Pathology Handbook

GGT

Synonyms

Gamma GT

Clinical Indications

This enzyme is a sensitive marker of liver insult; it is raised in cases of excessive alcohol consumption, when other liver markers may be normal. 

It is used to distinguish between  bone and liver causes of a raised alkaline phosphatase level.

Some drugs (e.g. phenytoin) act as an enzyme inducer and GGT levels may be elevated in the absence of any liver pathology

Request Form 

Request on ICE

Availability

On request

Specific Criteria

None

Patient Preparation

None

Turnaround Time

Same day 

Specimen

Serum in SST vacutainer

Volume

2 mL

Container

Vacutainer gold top

Causes for Rejection

Unlabelled sample
Not meeting specific criteria for analysis. 

Reference Range

Males:    10 - 71 u/L

Females: 6 - 42 u/L