Adenomatoid tumor of Epididymis

Paratesticular tumors are uncommon and comprise less than 5% of all intrascrotal tumors; up to 80% of paratesticular tumors are benign.[1] Epididymal epithelial tumors are a rare subtype of paratesticular tumors with the adenomatoid tumor being most common followed by the papillary cystadenoma and the leiomyoma.[2,5] Adenomatoid tumors are benign tumors of both the female and male genital tracts. In males, studies have shown the epididymis to be the most common location.[4] These tumors are usually asymptomatic and are found by the patient or physician on physical examination as a non-painful intrascrotal mass. The mean age at diagnosis is 36. Most adenomatoid tumors of the epididymis are less than 2 cm in diameter although can range from 0.4 to 5.0 cm in size.[5] They are found most commonly in the tail of the epididymis. Histological examination of adenomatoid tumors may demonstrate an infiltrative appearance, but there have been no case reports of adenomatoid tumors of the epididymis metastasizing. Surgical excision is curative. If the tumor?s boundaries are well defined then removal of the tumor may be possible, otherwise a partial epdidymectomy will be necessary.[1]

Ultrasound examination demonstrates well circumscribed uniformly hypoechoic mass. These masses are usually hypovascular but color flow Doppler imaging may demonstrate blood within them sometimes [6]