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 (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.

There are acne cysts, arachnoid cysts, Baker’s cysts (or popliteal cyst), Bartholin’s cysts, breast cysts, chalazion cysts, colloid cysts, dentigerous cysts, dermoid cysts, epididymal cysts, ganglion ...

WE have observed certain definite changes in the testes of some inbred hamsters. These changes are characterized by a striking testicular hypoplasia, mostly bilateral. Such testes, represented ...