DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Epididymal cyst . Close-up of an epididymal cyst affecting the left testicle (right) of a 70-year-old male patient with a penile pump. An epididymal cyst is a harmless fluid-filled sac that forms on the epididymis, a sperm carrying tube that lies on the testicle. A penile pump is a prosthesis used for the treatment of erectile dysfunction.
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