Spermatocele is a fluid-filled cyst that develops at the top of the testicle of the epididymis. The fluid is usually a clear or milky white color and may contain sperm. Spermatoceles are typically filled with spermatozoa and they can vary in size from several millimeters to many centimeters. Small spermatoceles are relatively common, occurring in an estimated 30 percent of males. They are generally not painful. However, some people may experience discomfort such as a dull pain in the scrotum from larger spermatoceles. They are not cancerous, nor do they cause an increased risk of testicular cancer. Additionally, unlike varicoceles, they do not reduce fertility. History
"Spermatocele" is originally derived from the Greek term spermatos (sperm) and kele (cavity or mass). Oftentimes, "epididymal cyst" has been used interchangeably with "spermatocele." However, it is important to note their differences. Epididymal cysts may appear anywhere along or within the epididymis and do not contain sperm, whereas spermatoceles may contain sperm. Epididymal cysts have been shown to occur more frequently in children before reaching puberty. Epidemiology
Spermatoceles usually affect men who are middle-aged and can, although rarely, affect children during puberty. The incidence rate is around 5-20% for children. It is estimated that approximately 30 percent of men have been diagnosed with small spermatoceles while less have larger spermatoceles. The incidence of spermatoceles increases as men age. Before puberty, children from the male sex may develop a similar benign mass called epididymis cyst.
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