Question

which of the following marker would be most helpful in determining if an elevated alkaline phosphatase is due to a liver or bone issue?
a) ggtp
b) ldh
c) ast
d) gtt
e) esr

Explanation:

To determine if elevated alkaline phosphatase (ALP) is from liver or bone, we analyze the markers:

• a) GGTP (Gamma - Glutamyl Transferase): Elevated with liver - related ALP (e.g., cholestasis, liver disease), normal in bone - related ALP (e.g., Paget’s disease, bone growth). So it helps differentiate.
• b) LDH (Lactate Dehydrogenase): Indicates tissue damage (like heart, muscle, liver) but not specific to liver vs. bone for ALP origin.
• c) AST (Aspartate Aminotransferase): Liver - specific (hepatocyte damage) but doesn’t distinguish liver vs. bone as a cause for ALP elevation.
• d) GTT (Glucose Tolerance Test): Assesses glucose metabolism (diabetes), irrelevant to ALP origin.
• e) ESR (Erythrocyte Sedimentation Rate): Measures inflammation, not specific to liver/bone ALP causes.

GGTP is most helpful as it’s liver - associated and can clarify if ALP elevation is liver - based (vs. bone - based, where GGTP is normal).

Answer:

a) GGTP