In case of acute portal vein thrombosis (PVT) prothrombotic factors are identified in about 60% of cases, while a local condition is present in 30% of cases. Prothrombotic factors may indicate a long term anticoagulant therapy whereas the risk of recurrence seems low when a local condition is isolated (cholecystitis, angiocholitis, liver abces, diverticulitis, appendicitis, acute/chronic pancreatitis, chronic bowel inflammatory disease, acute hepatitis due to cytomegalovirus, bacteroïdes pylephlebitis, abdominal neoplasia such as adenocarcinoma of the colon, abdominal traumatism or surgery such as cholecystectomy, bariatric surgery or splenectomy). To date the impact of prothrombotic factors associated with local conditions responsible for acute PVT has not been well studied except for acute or chronic pancreatitis. No significant association has been pointed out in this pathology. The aim is to determine what are the risk factors of thrombotic recurrence or extension associated with local conditions responsible for acute non cirrhotic PVT, and to evaluate the rate of secondary long term anticoagulant therapy.

Inclusion Criteria:

• acute portal thrombosis segmental or truncal, diagnosed in the context of a local inflammatory, infectious, trauma or abdominal surgery cause, dating from less than 3 months.
• patients already included in european cohort ENVIE-VALDIG

Exclusion Criteria:

• liver cirrhosis
• liver, biliary or pancreatic neoplasia
• thrombosis limited to mesenteric vein, splenic vein or splenomesaraic confluence
• cavernoma or Budd-Chiari syndrom

Adult patients 18 years of age or older with acute portal thrombosis segmental or truncal diagnosed in the context of a local cause inflammatory, infectious, trauma or abdominal surgery dating from less than 3 months.