明显的鞘膜积液，此种病变相当常见。因各种各样的炎性和肿瘤的原因，透亮液体在由浆膜围绕形成的睾丸鞘膜囊中聚集。透视检测可区别积液与真正的睾丸组织，因积液能透光，而睾丸组织不能透光。
Here is a large hydrocele of the testis. Such hydroceles are fairly common. Clear fluid accumulates in a sac of tunica vaginalis lined by a serosa with a variety of inflammatory and neoplastic conditions. A hydrocele must be distinguished from a true testicular mass, and transillumination may help, because the hydrocele will transilluminate but a testicular mass will be opaque.
