Staging of Mesothelioma

Staging of mesothelioma is based on the recommendation by the International Mesothelioma Interest Group.[6] TNM classification of the primary tumor, lymph node involvement, and distant metastasis is performed. Mesothelioma is staged Ia–IV (one-A to four) based on the TNM status.[6][7] Source: http://en.wikipedia.org/wiki/Mesothelioma#Staging