
INFO/WWW-LINKS: 
    A portal/lienal vein thrombosis may be idiopathic (mostly) or caused by e.g. 
    (1) Tumor invasion by HCC, cholangiocarcinoma, pancreatic carcinoma, gastric 
    carcinoma / extrinsic compression by tumor (2) Trauma; umbilical venous catheterization 
    (3) Blood dyscrasia; clotting disorder; estrogen therapy; severe dehydration; 
    Cx of splenectomy (7%, higher in patients with myeloproliferative disorders) 
    (4) Intraabdominal sepsis with phlebitis; perinatal omphalitis; pancreatitis; 
    ascending cholangitis (5) Cirrhosis + portal hypertension (5%) 
    (Wolfgang Dähnert, Dähnert`s Electronic Radiology 
    Review, Williams and Wilkins 1998)