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Unknown primary tumor with metastasis in a single ipsilateral cervical lymph node larger than 3 cm but not larger than 6 cm in greatest dimension and ENE (extranodal extension)(-); or metastases in multiple ipsilateral cervical lymph nodes, none larger than 6 cm in greatest dimension and ENE(-); or metastases in bilateral or contralateral cervical lymph nodes, none larger than 6 cm in greatest dimension, ENE(-). (from AJCC 8th Ed.)
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