DEAR DR. ROACH: Three weeks ago, I had to have removal of fluid that had collected around my testicles. Nearly half a liter was removed. Five days later, fluid started to build up again, and now it has filled back up. I have been checked for cancer and infection, and have neither. What is happening? What can be done now? - R.H.
ANSWER: It sounds like you have a large hydrocele, a collection of fluid around the testicle, surrounding the testis and spermatic cord. Normally these are small, but in some men they can become very large, holding up to several liters, but I have never seen one that's even as large as you are describing.