Fig. 2
From: Testicular tumours in children: an approach to diagnosis and management with pathologic correlation
Tumour and microlithiasis. A 12-year-old boy with right scrotal pain. a Longitudinal ultrasound view of the left testicle shows multiple punctuate non-shadowing echogenicities compatible with microlithiasis. b Longitudinal view of the right testicle shows besides microlithiasis, a round well-defined lesion with onion ring appearance (arrow) typically characteristic of epidermoid cyst. c Colour Doppler shows only peripheral vascularization. An intraoperative biopsy diagnoses an epidermoid cyst and a testis sparing surgery is practised