Gonadal effects of cancer therapy in boys.

A retrospective study of testicular histology was carried out in 21 prepubertal boys and in 11 intrapubertal or postpubertal boys who died from 1 day to 1 year after treatment with chemotherapy (CT) with or without radiation therapy (RT) for extragonadal solid tumors. Based on autopsy findings, profound histologic changes were found in six prepubertal boys and in all but one of the intrapubertal and postpubertal boys. For three of the prepubertal and five of the postpubertal boys with altered testicular histology, the contribution of pelvic RT could not be excluded. When prepubertal patients were evaluated according to nutritional status, a thickened tubular wall and absent or severely reduced spermatogonia were found in only 1 of 11 adequately nourished boys as compared with 5 of 10 malnourished boys. In intrapubertal and postpubertal boys, the tubular wall was thickened in six and these changes were independent of nutritional status. All malnourished intrapubertal and postpubertal patients demonstrated impaired spermatogenesis (versus 67% of age-matched malnourished controls), whereas similar impairment was noted in 60% with adequate nutrition versus 20% of controls. The diffuse damage of germ cells and tubules in malnourished younger boys suggests that the prepubertal male is not necessarily protected against the reproductive effects of cancer therapy.