A valve defect within the veins causes the blood to back up and pool, resulting in swollen veins. Varicoceles impair semen production. This problem usually only affects one testicle, often the left testicle. Symptoms Large varicoceles produce a mass that visible through the scrotum. A physician can feel moderately sized varicoceles.
Small ones are harder to detect.
The testicle involved is often smaller than the unaffected testicle. Treatment Surgery is performed under general anesthesia, and in most cases is successful in restoring fertility. When mumps are contracted as an adult, the virus can invade one or both testicles, destroying the cells that are responsible for sperm production. Symptoms Small testicles are usually noted, high levels of FSH, and low or no sperm production. Treatment A mumps vaccine can prevent the disease and should be considered for men who did not contract mumps as a child.