A<unk>  is an accumulation of serous fluid in a body cavity. A<unk>  testis is the accumulation of fluids around a testicle. It is often caused by peritoneum wrapped around the testicle, called the tunica vaginalis. Provided there is no hernia present, it goes away without treatment in the first year. Primary<unk> s may develop in adulthood, particularly in the elderly and in hot countries, by slow accumulation of serous fluid. This is presumably caused by impaired reabsorption, which appears to be the explanation for most primary<unk> s, although the reason remains obscure. A<unk>  can also be the result of a plugged inguinal lymphatic system caused by repeated, chronic infection of Wuchereria bancrofti or Brugia malayi, two mosquito-borne parasites of Africa and Southeast Asia, respectively. As such, the condition would be a part of more diffuse sequelae commonly referred to as elephantiasis, which also affects the lymphatic system in other parts of the body.
Hydrocele
Urethrocele
Hematocele
Spermatocele
Varicocele
Pneumatocele
Cystocele
Inguinal hernia