ALK and adenocarcinoma: Further, lung cancer mimicking organizing pneumonia (LCOP) was reported as a slowly progressive adenocarcinoma with a high proportion of epidermal growth factor receptor mutations, which was almost diagnosed in the early stage.[20] However, these patients with LCOP did not show ALK rearrangement, which is generally diagnosed as advanced lung cancer, as in our case.[21] Taken together, the phenotype of our patient differed from that of patients with LCOP.