<unk>  is a mass of enlarged veins that develops in the spermatic cord, which leads from the testicles (testes ) up through a passageway in the lower abdominal wall (systeminguinal canal) to the circulatory system. The spermatic cord is made up of blood vessels, lymphatic vessels, nerves, and the duct that carries sperm from the body (vas deferens). If the valves that regulate bloodflow from these veins become defective, blood does not circulate out of the testicles efficiently, which causes swelling in the veins above and behind the testicles.
A<unk>  can develop in one testicle or both, but in about 85% of cases it develops in the left testicle. The left spermatic vein drains into the renal vein between the superior mesenteric artery and the aorta; these two arteries can compress the renal vein and thus impede bloodflow from the spermatic vein. The right spermatic vein drains into the vein that returns blood to the heart (vena cava) and develops<unk>  less often. A one-sided (unilateral)<unk>  can affect either testicle.
Because of the impaired circulation of blood created by a<unk> , the blood does not cool as it does normally. The increased temperature of the blood raises the temperature of the testes, which is believed to contribute to infertility, as heat can damage or destroy sperm. The increased temperature may also impede production of new, healthy sperm.
Varicoscele
Varicocele
Pneumatocele
Hydrocele
Inguinal hernia
Obturator hernia
Incisional hernia
Internal hernia