What Caused the Nodule in This Young Boy?

Poll

A 6-year-old boy was found to have a nodule in the right testicle. What is your diagnosis?

A 6-year-old boy was found to have a nodule in the right testicle.

Based on the image shown, what is your diagnosis?

A. Teratoma
B. Yolk sac tumor
C. Mesothelioma
D. Granulosa cell tumor, juvenile