Gastroenterology Practice Questions

Q: Which of the following are types of inflammatory bowel disease?

Crohn's disease. **Explanation:** Inflammatory Bowel Disease (IBD) refers to a group of chronic, idiopathic, immune-mediated inflammatory disorders of the gastrointestinal tract. The two primary clinical entities under this umbrella are **Crohn’s disease** and **Ulcerative colitis** [1]. 1. **Crohn’s Disease (Correct):** This is a classic type of IBD characterized by transmural inflammation that can affect any part of the GI tract (from mouth to anus), most commonly the terminal ileum. Key features include "skip lesions," non-caseating granulomas, and complications like fistulas and strictures [1]. 2. **Ulcerative Colitis (Incorrect in context):** While Ulcerative Colitis is indeed a type of IBD, in a single-best-answer format where only one option is marked correct, Crohn’s disease is the representative choice [1]. (Note: In many exams, both A and B are considered IBD; however, if forced to choose or if the question implies a specific characteristic not listed, Crohn’s is the prototypical granulomatous IBD). 3. **Toxic Colitis (Incorrect):** This is a clinical *complication* (often leading to toxic megacolon) rather than a distinct disease category. It can be triggered by severe IBD or infectious colitis. 4. **Amoebic Colitis (Incorrect):** This is an *infectious* colitis caused by the protozoan *Entamoeba histolytica*. Unlike IBD, it is not idiopathic or autoimmune and is treated with antiprotozoal medications (e.g., Metronidazole). **High-Yield NEET-PG Pearls:** * **Smoking:** A risk factor for Crohn’s disease but protective against Ulcerative Colitis. * **ASCA vs. pANCA:** Crohn’s is associated with **ASCA** (Anti-Saccharomyces cerevisiae antibodies), while UC is associated with **pANCA**. * **Histology:** Crohn’s shows **transmural** inflammation and **granulomas**; UC is limited to the **mucosa/submucosa** and shows **crypt abscesses** [1].

Q: Intermittent dysphagia is caused by which of the following conditions?

Pharyngeal diverticulum. Dysphagia (difficulty swallowing) is clinically categorized based on its progression and the type of bolus (solids vs. liquids) involved. **1. Why Pharyngeal Diverticulum (Zenker’s Diverticulum) is correct:** A pharyngeal diverticulum is a structural abnormality (pouching) that causes **intermittent dysphagia**. The symptoms occur sporadically depending on whether the diverticulum is empty or filled with food. When filled, it compresses the esophagus, causing dysphagia, regurgitation of undigested food, and halitosis [1]. Because the pouch is not always full, the symptoms are not constant or strictly progressive. The gold standard for investigation is a barium swallow [1]. **2. Why the other options are incorrect:** * **A. Stricture (Esophageal Stricture):** This typically causes **progressive dysphagia**, initially for solids and later for liquids [1]. Once the lumen is narrowed, the obstruction is constant and worsening, not intermittent. * **B. Achalasia Cardia:** This is a motility disorder characterized by **progressive dysphagia** for both solids and liquids simultaneously [1]. While the severity may fluctuate slightly, it is generally a persistent, worsening condition due to the failure of the Lower Esophageal Sphincter (LES) to relax and progressive dilatation of the gullet [1]. **Clinical Pearls for NEET-PG:** * **Intermittent Dysphagia for Solids:** Highly suggestive of **Schatzki ring** or Esophageal Webs. * **Progressive Dysphagia (Solids → Liquids):** Suggests mechanical obstruction (Stricture if long history; Malignancy if short history/weight loss). * **Progressive Dysphagia (Solids + Liquids together):** Suggests a motility disorder (Achalasia Cardia or Diffuse Esophageal Spasm) [2]. * **Zenker’s Diverticulum** occurs at **Killian’s Dehiscence** (between the thyropharyngeus and cricopharyngeus muscles). The gold standard for diagnosis is a **Barium Swallow** [1].

Q: Which drug can cause complete histopathological resolution in patients with hepatitis B?

