Corresponding Author: Atsuya Hikosaka, MD Department of Urology, Toyota Kosei Hospital, 500-1, Ibobara, Josui-cho, Toyota, Aichi 470-0396, Japan Tel: +81 565 43 5000 Fax: +81 565 43 5100 E-mail: uropatho@ybb.ne.jp INTRODUCTION Spermatocele, a retention cyst of the scrotum which is or has been in communication with the semen-carrying system,(1) is a relatively common clinical entity. It presents...