[Tumors of cryptochid testis].

After comparing the statistics of Department of Urology of the Cochin Hospital (Paris) with international series, the author raises three questions: 1) is there a relation between the level of descent of the testicle and secondary development of carcinoma? 2(What is the incidence of orchidopexy on secondary development of carcinoma, and 3) is there a specific histology of tumors of the undescended testicle? After raising these questions, the author goes on to discuss the etiology of the tumors, and their treatment.