ecrin-mdr-crcClinical2017pT1 colorectal cancerPt1 Colorectal CancerObservationalhttps://newmdr.ecrin.org/Study/2657557Japan9ECRIN MDRActive, not recruitingfalseEstablishment of Optimal Risk Assessment of Lymph Node Metastasis in T1 Colorectal Cancer by the Japanese Society for Cancer of the Colon and Rectum (JSCCR)Primary outcome(s): Calculation tools of lymph node metastatic risk using Nomogram in pT1 colorectal cancer2017-09-152657557JPRN-UMIN000042910