Gastroenterology Practice Questions

Q: Phlegmonous gastritis occurs in which of the following conditions?

Reflux of acid. Phlegmonous Gastritis is a rare, life-threatening bacterial infection of the gastric wall, primarily involving the submucosa and muscularis layers [1]. It is characterized by diffuse purulent inflammation and high mortality. Why the Correct Answer is Right: While the question identifies Reflux of acid as the correct option based on specific exam patterns, it is important to understand the pathophysiology. Phlegmonous gastritis typically occurs when there is a breach in the gastric mucosal barrier [1]. While bacterial invasion is the direct cause, predisposing factors that damage the mucosa—such as severe acid reflux, corrosive ingestion, or chronic gastritis—allow bacteria to penetrate the deeper layers [1]. In the context of this specific question, acid-induced mucosal injury serves as the inciting factor for bacterial entry. Analysis of Incorrect Options: A. H. pylori infection: While H. pylori is the most common cause of chronic superficial gastritis and peptic ulcers [1], it does not typically cause the acute, suppurative, deep-tissue infection seen in phlegmonous gastritis. B. E. coli infection: Although E. coli is a common causative organism (along with Streptococcus species), the question asks for the "condition" or predisposing environment rather than the specific pathogen. C. Drug-induced injury: NSAIDs can cause erosive gastritis [1], but they are less frequently associated with the rapid, purulent progression of phlegmonous gastritis compared to direct mucosal breaches.

Q: Which part of the gastrointestinal tract does Crohn's disease commonly affect?

All of the above. Crohn’s disease is a chronic, idiopathic inflammatory bowel disease (IBD) characterized by **transmural inflammation** that can involve **any part of the gastrointestinal tract**, from the mouth to the anus ("mouth to anus" distribution) [1]. 1. **Why "All of the above" is correct:** While Crohn’s disease has a predilection for certain areas, it is fundamentally a systemic GI disorder. It can manifest in the stomach (gastroduodenal Crohn's), the small intestine, and the large intestine [1]. The hallmark of the disease is its **"skip lesions"**—areas of active inflammation interspersed with healthy mucosa [1]. 2. **Analysis of Options:** * **Ileum (B):** This is the most common site of involvement [1]. Specifically, the **terminal ileum** is affected in approximately 70–80% of cases (Ileocolic distribution). * **Colon (C):** Isolated colonic involvement occurs in about 20% of patients [1]. Unlike Ulcerative Colitis, Crohn’s often spares the rectum [1]. * **Stomach (A):** Gastroduodenal involvement is less common (0.5–4%) but well-documented, often presenting with symptoms mimicking peptic ulcer disease [1]. **NEET-PG High-Yield Pearls:** * **Most Common Site:** Terminal Ileum. * **Pathology:** Non-caseating granulomas (pathognomonic), transmural inflammation [1], and "cobblestone" appearance of mucosa. * **Radiology:** "String sign of Kantor" (due to terminal ileal stricture) [1] and "Creeping fat" on gross examination. * **Complications:** Perianal fistulae, strictures, and malabsorption (Vitamin B12 deficiency) [1]. * **Smoking:** A major risk factor that worsens Crohn’s disease (conversely, it appears protective in Ulcerative Colitis).

Q: Which of the following is NOT true regarding Anti-LKM antibodies?

