PT - JOURNAL ARTICLE AU - Edoardo G. Giannini AU - Roberto Testa AU - Vincenzo Savarino TI - Liver enzyme alteration: a guide for clinicians AID - 10.1503/cmaj.1040752 DP - 2005 Feb 01 TA - Canadian Medical Association Journal PG - 367--379 VI - 172 IP - 3 4099 - http://www.cmaj.ca/content/172/3/367.short 4100 - http://www.cmaj.ca/content/172/3/367.full SO - CMAJ2005 Feb 01; 172 AB - ISOLATED ALTERATIONS OF BIOCHEMICAL MARKERS OF LIVER DAMAGE in a seemingly healthy patient can present a challenge for the clinician. In this review we provide a guide to interpreting alterations to liver enzyme levels. The functional anatomy of the liver and pathophysiology of liver enzyme alteration are briefly reviewed. Using a schematic approach that classifies enzyme alterations as predominantly hepatocellular or predominantly cholestatic, we review abnormal enzymatic activity within the 2 subgroups, the most common causes of enzyme alteration and suggested initial investigations.