A classification of testicular cancers that arise in specialized sex cells called germ cells.

A group of testicular cancers that begin in the germ cells (cells that give rise to sperm). Nonseminomas are identified by the type of cell in which they begin and include embryonal carcinoma, teratoma, choriocarcinoma, and yolk sac carcinoma.

Together with seminomas, nonseminomas make up the two histological subtypes of testicular germ cell tumour (TGCT). TGCT, again, is the common type of testicular cancer.