCA is the correct answer:** While **p-ANCA** (Perinuclear Anti-Neutrophilic Cytoplasmic Antibodies) can sometimes be found in Type 1 AIH, it is **not a characteristic or diagnostic marker** for the disease [1]. p-ANCA is more classically associated with **Primary Sclerosing Cholangitis (PSC)** and Ulcerative Colitis [1]. In the context of this question, the other three options are the defining serological markers used to classify AIH. **Analysis of incorrect options:** * **Antinuclear Antibodies (ANA):** These are the most common markers for **Type 1 AIH** (along with Anti-Smooth Muscle Antibodies/ASMA) [2]. Type 1 is the most common form worldwide, affecting all ages. * **Anti-LKM1 (Liver-Kidney Microsome type 1):** This is the hallmark of **Type 2 AIH**. It typically affects children and adolescents and often follows a more severe clinical course. * **Anti-SLA (Soluble Liver Antigen):** This is highly specific for AIH. It is found in some patients who are negative for ANA and ASMA, sometimes referred to as "Type 3 AIH" (though now usually grouped under Type 1). **NEET-PG High-Yield Pearls:** * **Type 1 AIH:** ANA (+), ASMA (+), Anti-SLA (+). * **Type 2 AIH:** Anti-LKM1 (+), Anti-LC1 (Liver Cytosol type 1) (+). * **Drug of Choice:** Corticosteroids (Prednisolone) alone or in combination with Azathioprine. * **Histology:** Look for **"Interface Hepatitis"** (piecemeal necrosis) and a plasma cell-rich infiltrate.

Q: A patient presents with lower gastrointestinal bleed. Sigmoidoscopy shows ulcers in the sigmoid. Biopsy from this area shows flask-shaped ulcers. Which of the following is the most appropriate treatment?

Intravenous metronidazole. **Explanation:** The clinical presentation of lower gastrointestinal bleeding combined with the pathognomonic finding of **flask-shaped ulcers** on biopsy is diagnostic of **Amoebic Colitis**, caused by *Entamoeba histolytica*. [1] 1. **Why Intravenous Metronidazole is correct:** *Entamoeba histolytica* trophozoites secrete proteolytic enzymes (histolysins) that breach the colonic mucosa. Once they reach the submucosa, they spread laterally, creating the characteristic narrow-necked, wide-based "flask-shaped" ulcer. **Metronidazole** (or Tinidazole) is the drug of choice as it is a potent tissue amoebicide that kills the invasive trophozoites. In cases of active GI bleed or severe colitis, the intravenous route is preferred to ensure rapid therapeutic levels. 2. **Why other options are incorrect:** * **Option A:** Ceftriaxone is a third-generation cephalosporin used for bacterial infections (like enteric fever or peritonitis) but has no activity against protozoa like *E. histolytica*. * **Options C & D:** Steroids and Sulphasalazine are used to treat Inflammatory Bowel Disease (IBD), specifically Ulcerative Colitis [2]. Administering steroids in a patient with amoebic colitis is dangerous and contraindicated, as it can lead to toxic megacolon or perforation. **High-Yield Clinical Pearls for NEET-PG:** * **Site:** The most common site for amoebic ulcers is the **Cecum** and ascending colon, but they can involve the sigmoid. * **Microscopy:** Look for trophozoites with **ingested RBCs** (erythrophagocytosis) in the stool or biopsy. * **Treatment Protocol:** Always follow a tissue amoebicide (Metronidazole) with a **luminal amoebicide** (e.g., Paromomycin or Diloxanide furoate) to eradicate the cyst stage and prevent relapse/transmission. * **Complication:** The most common extra-intestinal site is the liver (**Amoebic Liver Abscess**), typically presenting with "anchovy sauce" pus [1].

