Intravenous Lymphatic Cyst in Inferior Vena Cava - A Rare Cause of Budd-Chiari Syndrome.

A case with an extremely rare intravenous cystic lesion in suprahepatic inferior vena cava was reported, which originated from the lymphatic system and had induced Budd-Chiari syndrome. To the best of our knowledge, this is the first report of a benign cystic lesion originating from the wall of suprahepatic inferior vena cava that results in Budd-Chiari syndrome.