A 16-year-old African American male is noted to have what appeared to be a painless cystic mass at the head of his epididymis. It is clearly differentiated from the testicle and transilluminated on...

A 16-year-old African American male is noted to have what appeared to be a painless cystic mass at the head of his epididymis. It is clearly differentiated from the testicle and transilluminated on exam. What is the most likely diagnosis?

A. Cystocele

B. Varicocele