scroto-, scrot- +
(Latin: the pouch that holds the testes; a purse; probably a variant of scortum, "a skin, hide"; or of scrautum, "a leather bag for holding arrows"; akin to scrupus, "a sharp stone")
The fistula is an abnormal passageway in the body. The fistula may go from the body surface into a blindpouch or into an internal organ or go between two internal organs caused by disease, injury, or congenital malformation.
The epididymis 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 (the vas deferens or 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).