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

A case with an extremely rare intravenous cystic lesion in the 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 a suprahepatic inferior vena cava which results in Budd-Chiari syndrome.