REGIONAL LYMPH NODES (N)(CLINICAL)
NX    Regional lymph nodes cannot be asssessed (e.g.,  previously
          removed)
NO    No regional lymph node metastasis
N1     Metastasis to movable  ipsilateral axillary lymph node(s)
N2     Metastasis to ipsilateral axillary lymph node(s) fiwed to
          one another or to other structures
N3     Metastasis to ipsilateral internal mammary lymph node(s)

DISTANT METASTASIS (M)
MX    Presence of distant metastasis cannot be asssessed
MO    No distant metastasis
M1     Distant metastasis (includes metastasis to ipsilateral
           supraclavicular lymph node[s])

        1989,  American Cancer Society,  Inc.

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