Fudan University Cancer Center OT: Primary Tumor TI.t2. T3 or t4 with Tumor size Tumor size <2 cm Tumor size 2-5 cm Tumor size >5 cm Tumor extends to skin or chest increasing size of primary T2 lesion T ON: regional lymph node Lymph involvement Nodes No lymph node Metastasis to Metastasis to Metastasis to metastasis ipsilateral, ipsilateral fixed infraclavicular/ NoNI N2N3 to indicate ry,or IM supraclavicular axillary LNs LN LN or to axillary and IM progressively advancing Ns nodal disease MetastasIs MO No distant Distant LNsE Lymph Nodes: I\= Internal Mammary ●M: metastases metastasis metastasis Mo or M, according to whether there are distant metastases 复旦大学上海医学院肿瘤学系复旦大学上海医学院肿瘤学系 Fudan University Cancer Center ⚫T: Primary Tumor T1, T2, T3, or T4, with increasing size of primary lesion ⚫N: regional lymph node involvement No, N1, N2, N3 to indicate progressively advancing nodal disease ⚫M: metastases Mo or M, according to whether there are distant metastases