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Stage IVA includes: (Any T, N1, M0); (Any T, N0,1, M1a). N0: No regional lymph node metastasis. N1: Metastasis in anterior (perithymic) lymph nodes. M0: No distant metastasis. M1a: Separate pleural or pericardial nodule(s). (AJCC 8th ed.)
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