Malignant neoplasm of left broad ligament

This code signifies a primary cancerous tumor originating in the left broad ligament, a peritoneal fold extending from the lateral uterus to the pelvic sidewall. This malignancy is typically a type of sarcoma or carcinoma, distinct from uterine or ovarian primary cancers.

Apply this code when documentation confirms a primary malignant neoplasm specifically located in the left broad ligament. This diagnosis is often established through biopsy and histopathological examination, distinguishing it from metastatic disease or benign growths.

• Ensure the laterality is explicitly documented as "left"; if unspecified, query the provider.
• Distinguish this primary site from malignancies of the uterus (C54.-) or ovary (C56.-), even if they are in close proximity.
• Code any associated metastatic sites separately, following the primary diagnosis.