Sec and unsp malig neoplasm of axilla and upper limb nodes

This code signifies the presence of metastatic cancer in the lymph nodes located in the armpit (axilla) or anywhere along the upper extremity. It indicates that the primary tumor originated elsewhere in the body and has spread to these regional lymph nodes.

Apply this code when documentation confirms a secondary malignant neoplasm affecting the axillary or upper limb lymph nodes, and the primary site is either unknown or explicitly stated as metastatic to these nodes. This is appropriate when pathology reports or imaging studies confirm nodal involvement without identifying the original cancer site in the same documentation.

• Always attempt to code the primary malignant neoplasm first, if known and still active.
• Use this code when the documentation specifies "metastatic to axillary lymph nodes" or "secondary malignancy of upper limb lymph nodes" without identifying the primary site in the same record.
• Distinguish carefully from codes for primary lymph node malignancies (e.g., lymphomas) or benign lymphadenopathy.