PMC4897973_01
13-year-old boy with epidermoid cyst of the testicle. A, Longitudinal ultrasound of the left testis demonstrates a well circumscribed heterogeneous mass with a nonshadowing hyperechoic focus in the periphery (arrow) which may represent fat or microscopic calcification. Portions of the mass have a lamellated appearance with concentric rings of alternating echogenicity. B, Color Doppler image through another portion of the mass shows no vascular flow within the lesion.
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Testicular ultrasound (Fig. 1) revealed a circumscribed, heterogeneous, predominantly hypoechoic mass in the left testis.
13-year-old boy with epidermoid cyst of the testicle. Photomicrograph of resected cyst demonstrates keratinized material within the lumen (*). The cyst is lined by squamous epithelium (arrow). Normal seminiferous tubules can also be identified (arrow heads). (Hematoxylin-Eosin, original magnification x 100).
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Microscopic analysis revealed normal testicular parenchyma with an area of squamous epithelium and fragments of sloughed keratin (Fig. 2).