A spermatocele (also called a spermatic or epididymal cyst) is a fluid-filled sac that grows in the epididymis -- a tightly coiled tube about 20 feet long where the sperm matures as it passes through.

A spermatocele is a fluid-filled sac or cyst. It develops on the epididymis, the small tube that stores and transports semen from the testicles. It may feel like a hard, painless lump or there may be ...

A spermatocele is an often pain-free benign cyst that occurs close to a testicle. It may also be known as a spermatic or epididymal cyst. The cyst forms in the epididymis. The epididymis is a coiled ...