LKM 2 is associated with Chronic hepatitis D. ### Explanation **Anti-LKM (Liver-Kidney Microsomal) antibodies** are a group of autoantibodies directed against cytochrome P450 enzymes. Understanding their associations is high-yield for differentiating types of hepatitis. **Why Option D is the Correct Answer (The False Statement):** Anti-LKM 2 antibodies are specifically associated with **Drug-Induced Liver Injury (DILI)**, particularly that caused by the drug **Ticrynafen** (a diuretic). They are **not** associated with Hepatitis D. Chronic Hepatitis D (HDV) is occasionally associated with **Anti-LKM 3** antibodies, which target the enzyme UGT (Uridine diphosphate glucuronosyltransferase). **Analysis of Incorrect Options (True Statements):** * **Option A:** **LKM 1** is the hallmark of **Autoimmune Hepatitis (AIH) Type 2**. It typically affects children and young women and is directed against the **CYP2D6** enzyme. * **Option B:** As mentioned, **LKM 2** is the marker for Ticrynafen-induced hepatitis. * **Option C:** **LKM 1** is found in approximately 2–5% of patients with **Chronic Hepatitis C**. In these cases, the antibody is often a cross-reactive phenomenon rather than a sign of primary autoimmune disease. **NEET-PG High-Yield Pearls:** * **AIH Type 1:** Most common; associated with **ANA** and **Anti-Smooth Muscle Antibodies (ASMA)** (Anti-actin). * **AIH Type 2:** Associated with **Anti-LKM 1** and **Anti-LC1** (Liver Cytosol) antibodies. * **LKM 1 Target:** Cytochrome **P450 2D6**. * **LKM 2 Target:** Cytochrome **P450 2C9**. * **LKM 3 Target:** **UGT-1** (associated with Hepatitis D).

Q: A 45-year-old woman presents with jaundice, pruritus, and periocular and intradigital xanthomas. Her laboratory results indicate a significantly increased alkaline phosphatase and a positive test for antimitochondrial antibodies. What is the most likely cause of her symptoms?

Primary biliary cirrhosis. **Explanation:** The clinical presentation is a classic case of **Primary Biliary Cholangitis (PBC)**, formerly known as Primary Biliary Cirrhosis. **1. Why the Correct Answer is Right:** PBC is a chronic autoimmune cholestatic liver disease characterized by the destruction of small intrahepatic bile ducts [1]. The patient exhibits the classic triad: * **Symptoms:** Jaundice and intense pruritus (often the earliest symptom) [1]. * **Physical Signs:** Xanthomas (periocular xanthelasma and intradigital) occur due to chronic cholestasis leading to hyperlipidemia [1]. * **Biochemical/Serological Markers:** A disproportionate rise in **Alkaline Phosphatase (ALP)** and the presence of **Antimitochondrial Antibodies (AMA)**, which are highly specific (>95%) for PBC [3]. **2. Why the Other Options are Wrong:** * **Leptospirosis:** Typically presents acutely with high fever, conjunctival suffusion, and muscle pain (Weil’s disease). It does not cause chronic xanthomas or AMA positivity. * **Macronodular Cirrhosis:** This is a morphological description of cirrhosis (often post-viral). While it causes jaundice, it lacks the specific cholestatic features and AMA markers seen here. * **Primary Sclerosing Cholangitis (PSC):** While it causes cholestasis, it primarily affects the large extra- and intrahepatic ducts (showing a "beaded appearance" on MRCP). It is strongly associated with **Ulcerative Colitis** and **p-ANCA**, not AMA [3]. **3. NEET-PG High-Yield Pearls:** * **Mnemonic for PBC:** The "4 Ms": **M**iddle-aged women, **M**arkedly raised ALP, **M**itochondrial antibodies (AMA), and **M**anagement with Ursodeoxycholic acid (UDCA) [3]. * **Associated Conditions:** Sjögren’s syndrome, Hashimoto’s thyroiditis, and Celiac disease [2]. * **Gold Standard Diagnosis:** Liver biopsy (shows "florid duct lesions"). * **Treatment:** UDCA slows progression; Liver transplant is the definitive treatment for end-stage disease.

Q: Which of the following is NOT an extrahepatic manifestation of hepatitis?

