Fig. 1

A MRI revealed a mass in the right testis (red arrow). B The tumor showed limited infiltration into the surrounding testicular tissue and displayed nested or sheet-like architecture separated by delicate fibrovascular septa. C Epithelioid tumor cells exhibited marked nuclear atypia and pleomorphism, with abundant clear to granular epsinophilic cytoplasm. D Multinucleate giant tumour cell with melanin pigment (red arrow). E Spider-like tumour cell (red arrow). F The tumor cells had clear-to-granular cytoplasm, distinct cell borders and round or oval nuclei with small visible nucleoli