Source:http://linkedlifedata.com/resource/umls/id/C2981370
NCI: Stage IA includes: T1, N0, M0, G1-2, X. T1: Tumor invades lamina propria, muscularis mucosae, or submucosa. N0: No regional lymph node metastasis. M0: No distant metastasis. G1: Well differentiated. G2: Moderately differentiated. GX: Grade cannot be assessed-stage grouping as G1. (AJCC 7th ed.)