We observed a significant sign in postenhancement CT of liver cirrhosis, that is visualization of portalvenous branches. During postenhancement CT scanning of liver, the portal vein can not be identifed in liverparenchyme in 84% of patients without known cirrhosis (including chronic active hepatitis). Two have the samehemodynamic changes in that there is diffuse fibrosis and resultant decrease in vascular bed. Visualization ofintrahepatic portal branches in postenhancement CT is because of decreased diffusionability and portalhypertension.