An epididymal cyst is a fluid filled benign cyst that arises from the epididymis. The epididymis is a structure located behind and on top of the testicle.
The epididymis is one long coiled tube in which sperm matures. Epididymal cysts are often discovered when about the size of a pea. Often they are asymptomatic but for some men they may cause pain. The cyst can also slowly increase in size and cause other non-specific symptoms.
Epididymal cyst usually develops in adult men. They are rare in children but when they do occur, usually present around puberty. It is difficult to study how common epididymal cysts are, however, in as many as 30% of men presenting for scrotal ultrasound, cystic lesions are found in the epididymis.
Excising an epididymal cyst is done as a day procedure. A general anaesthetic is used for this procedure. The stitches that are used to close the scrotal wound are usually absorbable (do not need to be removed).