Which condition gives rise to the highest serum level of transaminases?

• A. Alcoholic cirrhosis
• B. Obstructive biliary disease
• C. Diffuse intrahepatic cholestasis
• D. Acute hepatitis

Answer: (D)

Transaminases reflect hepatocellular injury, and the largest rises occur when there is extensive acute hepatocellular damage. In acute hepatitis, a large number of hepatocytes are necrotic or severely damaged at once, causing a massive leakage of ALT and AST into the bloodstream. This leads to the highest serum transaminase levels, often reaching very high values. In contrast, obstructive biliary disease and cholestasis involve impaired bile flow with a cholestatic pattern dominated by alkaline phosphatase and GGT; transaminases may rise but not to the same extreme. Alcoholic liver disease can elevate transaminases, but the absolute levels are typically lower than in acute hepatitis, and the AST:ALT ratio is commonly around 2:1 rather than reflecting widespread acute hepatocyte necrosis.