Tubular ectasia of rete testis
Tubular ectasia of rete testis represents dilated testicular mediastinal tubules.
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Epidemiology
This condition is more common in men over the age of 55 years.
Pathology
This is a benign condition thought to result from the partial or complete obliteration of the efferent ducts 7. 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 2.
Radiographic features
Ultrasound
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.
MRI
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 3.
Differential diagnosis
-
intratesticular varicocele
- demonstrates flow on color Doppler
- cystadenoma of the rete testis
See also
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testicular and scrotal ultrasound
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unilateral testicular lesion
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germ cell tumors of the testis
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non seminomatous germ cell tumors
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- tubular ectasia of the rete testis
- cystadenoma of the rete testis
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unilateral testicular lesion