Cytogenetic study of a testicular tumor in a translocation (13;14) carrier.

We performed chromosomal analysis of a primary testicular tumor from an individual who, on subsequent analysis of peripheral blood, was found to have a balanced (13q14q) translocation. Histologically, the tumor was a mixed germ cell neoplasm, predominantly embryonal carcinoma, with some teratomatous elements. The modal chromosome count of the tumor cells was 62, with most counts ranging from 54 to 66. In addition to a t(13q14q) chromosome (of constitutional origin), nine nonrandomly acquired chromosomal abnormalities were identified, including an abnormal chromosome #1 and a probable i(12p). These findings are further discussed and compared with cytogenetic data on human testicular neoplasms from the literature. This case is also discussed with regard to the possible association of a constitutional t(13q14q) and various malignancies and related disorders.