What impact did an undescended testicle have on this young man’s risk for developing testicular cancer?

What impact did an undescended testicle have on this young man’s risk for developing
testicular cancer?
2. What might be the side effects of cytotoxic chemotherapy?
3. What was the purpose of preserving his sperm before chemotherapy?
4. Is this young man’s age typical for the development of testicular carcinoma?