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A hydrocele (Br English: hydrocoele) denotes a pathological accumulation of serous fluid in a body cavity. A hydrocele testis is the accumulation of fluids around a testicle, and is fairly common. It is often caused by fluid secreted from a remnant piece of peritoneum wrapped around the testicle, called the tunica vaginalis. Provided there is no hernia present, hydrocoeles below the age of 1 year usually resolve spontaneously. Primary hydrocoeles may develop in adulthood, particularly in the elderly, particularly common in hot countries, by slow accumulation of serous fluid, presumably caused by impaired reabsorption, which appears to be the explanation for most primary hydroceles although the reason remains obscure. A hydrocele 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. ==Cause== A hydrocele can be produced in four ways: * by excessive production of fluid within the sac, e.g. secondary hydrocele. * through defective absorption of fluid * by interference with lymphatic drainage of scrotal structures as in case of elephantiasis. * by connection with a hernia of the peritoneal cavity in the congenital variety, which presents as hydrocele of the cord. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「hydrocele」の詳細全文を読む スポンサード リンク
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