Which of the following is the most common cause of acute pancreatitis in India?

Explanation

## Etiology of Acute Pancreatitis: Geographic Variation **Key Point:** Gallstones are the most common cause of acute pancreatitis in India, accounting for approximately 40–60% of cases. Alcohol is the leading cause in Western countries and in certain subpopulations, but Indian epidemiological data consistently places gallstones at the top. ### Epidemiological Comparison: India vs. West | Cause | India | Western Countries | Notes | |-------|-------|-------------------|-------| | **Gallstones** | 40–60% (Most common) | 40–50% (Most common) | Leading cause in India and most of the world | | **Alcohol** | 20–30% | 30–40% | Second most common in India; dominant in certain Western populations | | **Idiopathic** | 10–20% | 10–15% | Diagnosis of exclusion | | **Hypertriglyceridemia** | 5–10% | 5–10% | Similar prevalence globally | | **Other** (trauma, drugs, ERCP, infections) | 5–10% | 5–10% | Includes post-ERCP, medications | **High-Yield:** Gallstones are the most common cause of acute pancreatitis **both in India and globally**. Alcohol is the predominant cause in chronic pancreatitis in India, which is a common source of confusion in exam questions. ### Why Gallstones Cause Pancreatitis 1. **Transient obstruction** of the ampulla of Vater by a migrating gallstone. 2. **Bile reflux** into the pancreatic duct → activation of pancreatic enzymes. 3. **Ductal hypertension** → acinar cell injury and autodigestion. 4. **Inflammatory cascade** → local and systemic complications. **Clinical Pearl:** The confusion arises because **chronic pancreatitis** in India is predominantly alcohol-related, whereas **acute pancreatitis** is predominantly gallstone-related. NEET PG questions frequently test this distinction. (Harrison's Principles of Internal Medicine, 21e, Ch. 347; Sabiston Textbook of Surgery) ### Common Causes of Acute Pancreatitis — Mnemonic: GET SMASHED - **G**allstones ← Most common in India & worldwide - **E**thanol (Alcohol) ← Most common cause of *chronic* pancreatitis in India - **T**rauma - **S**teroids - **M**umps / Metabolic (hypertriglyceridemia) - **A**utoimmune - **S**corpion sting (regional) - **H**ypercalcemia - **E**RCP - **D**rugs (azathioprine, valproate, etc.) [cite: Harrison's 21e Ch. 347; Park's Textbook of Preventive & Social Medicine 26e]