The total length of the epididymis is usually 6-7 cm in length but it is tightly coiled and would measure 6 m if uncoiled 3..
epididymal head: round or oblong structure located near the superior pole of the testicle
isoechoic or mildly hyperechoic relative to the testicle
measures 5-12 mm
US in the sagittal plane through head of the epididymis shows a normal sized epididymis measuring 1 X .6 cms Ashley Davidoff MD 133423 US in the transverse plane through the head of the right epididymis in a 24 year old male shows arrow shaped normal head of the epididymis . The normal distal aspect of the spermatic cord surrounding the epididymis is noted medially Ashley Davidoff MD 133516
epididymal body: extends down the posterior aspect of the testicle
measures 2-4 mm
epididymal tail: curved structure at the inferior pole of the testicle and becomes the proximal ductus deferens
measures 2-5 mm
Epididymis and Torsion
Doppler US in the sagittal plane through testes shows absent blood flow to the right testis associated with swelling of the epididymis and small hydrocele. Surgically proven torsion of the testis Ashley Davidoff MD 133756 Doppler US in the transverse plane through both testes in an 18-year-old male presenting with acute pain shows no flow to the swollen right testis consistent with torsion Ashley Davidoff MD 133752
