Myeloproliferative neoplasms (MPNs), including polycythemia vera, essential thrombocythemia, and primary myelofibrosis, may lead to gastroesophageal varices. The quality of life, morbidity, and mortality of MPN patients mainly depend on disease-related symptoms, thromboembolic and hemorrhagic complications. Previous studies have shown that JAK2 V617F has a prominent role in vascular risk and MPN-associated gastroesophageal varices. Portal vein thrombosis and portal cavernoma frequently occur in the MPN population and the management of gastroesophageal varices in these patients are sometimes technically difficult. The aim of this study is to investigate the the characteristics of patients with gastroesophageal varices and portal caver cavernoma with or without JAK2 mutation.

Inclusion Criteria:

• male or female patients aged 18-75
• diagnosed as portal hypertension and portal cavernoma by contrast-enhanced computed tomography
• underwent JAK2 mutation test

Exclusion Criteria:

• combined known etiologies of chronic liver disease, including hepatitis, primary biliary cirrhosis, schistosomiasis, and non-alcoholic fatty liver disease.
• other factors judged by the investigator that may affect the safety of the subject or the compliance of the trial. Such as serious illnesses (including mental illness) that require combined treatment, serious laboratory abnormalities, or other family or social factors.

Patients who diagnosed with portal cavernoma and gastric and/or esophageal varices and underwent JAK2 mutation test.