Chyliform pleural effusion. An unusual manifestation of hepatothoracic echinococcus cysts

A case of hepatothoracic echinococcosis with the unusual manifestation of a large, right, chyliform pleural effusion is presented. The possible etiology, the pathogenesis, and the origin of this chyliform fluid are discussed, and the methods used to differentiate chyliform fluid from true chyle and pseudochyle are described.