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://orlandosuku449139.wikirecognition.com/1713191/mesothelioma_vs_non_small_cell_lung_cancer_understanding_the_difference