When fluid collects in a sac anywhere along the epididymis then a cyst is formed. The cysts are usually harmless and in general do not cause any pain. Another name for an epididymal cyst is a spermatocele. In fact, numerous cysts may develop along the length of the epididymis. When this occurs the swellings feel like a small bunch of grapes.
Epididymal cysts are very common, particularly in men over the age of forty.
Sometimes only one testicle is affected, other times both testicles can have epididymal cysts present. Since these cysts are harmless, and usually small and painless, no treatment is needed for them. Sometimes the cyst will disappear of its own accord. If, however, a cyst becomes uncomfortable, which may occur if it becomes larger than usual, then it can be surgically removed. It's important that any swelling found in or around the scrotum or the testes is checked by the doctor.