Testicular epidermoid cyst - Ultrasound and MR typical findings with macroscopy correlation.

Figure 1 a. Longitudinal US image of the right testis show a bilobulated mass in the upper medial aspect of the testis. The mass had sharp margins, composed of a central echogenic area and of alternating hyperechogenic and hypoechogenic rings in the periphery (onionskin sign), measuring 2.4 x 1.7 x 1.7 cm. b. Longitudinal Doppler-US image of the right testis demonstrates the absence of vascularization of the mass. Ultrasound (US) revealed a solid mass in the upper pole of the right testis that was well circumscribed, avascular, and displayed the onionskin appearance suggestive of testicular epidermoid cyst (1,2) (Figure-1). Magnetic resonance (MR) confirmed the well-circumscribed intra-testicular mass with a