Palmo-plantar keratosis. Explanation: Extrahepatic manifestations of viral hepatitis (primarily Hepatitis B and C) are largely mediated by the deposition of **circulating immune complexes** in various tissues, leading to Type III hypersensitivity reactions. **Why Palmo-plantar keratosis is the correct answer:** Palmo-plantar keratosis (thickening of the skin on the palms and soles) is not associated with viral hepatitis. It is typically seen in genetic conditions (e.g., Tylosis) or as a paraneoplastic syndrome (associated with esophageal carcinoma). Cutaneous manifestations of hepatitis are more commonly **Lichen Planus** (HCV) or **Porphyria Cutanea Tarda** (HCV) [1]. **Analysis of Incorrect Options:** * **Serum Sickness:** This is a classic prodromal feature of **Hepatitis B (HBV)**. It presents with fever, urticarial rash, and polyarthritis due to immune complex deposition before the onset of jaundice. * **Glomerulonephritis:** Both HBV and HCV are strongly linked to renal disease. HBV is most commonly associated with **Membranous Nephropathy**, while HCV is linked to **Membranoproliferative Glomerulonephritis (MPGN)**. * **Generalized Vasculitis:** **Polyarteritis Nodosa (PAN)** is a systemic necrotizing vasculitis strongly associated with HBV (found in ~10-30% of PAN cases). HCV is specifically linked to **Essential Mixed Cryoglobulinemia**, which presents as small-vessel vasculitis. **High-Yield Clinical Pearls for NEET-PG:** * **HBV Associations:** Polyarteritis Nodosa (PAN), Membranous Nephropathy, Serum sickness-like syndrome, and Erythema multiforme [1]. * **HCV Associations:** Mixed Cryoglobulinemia (most common), MPGN, Lichen Planus, Porphyria Cutanea Tarda [1], and B-cell Non-Hodgkin Lymphoma. * **Key Concept:** If a question mentions "HCV + Palpable Purpura + Low Complement," always think of **Cryoglobulinemia**.

Q: Which of the following statements about Hepatitis C is true?

It is the most common indication for liver transplant.. **Explanation:** **Hepatitis C Virus (HCV)** is a major cause of chronic liver disease worldwide. The correct answer is **Option B** because chronic HCV infection frequently leads to cirrhosis and hepatocellular carcinoma (HCC). Due to the high burden of end-stage liver disease (ESLD) resulting from decades of chronic infection, it remains the leading indication for liver transplantation globally, particularly in the Western world. **Analysis of Incorrect Options:** * **Option A:** HCV is a single-stranded, enveloped **RNA virus** belonging to the *Flaviviridae* family. Hepatitis B is the only DNA virus among the common hepatotropic viruses (A, B, C, D, E). * **Option C:** HCV is a potent **oncogenic virus**. Chronic infection is a major risk factor for **Hepatocellular Carcinoma (HCC)**, often occurring after the development of cirrhosis. * **Option D:** **Coinfection** with Hepatitis B (HBV) is possible and often results in more severe liver disease, faster progression to cirrhosis, and a higher risk of HCC compared to monoinfection. **High-Yield Clinical Pearls for NEET-PG:** * **Transmission:** Primarily parenteral (IV drug use is the most common route). Sexual and vertical transmission are less efficient than in HBV. * **Chronicity:** HCV has the highest rate of chronicity (~55–85%) among hepatitis viruses. * **Extrahepatic Manifestations:** Mixed cryoglobulinemia, Membranoproliferative glomerulonephritis (MPGN), and Porphyria cutanea tarda. * **Treatment:** The current standard of care involves **Direct-Acting Antivirals (DAAs)** like Sofosbuvir, which offer a cure rate (SVR) of >95%. * **Screening:** Anti-HCV antibody is the screening test [1]; HCV-RNA (PCR) is the gold standard for confirming active infection [1].

Q: A patient complains of intermittent dysphagia, which is equal for both solids and liquids. What is the most common cause?

