[Bilateral and familial occurrence of germ cell tumors of the testis].

A reclassification study based on the W.H.O. nomenclature was made of 255 testicular germ cell tumours examined in the Department of Pathology of the District Hospital Schwerin between 1958 and 1985. Thereby some cases of bilateral and familial occurrence were found. 4 cases (1.6%) with bilateral tumours were observed. Only in one of the four cases both tumours were discovered at the same time. The longest interval before contralateral occurrence was 19 years. Familial connections were found in 6 cases (2.4%), in one twin-pair and twice in brothers.