DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Swollen testicles. Close-up of the swollen scrotum of an 89-year-old male patient with a large hydrocele. A hydrocele testis is an accumulation of fluid within the internal membranes (tunica vaginalis) of a testicle. It may be caused by injury or infection.
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