KRT18 and autoimmune hepatitis: In a study of 53 liver biopsies, CK8/CK18 positivity was observed in 83.3% and 83.3% of HCCs versus 45.5% and 36.4% in chronic active hepatitis B, 20% and 26.7% in chronic active hepatitis C, and 90% and 70% in autoimmune hepatitis (AIH), respectively.