Malignant neoplasm of posterior mediastinum

This code signifies a cancerous tumor originating in the posterior mediastinum, the anatomical space located behind the heart and great vessels, anterior to the vertebral column. These neoplasms can arise from various tissues within this region, including nerves, lymph nodes, or connective tissue. The diagnosis indicates a primary malignant process rather than a metastatic spread from another site.

Assign this code when documentation clearly identifies a primary malignant neoplasm located specifically in the posterior mediastinum. This diagnosis is typically confirmed through imaging studies (e.g., CT, MRI) and biopsy. Use this code when the pathology report confirms malignancy and specifies the posterior mediastinal location.

• Always confirm the primary nature of the tumor; do not use for metastatic lesions to the posterior mediastinum.
• Distinguish from anterior or middle mediastinal malignancies, which have different code assignments.
• Ensure the documentation specifies "posterior mediastinum" and not just "mediastinum, unspecified" to support this specific code.