Secondary and unspecified malignant neoplasm of intrapelvic lymph nodes

This code signifies a malignant tumor that has spread to the lymph nodes located within the pelvis, or a malignant neoplasm of these lymph nodes where the primary site is unknown. It indicates metastatic disease affecting the pelvic lymphatic system, rather than a primary cancer originating there.

Apply this code when documentation confirms metastatic cancer to the intrapelvic lymph nodes, or when a malignant neoplasm is identified in these nodes without a known primary site. This is typically used in cases of advanced cancer where regional spread to the pelvic lymphatics has occurred from a primary tumor elsewhere.

• Always attempt to code the primary malignancy first, if known, followed by this code for the secondary site.
• Distinguish between primary lymphoma of pelvic lymph nodes (which would be coded differently) and metastatic carcinoma.
• Ensure documentation specifies "intrapelvic lymph nodes" or similar anatomical precision to support this specific site.