Strauchen J A, Bergman S M, Hanson T A, Javadpour N
Urology. 1979 Dec;14(6):613-6. doi: 10.1016/0090-4295(79)90538-7.
A case is presented of widely metastatic choriocarinoma, associated with an intratubular proliferation of atypical germ cells in the testis and a minute adult cystic teratoma. Immunoperoxidase study of the intratubular germ cells did not confirm their trophoblastic origin. Intratubular proliferation of undifferentiated germ cells may be associated with choriocarcinoma.