In the period from January 1st 1988 to January 15th 1994 inclusive, we observed 36 patients with epididymal neoformations. In patients with a considerable oligospermia, we associated microsurgical extirpation of neoformations, with the "testis biopsy" operation, to assess eventual histologic alterations of the interstice and seminiferous tubulus. The authors show as the application of microsurgical techniques with the help of magnifying optical instruments, permits to remove these neoformations with respect to near by structures besides consenting the accurate reconstruction of structures operated and maintenance or recovery of functionality mostly in young people, where fertility recovery is obligatory.