Cystic dysplasia of the testis: a rare cause of painless hemiscrotal enlargement in childhood.

Cystic dysplasia of the testis is a rare, benign cause of painless hemiscrotal enlargement in children. We present two cases of cystic dysplasia of the testis presenting with scrotal enlargement. The diagnosis was based on its specific sonographic findings and on the coexistence of a multicystic dysplastic kidney in one case.