This is Episode 20: Testicular Stage II Seminoma, NSGCT, and Field Design. Last episode, we built the foundation: markers, orchiectomy, staging, and why surveillance is preferred for most stage I seminoma. Today we move into stage II disease, where the question is no longer just whether you know the basics. The question is whether you can choose treatment, explain why, and, if needed, describe a radiation field clearly and defensibly.