Gastroenterology Practice Questions

Q: Which of the following conditions is characterized by indirect hyperbilirubinemia?

Gilbert syndrome. The classification of jaundice depends on whether the elevation is in **unconjugated (indirect)** or **conjugated (direct)** bilirubin. [1] **Correct Answer: C. Gilbert syndrome** Gilbert syndrome is a common, benign autosomal recessive condition characterized by reduced activity of the enzyme **UDP-glucuronosyltransferase (UGT1A1)**. [1] This enzyme is responsible for conjugating bilirubin in the liver. A deficiency leads to impaired conjugation, resulting in isolated **indirect (unconjugated) hyperbilirubinemia**. [1] Jaundice is typically mild and triggered by stress, fasting, or illness. **Incorrect Options:** * **A & B (Dubin-Johnson and Rotor syndromes):** These are hereditary disorders characterized by impaired biliary excretion of bilirubin from the hepatocytes into the bile canaliculi. Therefore, they result in **conjugated (direct) hyperbilirubinemia**. * **D (Gallstone):** This causes obstructive (post-hepatic) jaundice. [2] Since the bilirubin has already been processed by the liver, the obstruction leads to a backup of **conjugated (direct) bilirubin** into the bloodstream. [2] **High-Yield Clinical Pearls for NEET-PG:** * **Crigler-Najjar Syndrome:** Also causes indirect hyperbilirubinemia. Type I is a total absence of UGT1A1 (severe, kernicterus), while Type II (Arias syndrome) is a partial deficiency. [1] * **Dubin-Johnson vs. Rotor:** Dubin-Johnson is associated with a **black liver** (due to melanin-like pigment) and normal urinary coproporphyrin levels but an abnormal ratio (80% Coproporphyrin I). Rotor syndrome does not have a pigmented liver. * **Gilbert Syndrome Diagnosis:** Usually an incidental finding; liver function tests (ALT, AST, ALP) and biopsy are normal. Reticulocyte count is normal (ruling out hemolysis).

Q: Which is the most important complication of celiac sprue?

Intestinal neoplasm. The most serious and life-threatening complication of long-standing Celiac disease (especially in patients non-compliant with a gluten-free diet) is the development of malignancies [1]. The most characteristic neoplasm is **Enteropathy-Associated T-cell Lymphoma (EATL)**, which typically involves the proximal small bowel [1]. Other associated malignancies include small bowel adenocarcinoma and squamous cell carcinoma of the esophagus. The risk is significantly higher in patients with "Refractory Celiac Disease." **2. Analysis of Incorrect Options:** * **B. Diabetes Mellitus:** Type 1 Diabetes is an **associated autoimmune condition** (sharing the HLA-DQ2/DQ8 linkage) rather than a complication caused by Celiac disease itself. * **C. Dermatitis Herpetiformis:** This is the **cutaneous manifestation** of Celiac disease, characterized by pruritic vesicles on extensor surfaces. It is considered part of the disease spectrum, not a complication. * **D. Bile Acid Diarrhea:** While malabsorption occurs in Celiac disease, bile acid diarrhea is more typically a complication of terminal ileal resection or Crohn’s disease, where bile acid reabsorption is impaired. **3. NEET-PG High-Yield Pearls:** * **Gold Standard Diagnosis:** Small intestinal biopsy showing villous atrophy, crypt hyperplasia, and increased intraepithelial lymphocytes (Marsh Classification) [1]. * **Serology:** Anti-tissue Transglutaminase (anti-tTG) IgA is the screening test of choice. Anti-Endomysial antibody (EMA) is the most specific. * **Genetics:** Strongly associated with **HLA-DQ2** (95%) and **HLA-DQ8** [1]. * **Refractory Disease:** If symptoms persist despite a gluten-free diet, suspect EATL or Ulcerative Jejunoileitis [1].

Q: Eradication of H. pylori has been proved to be beneficial in which of the following conditions except?

