NCPF is due to

Pathology of Non-cirrhotic poal fibrosis Characterized by fibrous intimal thickening of the poal vein or its branches Hallmark of disease is thrombosis/sclerosis of the poal vein branches Poal and peripoal fibrosis of varying extent (No bridging fibrosis) Poal vein is dilated with sclerosis of the walls and in autopsy thrombin in the medium or small poal vein branches with accompanying areas of ischemic necrosis Aberrant intrahepatic vessels may be present in the peripoal area, which corresponds to dilated terminal poal vein branches or venues, termed as megasinusoids or peripoal angiomatosis Ref: Blumga 5th edition Pgno : 1088