Q: Budd-chiari syndrome is most commonly due to:

Hepatic vein obstruction. **Explanation:** **Budd-Chiari Syndrome (BCS)** is defined as an obstruction to the hepatic venous outflow at any level from the small hepatic veins to the junction of the inferior vena cava (IVC) with the right atrium. **1. Why Option A is correct:** The hallmark of BCS is the obstruction of the **hepatic veins** [1]. This leads to increased sinusoidal pressure, causing centrizonal congestion, hepatocyte necrosis, and eventually cirrhosis. While the obstruction can occur in the IVC, the classic and most common site of primary pathology in Western literature (and standard medical definitions) is the hepatic veins. **2. Why the other options are incorrect:** * **Option B & C:** Portal hypertension is a **consequence** of Budd-Chiari syndrome, not its cause. BCS causes post-sinusoidal portal hypertension. Congenital portal hypertension (like Extrahepatic Portal Venous Obstruction) involves the portal vein, not the hepatic outflow tract. * **Option D:** While IVC obstruction (membranous webs) is a common cause of BCS in Asia (especially Nepal and China), globally and in standard textbook definitions, hepatic vein thrombosis remains the primary anatomical site associated with the syndrome [1]. **Clinical Pearls for NEET-PG:** * **Classic Triad:** Abdominal pain, ascites, and hepatomegaly. * **Most common cause:** Hypercoagulable states (Polycythemia Vera is the most common myeloproliferative disorder associated). * **Imaging:** Doppler Ultrasound is the initial investigation of choice (shows "spider-web" collaterals). * **Pathology:** "Nutmeg liver" (congestive hepatopathy) is seen on gross examination [2]. * **Caudate Lobe:** Often undergoes **compensatory hypertrophy** because its venous drainage enters the IVC directly, bypassing the major hepatic veins.

Question 1

A 19-year-old man presents with a long history of weight loss, abdominal distention, bloating, and diarrhea. Investigations reveal steatorrhea, and a small bowel biopsy shows blunting and flattening of villi. What is the most likely diagnosis?

Accepted Answer

Celiac disease

Answer

Gastrinoma

Answer

Hyperthyroidism

Answer

Associated with skin pigmentation

Question 2

Sudden hematemesis in a patient with a history of alcohol use and a mucosal tear is characteristic of which condition?

Accepted Answer

Mallory-Weiss syndrome

Answer

Dieulafoy's lesion

Answer

Boerhaave syndrome

Answer

Dysphagia lusoria

Question 3

A 45-year-old man with a long history of alcohol intake presents with upper gastrointestinal bleeding. Urgent upper GI endoscopy reveals dilated, tortuous, bluish submucosal veins in the lower esophagus. What is the most likely diagnosis?

Accepted Answer

Esophageal varices

Answer

Esophageal carcinoma

Answer

Foreign body

Answer

Tertiary esophageal contractions

Question 4

Which of the following is NOT a test for malabsorption syndrome?

Accepted Answer

Urine aminoaciduria

Answer

D-Xylose absorption test

Answer

Fecal fat estimation

Answer

Breath Hydrogen test

Question 5

Ulcerative colitis and Crohn's disease are associated with all of the following conditions EXCEPT?

Accepted Answer

Glycogen storage diseases Type III

Answer

Wiskott Aldrich Syndrome

Answer

Turner's syndrome

Answer

Hermansky Pudlak Syndrome

Question 6

Which of the following is an uncommon cause of upper gastrointestinal bleeding?

Accepted Answer

Carcinoma of the stomach

Answer

Varices

Answer

Erosive gastritis

Answer

Peptic ulcer

Question 7

Characteristic autoantibodies of autoimmune hepatitis include all of the following, except?

Accepted Answer

ANCA

Answer

Antinuclear Antibodies (ANA)

Answer

Anti-SLA

Answer

Anti-LKM1

Question 8

A patient presents with lower gastrointestinal bleed. Sigmoidoscopy shows ulcers in the sigmoid. Biopsy from this area shows flask-shaped ulcers. Which of the following is the most appropriate treatment?

Accepted Answer

Intravenous metronidazole

Answer

Intravenous ceftriaxone

Answer

Intravenous steroids and sulphasalazine

Answer

Hydrocortisone enemas

Question 9

Eradication of Helicobacter pylori has been proved to be beneficial in which of the following disorders of the stomach?

Accepted Answer

Low grade Malt lymphoma

Answer

Erosive gastritis

Answer

Carcinoma stomach

Answer

Gastroesophageal disease

Question 10

Budd-chiari syndrome is most commonly due to:

Accepted Answer

Hepatic vein obstruction

Answer

Acute portal hypertension

Answer

Congenital portal hypertension

Answer

IVC obstruction

Gastroenterology — MCQs

Gastroenterology — MCQs

On this page

Practice by Chapter

Want unlimited practice?