Rete tubular ectasia

Rete tubular ectasia, also known as cystic transformation of rete testis[1] is a benign condition, usually found in older men, involving numerous small, tubular cystic structures within the rete testis.

[1] The formation of cysts in the rete testis is associated with the obstruction of the efferent ducts, which connect the rete testis with the head of the epididymis.

The condition shares a common location with cystic dysplasia of the testis and intratesticular cysts.

Unlike cystic neoplasms, they don't present specific tumor markers.

[3] Another distinguishing feature is that tubular ectasia of the testes is confined only to the mediastinum, unlike testicular cancer such as cystic teratoma of the testis which spreads throughout the testis.