Entecavir. The primary goal of treating Chronic Hepatitis B (CHB) is to prevent disease progression to cirrhosis and hepatocellular carcinoma. **Entecavir (Option C)** is a potent nucleoside analogue that inhibits HBV DNA polymerase [1]. Long-term therapy with Entecavir (and Tenofovir) not only achieves profound viral suppression and biochemical normalization but has been clinically proven to result in **histological improvement** and **regression of fibrosis/cirrhosis** [1]. Studies (notably by Chang et al.) demonstrated that long-term Entecavir treatment leads to a reduction in the Ishak fibrosis score and can result in near-complete histopathological resolution of necroinflammation. **Why other options are incorrect:** * **Cyclosporin (Option A):** This is an immunosuppressant used in transplants and autoimmune conditions. It does not have antiviral activity against HBV; in fact, immunosuppressants can trigger **HBV reactivation**, leading to fulminant hepatic failure. * **Prednisolone (Option B):** Corticosteroids suppress the immune response. While they might transiently lower transaminases, they increase viral replication. Withdrawal of steroids can cause a "transaminase flare" and does not lead to histopathological resolution of the underlying viral infection. **High-Yield Pearls for NEET-PG:** * **First-line agents for CHB:** Entecavir, Tenofovir (TDF/TAF), and Pegylated Interferon-alpha [2]. * **Entecavir's niche:** It is preferred in patients with renal impairment (over TDF) but has a high failure rate in patients already resistant to Lamivudine (due to shared resistance pathways). * **Histological "Reversal":** HBV is one of the few conditions where established cirrhosis is considered potentially reversible with long-term, effective antiviral therapy. * **Monitoring:** The most sensitive indicator of treatment response is the disappearance of HBV DNA (Viral Load) [3].

Q: All of the following are features of secretory diarrhea, except?

It reduces with fasting. ### Explanation The key to distinguishing types of diarrhea in NEET-PG lies in understanding the pathophysiology of water and electrolyte movement in the gut [1]. **Why "It reduces with fasting" is the correct answer:** Secretory diarrhea is caused by the active secretion of electrolytes (mainly $Cl^-$ or $HCO_3^-$) into the intestinal lumen, which drags water along with it [1]. This process is independent of food intake. Therefore, **secretory diarrhea persists even during fasting.** In contrast, **osmotic diarrhea** (e.g., lactose intolerance) improves or stops with fasting because the unabsorbed solutes that pull water into the lumen are no longer being ingested [2]. **Analysis of Incorrect Options:** * **Option A (Painless):** Secretory diarrhea is typically painless and watery. It lacks the cramping or tenesmus associated with inflammatory or dysenteric diarrhea. * **Option C (Stool volume > 1L/day):** Secretory diarrhea is characterized by high-volume output, often exceeding 1 liter per day (e.g., in Cholera or VIPoma) [1]. * **Option D (Stool osmotic gap is normal):** In secretory diarrhea, the fecal osmolality is accounted for by electrolytes ($Na^+$ and $K^+$). The **Stool Osmotic Gap (SOG)** is calculated as: $290 - 2 \times (Stool\ Na^+ + Stool\ K^+)$. In secretory diarrhea, the SOG is **low/normal ( 125 mOsm/kg). **High-Yield Clinical Pearls for NEET-PG:** 1. **Classic Causes:** Cholera (Vibrio toxin), VIPoma (WDHA syndrome: Watery Diarrhea, Hypokalemia, Achlorhydria), and Carcinoid syndrome [1]. 2. **Stool Osmotic Gap:** * ** 125 mOsm/kg:** Osmotic Diarrhea. 3. **VIPoma (Verner-Morrison Syndrome):** Often presents with massive secretory diarrhea (up to 5L/day) and is a classic "painless" diarrhea scenario.

Q: The Child-Pugh score is used for assessing the severity of which condition?

