an abnormal sac (cyst) that develops in the epididymis — the small, coiled tube located on the upper testicle that collects and transports sperm. Generally painless and noncancerous, a spermatocele usually is filled with milky or clear fluid that may contain sperm. The exact cause of spermatoceles is unknown but may be due to a blockage in one of the tubes that drains sperm. Spermatoceles, sometimes called spermatic cysts, are common. They typically don t reduce fertility or require treatment. If a spermatocele grows large enough to cause discomfort, your doctor may suggest surgery. Hi there, Thanks for your query. The condition is called Spermatocele- an abnormal sac (cyst) that develops in the epididymis and contains milky or clear fluid with sperms. It is usually painless. It is usually formed due to blockage of the tube. A gentle, daily massage will reopen the passage for the fluid to flow out. There is nothing to worry about. but if it enlarges significantly and causes discomfort, the doctor will evacuate the epididymis contents. If you find my response helpful and informative, do not forget an “excellent” (5-star rating) to my answer, to ENCOURAGE ALL doctors- engaged in social service- to render sound advice to the FREE queries. Take care Dr. Rakesh Karanwal