Primary germ cell tumor of the diaphragm.

The authors present a case of a 2-year-old boy with an abdominal mass, which was later found to be a yolk sac tumor arising from the diaphragm. To the authors' knowledge there has been only 1 previous report of a germ cell tumor arising from the diaphragm. This case illustrates the imaging findings in this rare tumor and how it could be confused with a primary liver neoplasm.