Chronic liver disease. The **Child-Pugh score** (also known as the Child-Turcotte-Pugh score) is a validated clinical tool used to assess the prognosis and severity of **Chronic Liver Disease (CLD)**, particularly cirrhosis [1]. It helps clinicians predict mortality rates and determine the necessity of liver transplantation. ### Why Option C is Correct: The score evaluates liver function based on five parameters (mnemonic: **ABCDE**): 1. **A**lbumin (Serum levels) [1] 2. **B**ilirubin (Total levels) [1] 3. **C**oagulation (INR/Prothrombin Time) [1] 4. **D**egree of Ascites [2] 5. **E**ncephalopathy (Grade) [2] Patients are categorized into **Class A** (5–6 points; well-compensated), **Class B** (7–9 points; significant functional compromise), or **Class C** (10–15 points; decompensated/severe). ### Why Other Options are Incorrect: * **A. Hepatic Encephalopathy:** While this is a *component* of the Child-Pugh score, the score itself assesses the overall liver status, not just the encephalopathy [2]. Encephalopathy is graded separately using the **West Haven Criteria** [3]. * **B. Uremic Encephalopathy:** This is a complication of renal failure. Renal function is notably **absent** from the Child-Pugh score (it is, however, included in the MELD score) [2]. * **D. Head Injury:** Severity is assessed using the **Glasgow Coma Scale (GCS)**. ### High-Yield Clinical Pearls for NEET-PG: * **MELD Score (Model for End-Stage Liver Disease):** Uses Bilirubin, Creatinine, and INR. It is preferred over Child-Pugh for prioritizing patients on liver transplant waiting lists [2]. * **Limitation:** The Child-Pugh score is subjective regarding the grading of ascites and encephalopathy [2]. * **Surgical Risk:** Child-Pugh Class C patients have an extremely high perioperative mortality rate (approx. 80%) and are generally contraindicated for elective non-cardiac surgery.

Q: What is the most common cause of chronic pancreatitis?

Alcohol. **Explanation:** **1. Correct Answer: A. Alcohol** Alcohol consumption is the **most common cause** of chronic pancreatitis worldwide, accounting for approximately 70–80% of cases in adults [1]. The pathophysiology involves the "toxic-metabolic" effect of ethanol, which increases the protein concentration of pancreatic secretions. This leads to the formation of protein plugs, which subsequently calcify (forming stones), causing ductal obstruction, chronic inflammation, and irreversible parenchymal fibrosis [1]. **2. Analysis of Incorrect Options:** * **B. Gallstones:** While gallstones are the **most common cause of acute pancreatitis**, they rarely cause chronic pancreatitis. Chronic pancreatitis requires long-term, repeated injury; gallstones typically cause discrete, episodic obstructive events. * **C. Tropical pancreatitis:** This is a specific form of idiopathic juvenile chronic calcific pancreatitis seen in developing countries (like parts of Southern India) [1]. While significant in certain demographics, it is not as common globally or nationally as alcoholic pancreatitis. * **D. ERCP:** Endoscopic Retrograde Cholangiopancreatography is a common cause of **iatrogenic acute pancreatitis**, but it does not lead to the chronic, progressive fibro-inflammatory changes seen in chronic pancreatitis. **3. NEET-PG High-Yield Pearls:** * **Classic Triad:** Pancreatic calcifications (most specific), steatorrhea, and diabetes mellitus (found in only 20-30% of patients). * **Most common symptom:** Epigastric pain radiating to the back [1]. * **Investigation of Choice:** **MRCP** is the most sensitive non-invasive test; **CT scan** is best for visualizing calcifications [1]. * **TIGAR-O Classification:** A mnemonic for etiologies (Toxic-metabolic, Idiopathic, Genetic, Autoimmune, Recurrent/Severe acute, Obstructive). * **Smoking:** Now recognized as an independent risk factor that acts synergistically with alcohol [1].

Q: A 31-year-old woman has experienced increasing malaise for the past 4 months. Physical examination yields no remarkable findings. Laboratory studies show total serum protein of 6.4 g/dL, albumin of 3.6 g/dL, total bilirubin of 1.4 mg/dL, AST of 67 U/L, ALT of 91 U/L, and alkaline phosphatase of 99 U/L. Results of serologic testing for HAV, HBV, and HCV are negative. Test results for ANA, anti-liver kidney microsome-1 and anti-smooth muscle antibody are positive. A liver biopsy is done; microscopically, there are minimal portal mononuclear cell infiltrates with minimal interface hepatitis and mild portal fibrosis. What is the most likely diagnosis?

