People with testicles may get a condition known as epididymitis, which can cause pain and swelling in the testicles. The condition usually improves with antibiotics. Share on Pinterest twomeows/Getty ...
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.