(A) Normal liver. Arrows indicate CD90 expression in portal area. Mature hepatocytes do not express CD90 protein.
(B) Chronic hepatitis with cirrhosis. Red arrows indicated CD90+ population in fibrous septa which was infiltrated by inflammatory cells. Blue arrows indicated CD90+ hepatocytes.
(C) Hepatocellular carcinoma. Red arrows indicated CD90 expression in tumor stroma. CD90+ neoplastic cells were indicated by blue arrows. Green arrows indicate CD90+ endothelium.
