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Breast Cancer StagingTNM Staging System:%u2022 T: Tumor size%u2022N: Lymph node involvement%u2022M: MetastasisStages:%u2022Stage 0: Carcinoma in situ (non-invasive)%u2022Stage I: Early-stage invasive cancer%u2022Stage II: Locally advanced cancer%u2022Stage III: Regionally advanced cancer%u2022Stage IV: Metastatic cancerImportance: Staging helps determine prognosis and guide treatment decisions