Hypertrophic gastritis. The eradication of *Helicobacter pylori* is a cornerstone in the management of several acid-peptic and lymphoproliferative disorders [1]. However, it has no proven therapeutic benefit in **Hypertrophic gastritis** (Option D). [2] **1. Why Hypertrophic Gastritis is the Correct Answer:** Hypertrophic gastritis (specifically **Ménétrier's disease**) is characterized by massive overgrowth of mucous cells (foveolar hyperplasia) in the gastric body, leading to large rugal folds and protein-losing enteropathy. The underlying pathophysiology is linked to the over-expression of **Transforming Growth Factor-alpha (TGF-α)**, not *H. pylori* infection. Therefore, eradication therapy does not reverse the pathology. **2. Analysis of Incorrect Options:** * **Duodenal (A) and Gastric Ulcers (B):** *H. pylori* is the most common cause of peptic ulcer disease (PUD) [1]. Eradication therapy significantly promotes ulcer healing and, more importantly, reduces the rate of recurrence from >70% to <5% [1]. * **Low-grade MALT Lymphoma (C):** This is a high-yield fact. Gastric MALT lymphoma is uniquely dependent on the antigenic stimulation provided by *H. pylori* [1]. In early-stage (low-grade) cases, *H. pylori* eradication alone can lead to complete regression of the tumor in up to 70-80% of patients [1]. **Clinical Pearls for NEET-PG:** * **Definite Indications for Eradication:** PUD (active or healed), MALT lymphoma, and early gastric cancer (post-resection). * **Ménétrier's Disease:** Look for the triad of **large rugal folds**, **hypoalbuminemia** (protein loss), and **achlorhydria**. It is a premalignant condition. * **First-line Treatment:** Standard Triple Therapy (Clarithromycin + Amoxicillin + PPI) for 14 days is the conventional choice, though Bismuth-based Quadruple Therapy is increasingly preferred due to resistance.

Q: An 82-year-old woman with a history of a small hiatus hernia was recently diagnosed with osteoporosis and started on treatment. Three months later, she presents with progressive dysphagia to solids, particularly meat. She has lost 3 kg in weight but retains a good appetite. What is the most likely explanation for her symptoms?

Side effect of bisphosphonate therapy for osteoporosis. **Explanation:** The patient’s presentation is highly suggestive of **pill-induced esophagitis** leading to an **esophageal stricture**, a well-documented complication of oral **bisphosphonates** (e.g., Alendronate). **1. Why the Correct Answer is Right:** Bisphosphonates are notorious for causing direct mucosal irritation. In elderly patients with a **hiatus hernia**, the drug may linger in the esophagus due to impaired clearance or reflux [1]. Chronic chemical irritation leads to inflammation, ulceration, and eventually, the formation of a **benign peptic stricture** [1]. This manifests as progressive dysphagia to solids (like meat) while the appetite remains intact. **2. Why Incorrect Options are Wrong:** * **A. Early esophageal cancer:** While weight loss and dysphagia in an 82-year-old raise suspicion for malignancy, the specific temporal relationship (starting osteoporosis treatment 3 months prior) and the presence of a predisposing factor (hiatus hernia) point more strongly toward a drug-induced complication. * **B. Eosinophilic esophagitis:** This typically presents in younger males with a history of atopy (asthma/allergies). While it causes solid-food dysphagia, it is less likely in an 82-year-old female. * **C. Plummer-Vinson syndrome:** This is characterized by the triad of iron-deficiency anemia, glossitis, and esophageal webs. It usually affects middle-aged women and is not associated with bisphosphonate use. **Clinical Pearls for NEET-PG:** * **Prevention:** Patients taking oral bisphosphonates must remain **upright for at least 30–60 minutes** and take the pill with a full glass of water to prevent stasis. * **Common Culprits for Pill Esophagitis:** Bisphosphonates, Tetracyclines (Doxycycline), NSAIDs, and Potassium Chloride. * **Diagnosis:** Upper GI endoscopy is the gold standard to visualize the stricture/ulcer and rule out malignancy [2].

Q: Hepatitis C virus (HCV) infection is associated with which of the following?

Anti-liver kidney microsome (LKM) antibody. ### Explanation **Correct Option: B. Anti-liver kidney microsome (LKM) antibody** Hepatitis C Virus (HCV) infection is frequently associated with various extrahepatic manifestations and immunological abnormalities. Specifically, **Anti-LKM-1 antibodies** (directed against cytochrome P450 2D6) are found in approximately **5–10% of patients with chronic HCV** [1]. The underlying mechanism is thought to be **molecular mimicry**, where the immune system reacts to HCV proteins that share structural similarities with the LKM-1 antigen. This is clinically significant because it can mimic Type 2 Autoimmune Hepatitis (AIH), making it crucial to differentiate between the two before starting interferon therapy, which can exacerbate underlying autoimmunity [1]. **Analysis of Incorrect Options:** * **A. Autoimmune cirrhosis:** While HCV can trigger autoimmune-like features, "Autoimmune cirrhosis" is the end-stage of Autoimmune Hepatitis (AIH). HCV is a viral infection, not an autoimmune disease, though it may coexist with or trigger AIH in genetically susceptible individuals. * **C. Antimitochondrial antibody (AMA):** AMA is the hallmark serological marker for **Primary Biliary Cholangitis (PBC)** [2]. It is highly specific (95%) for PBC and is not typically associated with HCV infection. **High-Yield Clinical Pearls for NEET-PG:** * **LKM-1:** Associated with **Type 2 Autoimmune Hepatitis** and **HCV** [1]. * **LKM-2:** Associated with **Drug-induced hepatitis** (e.g., Ticrynafen). * **LKM-3:** Associated with **Hepatitis D (HDV)**. * **Extrahepatic manifestations of HCV:** Cryoglobulinemia (most common), Membranoproliferative glomerulonephritis (MPGN), Porphyria cutanea tarda, and Lichen planus.

