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 ...

Possible causes of one testicle being bigger than the other include epididymitis, epididymal cysts, a hydrocele, testicular torsion, and more. Treatment depends on the cause. Self-exams can help ...

Feeling a lump or bump on a testicle will make any man freak out. On this part of the body, discovering a lump out of the ordinary can be very unsettling and disturbing, to say the least. However, ...

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 ...