Hello,you have done all test which came negative and still you have elevated
liver enzymes . Check platelet count for thrombocytopenia.You are left with one investigation ,liver biopsy- A liver biopsy also is commonly performed to help diagnose and stage certain liver diseases, including:
Nonalcoholic fatty liver disease, Autoimmune hepatitis,Alcoholic liver disease,Primary biliary cirrhosis,Primary sclerosing cholangitis,Hemochromatosis,Wilson's disease.