Portal vein thrombosis risk factors in liver transplant candidates.

Background and aim: Portal vein thrombosis (PVT) is particularly detected in advanced liver cirrhosis patients. We aimed to analyze the risk factors for PVT in liver transplant candidates.

Materials and methods: Dataset for consecutive 165 cirrhotic patients who were evaluated for liver transplantation (LT) were retrospectively analyzed. We sorted patients into two groups: patients with PVT and patients without PVT. Included variables were age, sex, etiology of liver disease, body mass index, MELD-Na score, Child-Pugh score, clinical variables reflecting portal hypertension, and hepatocellular carcinoma. Univariate and multivariate logistic regression analyses were used to identify risk factors of PVT.

Results: Of 165 LT candidates, 46 had PVT (27.9%). Ascites, thrombocytopenia, history of variceal bleeding, and band ligation were risk factors for PVT in univariate analysis. In multivariate analysis, only a history of variceal bleeding (OR 3.45, 95% CI 1.02-11.6, p=0.046) significantly increased the risk of PVT.

Conclusion: The previous history of variceal bleeding predicts PVT development in cirrhosis, suggesting that the severity of portal hypertension is a major predictive factor for PVT in patients with cirrhosis. Future prospective studies are needed to risk stratifying cirrhosis patients prior to LT for future PVT development and to define the prophylactic role of anticoagulation in these patients.