Stage IIA

Invasive cancer more extensive than stage I, usually involving local lymph nodes without spread to distant anatomic sites. The definition of stage IIA depends on the particular type of cancer that it refers to; for example, for breast cancer, stage IIA is defined as follows: (T0, N1, M0); (T1, N1, M0); (T2, N0, M0). T0: No evidence of primary tumor. T1: Tumor 20 mm or less in greatest dimension. T1 includes T1mi. T1mi: Tumor 1 mm or less in greatest dimension. T2: Tumor more than 20 mm but not more than 50 mm in greatest dimension. N1: Metastasis to movable ipsilateral level I, II axillary lymph node(s). N0: No regional lymph node metastasis. M0: No clinical or radiographic evidence of distant metastasis. M0 includes M0(i+); for bone cancer, stage IIA is defined as follows: T1, N0, M0, G3, G4. T1: Tumor 8 cm or less in greatest dimension. N0: No regional lymph node metastasis. M0: No distant metastasis. G3: Poorly differentiated. G4: Undifferentiated. (partially adapted from AJCC 7th ed.) (NCI Thesaurus)

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