tubular ectasia of rete testes

Tubular ectasia of rete testis represents dilated testicular mediastinal tubules.


This condition is more common in men over the age of 55 years.


This is a benign condition thought to result from the partial or complete obliteration of the efferent ducts . These spermatozoa-containing cysts communicate with the tubular system into the epididymis. It is often bilateral, is frequently associated with spermatoceles and may occur as result of a vasectomy .

Radiographic features


At sonography, it appears as multiple small cystic or tubular anechoic structures that replace and enlarge the testicular mediastinum. The geographic shape, lack of mass effect, and lack of internal vascularity (Doppler flow) are helpful to distinguish this benign condition from a partially cystic tumor.


On MR imaging, the cystic dilatation or ectasia of multiple small tubules of the rete testis appears hyperintense on T2-weighted images. After administration of gadolinium contrast, no internal enhancement is seen.​

Treatment and prognosis

It is a pathologically-benign process.

Differential diagnosis

See also