Which laboratory value is most indicative of hepatocellular injury when elevated?

Which laboratory value is most indicative of hepatocellular injury when elevated?

• A. ALP
• B. ALT
• C. Bilirubin
• D. Digoxin levels

Answer: (B)

When liver cells are damaged, enzymes inside them leak into the bloodstream. Alanine aminotransferase is highly concentrated in liver tissue, so its elevation most directly signals hepatocellular injury. Alkaline phosphatase tends to rise with biliary tract problems or bone turnover, not primarily liver cell damage. Bilirubin elevation indicates issues with processing or excretion by the liver (or increased production) but isn’t specific to hepatocyte injury. Digoxin levels reflect a drug concentration, not liver cell damage. So, an elevated ALT is the best indicator of hepatocellular injury.

When liver cells are damaged, enzymes inside them leak into the bloodstream. Alanine aminotransferase is highly concentrated in liver tissue, so its elevation most directly signals hepatocellular injury. Alkaline phosphatase tends to rise with biliary tract problems or bone turnover, not primarily liver cell damage. Bilirubin elevation indicates issues with processing or excretion by the liver (or increased production) but isn’t specific to hepatocyte injury. Digoxin levels reflect a drug concentration, not liver cell damage. So, an elevated ALT is the best indicator of hepatocellular injury.