The surgical removal of the epididymis which is a structure within the scrotum attached to the backside of the testis.

The epididymis is a coiled segment of the spermatic ducts that serves to store, mature and transport spermatozoa between the testis and the vas deferens.

The vas deferens is the tube connecting the testes with the urethra which is a coiled duct that conveys sperm from the epididymis to the ejaculatory duct and the urethra.