This book offers a systematic introduction to Budd-Chiari syndrome, a rare but life-threatening vascular disorder of the liver, which refers to obstructions at any site from the hepatic veins to the suprahepatic inferior vena cava. The book mainly covers the history, epidemiology, etiology and risk factors, pathology, diagnosis, pharmacological and interventional aspects, surgical treatment, etiological treatment, and prognostic assessment of Budd-Chiari syndrome. Notably, it also presents cutting-edge research findings in this field. The early diagnosis of Budd-Chiari syndrome is vital, as it allows clinicians to pursue more targeted and effective treatment strategies, thus improving patient outcomes. However, much information, including the latest advances, has not yet been fully disseminated in current clinical practice. This book addresses that gap, helping physicians to improve diagnosis and establish standard treatment strategies, helping researchers conduct clinical and experimental studies, and even helping patients and their relatives to recognize this disease.