Intrapleural endodermal sinus tumor arising from the diaphragm.

We report a primary endodermal sinus tumor (EST) of the right hemidiaphragm, presenting as a right-sided hemothorax in an 18-month-old female. Four operations were performed, the last three being indicated solely by an elevated level of serum alpha-fetoprotein (AFP). Cyclic chemotherapy with varying drug combinations together with irradiation therapy were not effective in controlling the disease. To our knowledge, this is the first instance of a primary EST arising from the diaphragm.