Cystic dysplasia of the testis: sonographic diagnosis and differentiation from testicular microlithiasis

Cystic dysplasia of the testis is an uncommon benign cause of an intratesti cular mass in children. It is often associated with renal abnormalities, wh ich reflects the close developmental association between the kidneys and te stes. The diagnosis is usually suspected based on sonographic findings. We present a case of cystic dysplasia of the testis occurring in a boy with a multicystic dysplastic kidney, in whom the sonographic findings were initia lly misinterpreted as testicular microlithiasis.