Table 1 

Risk factors of portal vein thrombosis in all patients (n = 67) 

Primary risk factor 
All risk factors 


Prothrombotic disorder n = 19 (28%) 
Prothrombotic disorder n = 36 (54%) Hyperhomocysteinemia (n = 13), antiphospholipid syndrome (n = 9), hormone replacement therapy (n = 2), Factor V Leiden mutation (n = 3), Protein C deficiency (n = 2), Polycythaemia vera (n = 2), myeloproliferative syndrome (n = 1), Protein S deficiency (n = 1), antitrombin III deficiency (n = 1), disseminated coagulation (n = 1), essential thrombocytosis (n = 1) 


Abdominal inflammation n = 13 (19%) 
Abdominal inflammation n = 23 (34%) Chronic pancreatitis (n = 11), Cholangitis (n = 5), acute pancreatitis (n = 2), liver abscesses (n = 2), umbilical vein catheterization (n = 1), cholecystolithiasis (n = 1), polycystic liver disease (n = 1) 


Cirrhosis n = 9 (13%) 
Cirrhosis n = 12 (18%) 


Cancer n = 7 (11%) 
Cancer n = 9 (13%) Neuroendocrine Tumor (n = 4)*, hepatocellular carcinoma (n = 2), pancreatic cancer (n = 1), unknown primary tumour (n = 1), angiomyxoma (n = 1) 


Abdominal intervention n = 5 (8%) 
Abdominal intervention n = 8 (12%) Splenectomy (n = 3), cholecystectomy (n = 2), Billroth II (n = 1), radiofrequency ablation (n = 1), gastropancreaticcystotomy (n = 1) 


Abdominal infection n = 5 (8%) 
Abdominal infection n = 9 (13%) Bacteraemia (n = 4), portal vein phlebitis (n = 2), intestinal tuberculosis (n = 1), sepsis (n = 1), tuberculosis in psoas abscess (n = 1) 


Idiopathic n = 9 (13%) 
Idiopathic n = 9 (13%) 


* A relative large proportion reflecting the centre's specialist function for this disease. Patients can have more than one risk factor. 

Sogaard et al. BMC Gastroenterology 2007 7:34 doi:10.1186/1471230X734 