Source:http://linkedlifedata.com/resource/umls/id/C2981627
NCI: Stage IVA includes: (T4, N0, M0); (Any T, N1, M0). T4: Tumor with periductal invasion. N0: No regional lymph node metastasis. N1: Regional lymph node metastasis. M0: No distant metastasis. (from AJCC 7th Ed.)