Leucine Aminopeptidase - Serum
Alternate Names : Serum Leucine Aminopeptidase
Definition This is a blood test that measures the amount of the enzyme leucine aminopeptidase (LAP).
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Why is the Test Performed?
LAP is an enzyme normally found in liver cells (hepatocytes). It is is also released into the blood after damage to liver cells, such as from drugs or infection (for example, hepatitis). Measurement of LAP in blood may serve as an indicator of liver damage.
LAP can also be released into blood by tumors that arise in the liver, so it may also serve as a tumor marker or indicator.Other enzymes, such as ALT, AST, ALP, LDH, and GGT, are more commonly measured for the same purpose.
Testing serum LAP is generally not as sensitive or as convenient as testing other liver enzymes to detect some liver problems. Unlike other liver enzymes, LAP can be measured in the urine (see LAP - urine).
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