[Morphological findings in cryptorchism in the adult male].

Cryptorchidism, the most common endocrine disturbance in the newborn, is still present in 0.3% of all postpubertal men as monolateral or bilateral condition. The undescended testis, in postpubertal age, is permanently damaged, so about 80% of cryptorchids are subfertile or definitively sterile. In the present study we relate our observations on structure and ultrastructure of testicular biopsies obtained from 29 cryptorchid men aged from 16 to 64. The individual pattern of morphological alterations is closely related to age and position of undescended testis. The following aspects are recognizable in cryptorchid testis: 1) seminiferous tubules reduced in size and irregular in shape; 2) tubular lumen occluded; 3) reduced germ cell population; 4) altered stages of spermatogenesis; 5) increased thickness of spermatogonia layer; 6) vacuolization of germ cells; 7) polynucleated germ cells; 8) acrosomal deformities; 9) delivery of immature germ cells; 10) Sertolisation of the seminiferous tubule; 11) immature Sertoli cells; 12) multilayered and thickened basement lamina; 13) peritubular fibrosis; 14) vascular fibrosis; 15) vacuolisation of Leydig cells; 16) interstitial mastocytosis. The findings present a mosaic of the morphological events, that are characteristic not only of the undescended testis but also of numerous testicular pathologies as well as of other conditions as prolonged hyperthermia, experimental ischaemia and senescence.