<prompt> High inguinal orchiectomy for teratoma testes with involved epididymis is what stage?Stage IStage IIStage III AStage IV  <response>: ANSWER: A stage IREF: Harrisons 17th ed chapter 92Germ Cell Tumor Staging and Treatment TreatmentStageExtent of DiseaseSeminomaNonseminomaIAIBTestis only, no vascularlymphatic invasion Tl Testis only, with vascularlymphatic invasion T2, or extension through tunica albuginea T2, or involvement of spermatic cord T3 or scrotum T4Radiation therapy Radiation therapyRPLND or observation RPLNDIIANodes 2 cmRadiation therapyRPLND or chemotherapy often followed by RPLNDIIBNodes 2-5 cmRadiation therapyRPLND - adjuvant chemotherapy or chemotherapy followed by RPLND1ICNodes 5 cmChemotherapyChemotherapy, often followed by RPLNDIIIDistant metastasesChemotherapyChemotherapy, often followed by surgery biopsy or resectionNote: RPLN D retroperitoneal lymph node dissection. 