Fig. 3
From: Testicular tumours in children: an approach to diagnosis and management with pathologic correlation
Yolk sac tumour. A 15-month-old boy with a painless swollen left testicle. a Longitudinal view of the left testis shows near-complete replacement by a hypoechoic solid mass (arrows) with a rim of normal parenchyma (arrowheads). b Power Doppler reveals increased blood flow within the tumour. c Elastography shows heterogeneous with high strain of the mass. The boy has a very high level of alphaphetoprotein and inguinal orchiectomy is practised. Yolk sac tumour is the definitive pathologic diagnosis