Source:http://linkedlifedata.com/resource/umls/id/C0862402
NCI: Stage II includes: (T2a, N0, M0); (T2b, N0, M0). T2a: Tumor invades superficial muscle (inner half). T2b: Tumor invades deep muscle (outer half). N0: No regional lymph node metastasis. M0: No distant metastasis. (AJCC 6th and 7th Eds.)