Secondary and unsp malignant neoplasm of intrapelv nodes

This code signifies the presence of a malignant tumor that has metastasized to lymph nodes located within the pelvic cavity. It indicates that the primary cancer originated elsewhere in the body and has spread to these intrapelvic lymphatic structures. This diagnosis is distinct from a primary cancer originating directly in the lymph nodes.

Apply this code when documentation clearly states secondary or metastatic malignancy affecting lymph nodes within the pelvis (e.g., iliac, obturator, sacral lymph nodes). This is appropriate when the primary site of the malignancy is known or when the malignancy is described as "unspecified secondary" to intrapelvic lymph nodes. Supporting documentation includes pathology reports confirming metastatic disease in pelvic lymph nodes, imaging studies showing pelvic lymphadenopathy with a known primary, or physician notes explicitly stating secondary intrapelvic lymph node involvement.

• Always sequence the primary malignancy code before this secondary site code, if known.
• Distinguish carefully between primary lymph node malignancy (e.g., lymphoma) and secondary metastatic involvement.
• Ensure documentation specifies "intrapelvic" lymph nodes; otherwise, a more general secondary lymph node code may be appropriate.