• A hydrocele testis is the accumulation of fluids around a testicle, and is fairly common. It may be treated surgically. It can occur in infants undergoing peritoneal dialysis. A hydrocele testis is due to fluid secreted from a remnant piece of peritoneum wrapped around the testis called the tunica vaginalis. It can also be as a result of cancer, trauma (such as a hernia), or orchitis. It can also be the result of a plugged inguinal lymphatic system caused by repeated chronic infection of Wucheria bancrofti or Brugia malayi, two mosquito-borne parasites of Africa and S.E. Asia, respectively. As such the condition would be a part of more diffuse sequelae commonly referred to as elephantiasis.
• Another region which can have a hydrocele is the canal of Nuck.

References