Elevated liver enzymes fr 6mos. no alcohol no medications. not hep a.b.c cmv & ebv. autoimune & u/s neg- not wilson not hemochro not alpha1 antripsin?

Possible fatty liver: If you are not on any medication or taking any herbal supplements that can cause elevated liver enzymes, the most likely diagnosis would still be non-alcoholic fatty liver disease ("fatty liver") even with a normal sonogram. Other imaging studies could confirm this, but the most definitive way to diagnose the cause is a liver biopsy.