Objective:To analyze the clinical epidemiological characteristics of Budd-Chiari syndrom (BCS), and provide an epidemiological basis for the etiological study on its underlying diseases.
Methods:The epidemiological data of 1148 patients with BCS from all area of our country, who treated in the affiliated Hospital, Xuzhou Medical College in the last 20 years, were collected. According to the pathogenic location, BCS was divided into three types ［hepatic vein (HV), inferior vena cava (IVC) and HV combined with IVC (MIX)］ and eight subtypes. A descriptive analysis was carried out by age, sex and regional distribution.
Results:The cases of BCS had gradually increased in the last 20 years, especially in adults. The ratio between male and female was 1.00∶1.25. The IVC type accounted for most of the cases,while  HV and MIX types were the second and the least, respectively. The majority of the patients came form the provinces of Jiangsu, Anhui, Shandong, Henan and Hunan. Among them, the patients of Jiangsu accounted for 50.61% of BCS cases. Restenosis developed in about 7.75 percent of patients after interventional treatment.
Conclusions: IVC is the main type of BCS admitted to the affiliated Hospital, Xuzhou Medical College. Most of the BCS patients live around the Yellow River region, and the cause of the disease is not clear. Our study may provide a reference for etiological study on underlying diseases of BCS.