While both mesothelioma and non-small cell lung cancer (NSCLC) can present as serious respiratory illnesses, they have distinct origins. Mesothelioma is a rare cancer that arises from the lining of the lungs' pleura. https://haarisewcm695207.wikimeglio.com/10036045/differentiating_mesothelioma_and_non_small_cell_lung_cancer