[Morphologic changes in cryptorchism (author's transl)].

Histologic changes caused by malposition occur in the undescended testicle after the second year of life. Histologic changes like those seen in the human are found in experimental cryptorchism in dogs. The same pathologic changes also occur in the unilaterally descended testicle. The results of preliminary experiments in dogs allow the statement that in unilateral cryptorchism the damage to the contralateral, descended, testicle is produced by an autoimmunologic mechanism.