GGT is often elevated more than tenfold in which condition?

• A. Chronic cholestasis
• B. Acute pancreatitis
• C. Iron deficiency anemia
• D. Hyperthyroidism

Answer: (A)

GGT rises most strikingly with cholestasis, reflecting biliary tract dysfunction. In chronic cholestasis, bile flow is impaired for an extended period, causing marked biliary enzyme elevation. Gamma-glutamyl transferase is concentrated in the bile duct epithelium and responds readily to bile duct obstruction, so it is commonly elevated well beyond tenfold of the normal limit in this setting. In contrast, acute pancreatitis mainly affects pancreatic enzymes; iron deficiency anemia and hyperthyroidism do not cause such pronounced GGT elevations. Therefore, chronic cholestasis is the scenario where GGT is often more than tenfold elevated.