What characterizes a spermatocele?

A spermatocele is specifically defined as a retention cyst that forms in the epididymis and contains spermatozoa. These cysts are usually filled with a milky or clear fluid and are typically located above the testis. Spermatocele can develop as a result of a blockage in the epididymis, preventing the normal drainage of fluids.

The presence of spermatozoa in the cyst is a key characteristic that differentiates a spermatocele from other types of cysts or conditions that can occur in the scrotal area. They are generally painless and often found incidentally during physical examinations, with many men experiencing no associated symptoms or complications.

This understanding is crucial for differentiating spermatocele from other conditions such as hydrocele or varicocele, which have different characteristics and implications for treatment.