R-RPLND as First-line Treatment for Clinical Stage IIA/B Testicular Seminoma

This study is testing whether robotic-assisted surgery to remove lymph nodes in the back of the abdomen (R-RPLND) can effectively treat testicular seminoma (a type of testicular cancer) that has spread to nearby lymph nodes, as an alternative to radiation or chemotherapy. **You may be eligible if...** - You have testicular seminoma confirmed by pathology with clean surgical margins after orchiectomy (testicle removal) - Lymph nodes in your retroperitoneum (back of the abdomen) are enlarged, with at least one node ≤5cm - Your chest CT shows no spread to the lungs or elsewhere - Your tumor markers (AFP and β-hCG) are within acceptable limits - You have not had surgery for this cancer before, or you relapsed after watchful waiting **You may NOT be eligible if...** - Your lymph nodes are larger than 5cm - Cancer has spread to the chest or distant organs - Your tumor markers significantly exceed normal limits Talk to your doctor to see if this trial is right for you.