title: Testicular cancer risk in boys with maldescended testis: a cohort study.
abstract: Testicular maldescent is considered as a predisposing condition for development of testicular malignancy. Male subjects with a history of cryptorchidism have been suggested by some authors to have a 40 to 50 times increased risk of testis cancer. However, the magnitude of this risk is a point of considerable disagreement. Therefore, we studied the records of 506 consecutive patients hospitalized for maldescended testis from January 1949 to December 1960. Testis cancer developed in 6 patients, which when compared to the 1.3 expectant Danish incidence rate, yielded a statistically significant relative risk of 4.7 (95 per cent confidence interval 1.7 to 10.2). Thus, our study confirmed that male subjects with a history of testicular maldescent have an increased risk for testis cancer, although the magnitude of this risk was lower than suggested previously.
mesh_terms: D000328:Adult; D002648:Child; D006063:Chorionic Gonadotropin / Q000627:therapeutic use; D003456:Cryptorchidism / Q000150:complications* / Q000628:therapy; D003718:Denmark; D004407:Dysgerminoma / Q000453:epidemiology / Q000209:etiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009373:Neoplasms, Germ Cell and Embryonal / Q000453:epidemiology / Q000209:etiology; D012189:Retrospective Studies; D012307:Risk Factors; D013736:Testicular Neoplasms / Q000453:epidemiology* / Q000209:etiology; D013737:Testis / Q000601:surgery
chemical_list: D006063:Chorionic Gonadotropin