Pleural Diffuse Malignant Mesothelioma by AJCC v9 Stage

**Semantic type:** Neoplastic Process

**Definition:** A term that refers to the staging of pleural malignant mesothelioma, following the rules of the TNM AJCC v9 classification system. This staging system applies to pleural diffuse malignant mesothelioma only. Localized pleural malignant mesothelioma, mesothelioma in situ, and other primary tumors of the pleura are not staged using this staging system. (from AJCC 9th ed.)