Patients with stage I disease have a significantly better prognosis than those with more advanced stages. Because of the relative rarity of this disease, exact survival information based upon stage is limited.
Definitions of TNM
The American Joint Committee on Cancer has designated staging by TNM classification to define malignant mesothelioma.
International Mesothelioma Interest Group Staging System for Diffuse Malignant Pleural Mesothelioma
Table 1. Primary Tumor (T)a