Tunica vaginalis cyst is a type of benign paratesticular cystic lesion. It is a cyst that arises from the tunica vaginalis and, in conjunction with tunica albuginea cysts, they are collectively termed scrotal tunica cysts.
Their exact cause is unknown, although history of trauma, hemorrhage and/or infection may be present.
On microscopic analysis, they are lined by non-ciliated cuboidal cells, and they contain serous fluid and cellular debris.
They are typically seen as a small (2-5 mm) anechoic uni-or multilocular cystic lesion within the layers of the tunica vaginalis. Larger cysts can cause compression the testicular parenchyma and simulate an intratesticular lesion. Some cysts may have low-level echoes and/or calcification.
For ultrasound appearances consider
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- 2. Bostwick D, Cheng L. Urologic Surgical Pathology: Expert Consult - Online and Print, 3e. Saunders. ISBN:1455743275. Read it at Google Books - Find it at Amazon