Q: An alcoholic patient presented with heartburn and was diagnosed with esophagitis. What is the MOST common cause of esophagitis?

Esophageal reflux. **Explanation:** The most common cause of esophagitis worldwide, regardless of predisposing habits like alcohol consumption, is **Gastroesophageal Reflux Disease (GERD)** [1]. 1. **Why Esophageal Reflux is Correct:** Reflux esophagitis occurs due to the retrograde flow of gastric acid and pepsin into the esophagus, leading to mucosal injury [1]. While alcohol is a known risk factor because it relaxes the **Lower Esophageal Sphincter (LES)** and has a direct toxic effect on the mucosa, the actual pathological process causing the inflammation in this clinical scenario is the resulting acid reflux. 2. **Why Other Options are Incorrect:** * **Alcohol (A) & Smoking (B):** These are significant *risk factors* or "triggers" rather than the primary cause [2]. They exacerbate esophagitis by decreasing LES pressure and impairing esophageal clearance, but they do not cause esophagitis as frequently as chronic acid reflux does. * **Spicy and Hot Food (C):** These act as dietary irritants that can cause transient "pill-induced" style irritation or worsen existing symptoms (heartburn), but they are rarely the primary underlying cause of chronic esophagitis. **NEET-PG High-Yield Pearls:** * **Most common symptom of GERD:** Heartburn (Pyrosis) [1]. * **Gold Standard Investigation for GERD:** 24-hour ambulatory pH monitoring. * **Most common histological finding in GERD:** Eosinophils and neutrophils in the squamous epithelium, basal cell hyperplasia, and elongation of dermal papillae. * **Complication to watch:** Barrett’s Esophagus (Metaplasia: Squamous to Columnar), which increases the risk of **Adenocarcinoma** [2].

Q: What is a characteristic feature of jejunal diverticula?

Impaired vitamin B12 absorption. ### Explanation **Correct Answer: C. Impaired vitamin B12 absorption** Jejunal diverticula are typically **acquired, false diverticula** (consisting only of mucosa and submucosa) that occur on the mesenteric border. The primary clinical significance of multiple jejunal diverticula is their association with **Small Intestinal Bacterial Overgrowth (SIBO)**. The stagnant loop within the diverticula promotes the proliferation of anaerobic bacteria. These bacteria compete with the host for nutrients; specifically, they **deconjugate bile salts** and **consume Vitamin B12** (cyanocobalamin) before it can reach the terminal ileum for absorption. This leads to megaloblastic anemia and malabsorption. **Analysis of Incorrect Options:** * **A & B: Impaired folate and ferritin absorption:** Folate and iron (ferritin) are primarily absorbed in the proximal small intestine (duodenum and proximal jejunum). In SIBO, bacteria actually **synthesize folate**, often leading to *elevated* serum folate levels. Therefore, folate deficiency is not a feature. * **D: Positive urea breath test:** This test is specific for detecting *Helicobacter pylori* infection in the stomach, as *H. pylori* produces urease. It is not used to diagnose jejunal diverticula or SIBO (where Glucose or Lactulose breath tests are preferred). **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Occur on the **mesenteric border** (where vasa recta enter the muscularis). * **Triad of Complications:** Malabsorption (B12 deficiency), Diverticulitis, and Perforation/Obstruction. * **Diagnosis:** Often an incidental finding on CT or Enteroclysis; SIBO is confirmed via **Glucose Hydrogen Breath Test**. * **Treatment:** Asymptomatic cases require no treatment. SIBO is managed with antibiotics (e.g., Rifaximin); surgery is reserved for complications like perforation.

Q: A patient with chronic alcohol abuse is admitted with liver failure. What change associated with liver failure necessitates close monitoring of the patient's blood pressure?