Autoimmune hepatitis. **Explanation:** The clinical presentation and laboratory findings are classic for **Autoimmune Hepatitis (AIH)**. The patient is a young female (typical demographic) presenting with chronic malaise and elevated transaminases (AST/ALT). The definitive clues are the positive serological markers: **ANA (Anti-nuclear antibody)**, **ASMA (Anti-smooth muscle antibody)**, and **Anti-LKM-1 (Anti-liver kidney microsome-1)** [1]. Histologically, the presence of **interface hepatitis** (inflammation at the portal-parenchymal interface) and mononuclear cell infiltrates are hallmark features of AIH [1]. **Why other options are incorrect:** * **α1-Antitrypsin deficiency:** Typically presents with pulmonary emphysema and liver cirrhosis. Diagnosis is confirmed by low serum α1-antitrypsin levels and PAS-positive, diastase-resistant globules on biopsy. * **Chronic alcoholism:** Usually presents with an AST:ALT ratio > 2:1 and elevated GGT. Histology would show macrovesicular steatosis, Mallory-Denk bodies, and neutrophilic infiltration, rather than mononuclear interface hepatitis. * **HDV infection:** Hepatitis D requires a co-existing or pre-existing HBV infection (HBsAg positive). This patient tested negative for HBV serology. **High-Yield Pearls for NEET-PG:** * **Type 1 AIH:** Most common; characterized by positive **ANA** and/or **ASMA**. * **Type 2 AIH:** More common in children/adolescents; characterized by **Anti-LKM-1** or **Anti-LC1** antibodies. * **Histology Gold Standard:** Interface hepatitis (formerly called "piecemeal necrosis") and plasma cell-rich infiltrates [1]. * **Treatment:** Highly responsive to corticosteroids (Prednisolone) and Azathioprine [1].

Question 1

Which of the following are types of inflammatory bowel disease?

Accepted Answer

Crohn's disease

Answer

Ulcerative colitis

Answer

Toxic colitis

Answer

Amoebic colitis

Question 2

Intermittent dysphagia is caused by which of the following conditions?

Accepted Answer

Pharyngeal diverticulum

Answer

Stricture

Answer

Achalasia cardia

Answer

All of the above

Question 3

Which drug can cause complete histopathological resolution in patients with hepatitis B?

Accepted Answer

Entecavir

Answer

Cyclosporin

Answer

Prednisolone

Answer

None of the above

Question 4

All of the following are features of secretory diarrhea, except?

Accepted Answer

It reduces with fasting

Answer

It is painless

Answer

Stool volume is > 1L /day

Answer

Stool osmotic gap is normal

Question 5

The Child-Pugh score is used for assessing the severity of which condition?

Accepted Answer

Chronic liver disease

Answer

Hepatic encephalopathy

Answer

Uremic encephalopathy

Answer

Head injury

Question 6

What is the most common cause of chronic pancreatitis?

Accepted Answer

Alcohol

Answer

Gallstones

Answer

Tropical pancreatitis

Answer

ERCP

Question 7

A 31-year-old woman has experienced increasing malaise for the past 4 months. Physical examination yields no remarkable findings. Laboratory studies show total serum protein of 6.4 g/dL, albumin of 3.6 g/dL, total bilirubin of 1.4 mg/dL, AST of 67 U/L, ALT of 91 U/L, and alkaline phosphatase of 99 U/L. Results of serologic testing for HAV, HBV, and HCV are negative. Test results for ANA, anti-liver kidney microsome-1 and anti-smooth muscle antibody are positive. A liver biopsy is done; microscopically, there are minimal portal mononuclear cell infiltrates with minimal interface hepatitis and mild portal fibrosis. What is the most likely diagnosis?

Accepted Answer

Autoimmune hepatitis

Answer

a1-Antitrypsin deficiency

Answer

Chronic alcoholism

Answer

HDV infection

Question 8

"Intestinal angina" is a symptom complex of the following:

Accepted Answer

Postprandial abdominal pain, weight loss, chronic mesenteric vessel occlusion

Answer

Postprandial abdominal pain, weight loss, acute mesenteric vessel occlusion

Answer

Pre-prandial abdominal pain, weight loss, chronic mesenteric vessel occlusion

Answer

Postprandial abdominal pain, weight gain, acute mesenteric vessel occlusion

Question 9

Which of the following features differentiates Rotor syndrome from Dubin-Johnson syndrome?

Accepted Answer

The fraction of coproporphyrin I in urine is elevated, usually more than 80% of the total in Rotor syndrome.

Answer

Liver patients with Rotor syndrome have no increased pigmentation and appear normal.

Answer

In Rotor syndrome, the gallbladder is usually visualized on cholecystography.

Answer

Total urinary coproporphyrin is substantially increased in Rotor syndrome.

Question 10

What is the cause of chronic tropical pancreatitis?

Accepted Answer

Cassava ingestion

Answer

Parasitic infection

Answer

Idiopathic

Answer

Genetic

Gastroenterology — MCQs

Gastroenterology — MCQs

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