title: Must every non seminomatous testis tumor (stage I or IIa) be treated by retroperitoneal lymphodenectomy?
mesh_terms: D006801:Humans; D008197:Lymph Node Excision; D008297:Male; D009367:Neoplasm Staging; D012187:Retroperitoneal Space; D013736:Testicular Neoplasms / Q000601:surgery*