Stage IA includes: pT1, N0, M0, S0. pT1: Testicular cancer which is limited to testis (including rete testis invasion) without lymphovascular invasion. N0: Testicular cancer with no regional lymph node metastasis. M0: Testicular cancer without evidence of distant metastasis. S0: Marker study levels within normal limits. (AJCC 8th ed.) [from NCI]