Japanese periodical nationwide epidemiologic survey of aberrant portal hemodynamics

Aim Idiopathic portal hypertension (IPH), extrahepatic portal obstruction (EHO), and Budd–Chiari syndrome (BCS) are characterized by aberrant portal hemodynamics of unknown etiology. The aim of this study was to explore trends in the descriptive epidemiology of these diseases through periodical nationwide surveys. Methods Nationwide epidemiologic surveys were undertaken in 1999, 2005, and 2015 using the same protocol. The survey targets were...