AMA (antimitochondrial antibody)
This test is used when doctors are looking for evidence of primary biliary cirrhosis (PBC). This is because antimitochondrial antibodies are found in more than 90% of patients with this disease.
SMA (smooth muscle antibody)
This is a test that is used to detect autoimmune diseases such as autoimmune hepatitis (AIH). A liver biopsy is usually necessary to confirm the diagnosis and stage of the disease.
LKM (liver/kidney/microsomal antibody)
This test can be positive in a subtype of autoimmune hepatitis.