Beware the Tarlov cyst.
Hirst JE., Torode H., Sears W., Cousins MJ.
Tarlov cysts are sacral perineural cysts. This case report describes the clinical course after biopsy of a very large Tarlov cyst via laparoscopy, which was thought preoperatively to be an adnexal mass. It serves as a warning against attempting biopsy or resection of these lesions.