title: Extratesticular epidermoid cyst mimicking enlarged testis.
abstract: Epidermoid cysts are benign simple epithelial tumors usually appearing as hypoechoic lesions with scattered echogenic reflectors on sonography. Herein, we present a 53-year-old man with an extratesticular epidermoid cyst in the right scrotum which shows confusing sonographic findings, normal-appearing echogenicity of the lesion and atrophied testis, which lead to a diagnostic dilemma. With a variety of sonographic presentations in extratesticular epidermoid cysts, magnetic resonance (MR) imaging could play a complementary role in difficult cases.
authors.affiliation: Department of Radiology, Tri-Service General Hospital and National Defense Medical Center, 325, Cheng-Kung Rd., Sec. 2, Taipei 114, Taiwan, Republic of China.
authors.forename: H-W
authors.initials: HW
authors.lastname: Kao
authors.forename: C-J
authors.initials: CJ
authors.lastname: Wu
authors.forename: M-F
authors.initials: MF
authors.lastname: Cheng
authors.forename: W-C
authors.initials: WC
authors.lastname: Chang
authors.forename: C-Y
authors.initials: CY
authors.lastname: Chen
authors.forename: G-S
authors.initials: GS
authors.lastname: Huang
mesh_terms: D003937:Diagnosis, Differential; D004814:Epidermal Cyst / Q000000981:diagnostic imaging*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012611:Scrotum / Q000000981:diagnostic imaging; D013733:Testicular Diseases / Q000000981:diagnostic imaging*; D014463:Ultrasonography