A 48-year-old man with chronic alcohol use disorder undergoes liver biopsy. Histology reveals steatosis, hepatocyte necrosis, and prominent neutrophilic infiltration. Which of the following is the most common cause of death in patients with acute alcoholic hepatitis?

Explanation

## Most Common Cause of Death in Acute Alcoholic Hepatitis **Key Point:** Hepatic encephalopathy due to acute hepatocellular failure is the most common cause of death in patients with acute alcoholic hepatitis. ### Pathophysiology of Hepatic Encephalopathy in Alcoholic Hepatitis Acute alcoholic hepatitis causes: 1. Massive hepatocyte necrosis and loss of synthetic function 2. Impaired ammonia metabolism and detoxification 3. Accumulation of neurotoxic metabolites (ammonia, manganese, endogenous benzodiazepines) 4. Cerebral edema and increased intracranial pressure 5. Altered neurotransmitter balance (↑ GABA, ↓ glutamate) **High-Yield:** Acute hepatocellular failure in alcoholic hepatitis leads to: - Coagulopathy (↓ PT/INR) - Hypoglycemia - Lactic acidosis - Hepatic encephalopathy (Grades I–IV) - Multi-organ failure ### Mortality Stratification in Acute Alcoholic Hepatitis | Complication | Frequency | Mortality Impact | Timing | |--------------|-----------|------------------|--------| | **Hepatic encephalopathy** | 30–50% of severe cases | Highest (>80% if Grade III–IV) | Days to weeks | | **Variceal hemorrhage** | 5–15% (if cirrhosis present) | High (30–50%) | Variable | | **Hepatorenal syndrome** | 10–15% | Very high (>90% without treatment) | Weeks | | **Spontaneous bacterial peritonitis** | 10–30% (if ascites) | Moderate–high (30–50%) | Days–weeks | **Clinical Pearl:** While hepatorenal syndrome (HRS) has the highest mortality rate *when it occurs*, hepatic encephalopathy is more frequent and therefore the leading cause of death overall in acute alcoholic hepatitis. ### Why Hepatic Encephalopathy Is Most Common - Occurs early in the course of acute hepatitis (within days) - Reflects the degree of hepatocellular necrosis and loss of detoxifying capacity - Directly correlates with severity scores (MELD, Child-Pugh) - Often precipitates multi-organ failure ### Why Other Options Are Less Common as Primary Cause - **Variceal hemorrhage:** Requires pre-existing or concurrent cirrhosis; not all patients with acute alcoholic hepatitis have varices. - **Hepatorenal syndrome:** Although highly lethal when present, it occurs in only 10–15% of cases and often develops after encephalopathy. - **Spontaneous bacterial peritonitis:** Occurs in 10–30% of patients with ascites, but is not the primary cause of death in acute hepatitis without advanced cirrhosis. [cite:Harrison 21e Ch 297]