What GGT levels suggest biliary obstruction?

Updated: Oct 16, 2019
  • Author: Jennifer Lynn Bonheur, MD; Chief Editor: Vinay Kumar Kapoor, MBBS, MS, FRCS, FAMS  more...
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Answer

These levels are elevated in patients with diseases of the liver, biliary tract, and pancreas when the biliary tract is obstructed. Levels parallel the levels of ALP and 5-prime-nucleotidase in conditions associated with cholestasis. The extreme sensitivity of GGT, as opposed to ALP, limits its usefulness; however, the level helps distinguish hepatobiliary disease as the cause of an isolated rise in ALP.


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