Fibroma of the Testicular Tunics An Unusual Extratesticular Intrascrotal Mass Elizabeth A. Sadowski, MD, Caryl G. Salomon, MD, Eva M. Wojcik, MD, David Albala, MD ibromas are rare, benign intrascrotal tumors. There are only a handful of case reports that specifically discuss these masses. 1–5 Here we present a case of fibroma of the testicular tunics and its imaging characteristics. The radiologic appearance of these tumors is variable; our goal is to familiarize the radiologist with the imaging characteristics of this clinical entity. 2–4 Received April 26, 2001, from the Departments of Radiology (E.A.S., C.G.S.), Pathology (E.M.W.), and Urology (D.A.), Loyola University Medical Center, Maywood, Illinois. Revision requested May 29, 2001. Revised manuscript accepted for publication June 25, 2001. Address correspondence and reprint requests to Caryl G. Salomon, MD, Department of Radiology, Loyola University Medical Center, 2160 S First Ave, Maywood, IL 60153. Abbreviations MRI, magnetic resonance imaging Case Report Our patient was a 26-year-old man referred for evaluation of a painless right scrotal mass noted by the patient 2 weeks earlier. There was no history of antecedent trauma or urologic symptoms. Medical and surgical histories were noncontributory. At physical examination, both testes were descended and normal in size. A 2- to 3-cm firm, nontender nodule was palpable in the right testicle. There was no palpable lymphadenopathy. Ultrasonography (Fig. 1) revealed a nearly isoechoic, mildly heterogeneous mass contiguous with the inferior pole of the right testis. The mass produced marked pos- terior acoustic shadowing suggesting a dominant fibrous tissue component. The intense shadowing precluded delineation of the border between the mass and the testi- cle. The remainder of the right testis and the epididymis were of normal echogenicity and size. Magnetic reso- nance imaging (MRI) was recommended for additional evaluation. The MRI examination (Fig. 2) revealed a well-circum- scribed 1.8-cm intrascrotal mass, the margins of which imperceptibly blended with the tunica albuginea. The mass was isointense on T1-weighted images and had a © 2001 by the American Institute of Ultrasound in Medicine • J Ultrasound Med 20:1245–1248, 2001 • 0278-4297/01/$3.50 F Case Report