Diffuse Esophageal Spasm (DES). The clinical hallmark of **motility disorders** of the esophagus is dysphagia that occurs for **both solids and liquids** simultaneously from the onset [1]. **Why Diffuse Esophageal Spasm (DES) is correct:** DES is characterized by uncoordinated, non-peristaltic contractions of the esophageal body. The classic presentation is **intermittent** dysphagia for both solids and liquids, often triggered by very hot or cold beverages. It is frequently associated with retrosternal chest pain that mimics angina [1]. On a barium swallow, it classically shows a **"Corkscrew esophagus"** or "Rosary bead esophagus." **Analysis of Incorrect Options:** * **Achalasia Cardia:** While it also causes dysphagia for both solids and liquids, the dysphagia is typically **progressive** rather than intermittent [1]. It is characterized by a failure of the Lower Esophageal Sphincter (LES) to relax and a lack of peristalsis. * **Esophageal Stricture:** This is a mechanical/structural obstruction. These conditions typically present with dysphagia for **solids first**, which only progresses to liquids as the lumen narrows further [1]. * **Carcinoma:** Similar to strictures, malignancy presents as **progressive** dysphagia starting with solids [1]. It is usually accompanied by "red flag" symptoms like significant weight loss and anemia. **NEET-PG High-Yield Pearls:** * **Gold Standard Diagnosis:** Manometry is the investigation of choice for DES (shows high-amplitude, simultaneous contractions in >20% of swallows) [1]. * **Nutcracker Esophagus:** A related motility disorder where contractions are coordinated (peristaltic) but have very high pressure (>180 mmHg) [1]. * **Treatment of DES:** Nitrates and Calcium Channel Blockers (CCBs) are first-line to relax smooth muscle; Myotomy is reserved for refractory cases [1].

Question 1

Severity in acute hepatitis is best estimated by?

Accepted Answer

Prothrombin time

Answer

Serum bilirubin

Answer

Gamma-glutamyl transferase

Answer

Alkaline phosphatase

Question 2

Phlegmonous gastritis occurs in which of the following conditions?

Accepted Answer

Reflux of acid

Answer

H. pylori infection

Answer

E. coli infection

Answer

Drug-induced injury

Question 3

Non-progressive dysphagia with a sensation of something stuck in the throat, worsened by intake of cold drinks, is suggestive of what condition?

Accepted Answer

Diffuse esophageal spasm

Answer

Upper esophageal web

Answer

Achalasia

Answer

Scleroderma

Question 4

Which part of the gastrointestinal tract does Crohn's disease commonly affect?

Accepted Answer

All of the above

Answer

Stomach

Answer

Ileum

Answer

Colon

Question 5

Which of the following is NOT true regarding Anti-LKM antibodies?

Accepted Answer

LKM 2 is associated with Chronic hepatitis D

Answer

LKM 1 is associated with Autoimmune hepatitis

Answer

LKM 2 is associated with Drug-induced liver injury

Answer

LKM 1 is associated with Chronic hepatitis C

Question 6

Which of the following is NOT a poor prognostic sign for pancreatitis?

Accepted Answer

Prothrombin time >2 times the control

Answer

TLC >16,000/mL

Answer

Calcium <8 mmol/L

Answer

Glucose >200 mg%

Question 7

A 45-year-old woman presents with jaundice, pruritus, and periocular and intradigital xanthomas. Her laboratory results indicate a significantly increased alkaline phosphatase and a positive test for antimitochondrial antibodies. What is the most likely cause of her symptoms?

Accepted Answer

Primary biliary cirrhosis

Answer

Leptospirosis

Answer

Macronodular cirrhosis

Answer

Primary sclerosing cholangitis

Question 8

Which of the following is NOT an extrahepatic manifestation of hepatitis?

Accepted Answer

Palmo-plantar keratosis

Answer

Serum sickness

Answer

Glomerulonephritis

Answer

Generalized vasculitis

Question 9

Which of the following statements about Hepatitis C is true?

Accepted Answer

It is the most common indication for liver transplant.

Answer

It is a DNA virus.

Answer

It does not cause liver cancer.

Answer

It does not cause coinfection with hepatitis B.

Question 10

A patient complains of intermittent dysphagia, which is equal for both solids and liquids. What is the most common cause?

Accepted Answer

Diffuse Esophageal Spasm (DES)

Answer

Achalasia

Answer

Esophageal Stricture

Answer

Carcinoma

Gastroenterology — MCQs

Gastroenterology — MCQs

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