Hypoalbuminemia. **Explanation:** In patients with chronic liver failure (cirrhosis), the liver's synthetic function is severely impaired, leading to **hypoalbuminemia** [1]. Albumin is the primary protein responsible for maintaining **plasma oncotic pressure** [3]. When albumin levels drop, the oncotic pressure within the intravascular compartment decreases, causing fluid to shift from the blood vessels into the interstitial space (third-spacing), resulting in ascites and peripheral edema [1], [3]. This reduction in effective intravascular volume can lead to **hypotension** and circulatory collapse, necessitating close blood pressure monitoring [2]. **Analysis of Incorrect Options:** * **B. Increased capillary permeability:** While seen in sepsis or systemic inflammatory response syndrome (SIRS), it is not the primary pathophysiological mechanism of fluid shift in chronic liver failure. * **C. Abnormal peripheral vasodilation:** While splanchnic and peripheral vasodilation occur in cirrhosis (due to nitric oxide release), the question specifically links the change to a direct consequence of liver synthetic failure [1]. Hypoalbuminemia is the classic hallmark of synthetic failure. * **D. Excess renin release:** In liver failure, the Renin-Angiotensin-Aldosterone System (RAAS) is activated as a *compensatory response* to low effective arterial volume [2]. It is a result of the hemodynamic change, not the primary cause necessitating BP monitoring. **NEET-PG High-Yield Pearls:** * **Serum Albumin:** A key marker of the liver's **synthetic function** (along with PT/INR) [1]. * **Serum-Ascites Albumin Gradient (SAAG):** A SAAG >1.1 g/dL indicates portal hypertension (e.g., Cirrhosis, Budd-Chiari). * **Albumin Infusion:** Used clinically in cirrhosis for Large Volume Paracentesis (>5L) and Spontaneous Bacterial Peritonitis (SBP) to prevent post-paracentesis circulatory dysfunction and hepatorenal syndrome [2].

Question 1

Which of the following conditions is characterized by indirect hyperbilirubinemia?

Accepted Answer

Gilbert syndrome

Answer

Dubin-Johnson syndrome

Answer

Rotor syndrome

Answer

Gallstone

Question 2

Which is the most important complication of celiac sprue?

Accepted Answer

Intestinal neoplasm

Answer

Diabetes mellitus

Answer

Dermatitis herpetiformis

Answer

Bile acid diarrhea

Question 3

Eradication of H. pylori has been proved to be beneficial in which of the following conditions except?

Accepted Answer

Hypertrophic gastritis

Answer

Duodenal ulcer

Answer

Gastric ulcer

Answer

Low grade MALT lymphoma

Question 4

An 82-year-old woman with a history of a small hiatus hernia was recently diagnosed with osteoporosis and started on treatment. Three months later, she presents with progressive dysphagia to solids, particularly meat. She has lost 3 kg in weight but retains a good appetite. What is the most likely explanation for her symptoms?

Accepted Answer

Side effect of bisphosphonate therapy for osteoporosis

Answer

Early esophageal cancer

Answer

Eosinophilic esophagitis

Answer

Plummer-Vinson syndrome

Question 5

Which of the following statements is true regarding viral hepatitis?

Accepted Answer

Transaminase levels show variable elevation during the prodromal phase.

Answer

Raised transaminase levels correlate well with the extent of hepatic injury.

Answer

Hepatitis A virus (HAV) infection is diagnosed by estimating IgG antibodies.

Answer

Elevation of transaminases is specific for liver injury.

Question 6

Hepatitis C virus (HCV) infection is associated with which of the following?

Accepted Answer

Anti-liver kidney microsome (LKM) antibody

Answer

Autoimmune cirrhosis

Answer

Antimitochondrial antibody

Answer

None of the above

Question 7

Protein losing enteropathy with mucosal erosion is seen in which of the following conditions?

Accepted Answer

Lymphoma

Answer

Coeliac disease

Answer

Menetrier's disease

Answer

Systemic lupus erythematosus

Question 8

An alcoholic patient presented with heartburn and was diagnosed with esophagitis. What is the MOST common cause of esophagitis?

Accepted Answer

Esophageal reflux

Answer

Alcohol

Answer

Smoking

Answer

Spicy and hot food

Question 9

What is a characteristic feature of jejunal diverticula?

Accepted Answer

Impaired vitamin B12 absorption

Answer

Impaired folate absorption

Answer

Impaired ferritin absorption

Answer

Positive urea breath test

Question 10

A patient with chronic alcohol abuse is admitted with liver failure. What change associated with liver failure necessitates close monitoring of the patient's blood pressure?

Accepted Answer

Hypoalbuminemia

Answer

Increased capillary permeability

Answer

Abnormal peripheral vasodilation

Answer

Excess renin release from the kidneys

Gastroenterology — MCQs

Gastroenterology — MCQs

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