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    Hypopharyngeal Cancer Treatment (PDQ®): Treatment - Health Professional Information [NCI] - Stage Information for Hypopharyngeal Cancer

    Table 2. Regional Lymph Nodes (N)a,b

    Oropharynx and Hypopharynx
    a Reprinted with permission from AJCC: Pharynx. In: Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 41-56.
    b Metastases at level VII are considered regional lymph node metastases.
    NX Regional lymph nodes cannot be assessed.
    N0 No regional lymph node metastasis.
    N1 Metastasis in a single ipsilateral lymph node, ≤3 cm in greatest dimension.
    N2 Metastases in a single ipsilateral lymph node, >3 cm but ≤6 cm in greatest dimension, or in multiple ipsilateral lymph nodes, none >6 cm in greatest dimension, or in bilateral or contralateral lymph nodes, none >6 cm in greatest dimension.
    N2a Metastasis in a single ipsilateral lymph node >3 cm but ≤6 cm in greatest dimension.
    N2b Metastases in multiple ipsilateral lymph nodes, none >6 cm in greatest dimension.
    N2c Metastases in bilateral or contralateral lymph nodes, none >6 cm in greatest dimension.
    N3 Metastasis in a lymph node >6 cm in greatest dimension.

    Table 3. Distant Metastasis (M)a

    a Reprinted with permission from AJCC: Pharynx. In: Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 41-56.
    M0 No distant metastasis.
    M1 Distant metastasis.
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