Investigation of the non-size determined T4N0-2M0 non-small cell lung cancer: what is the proper T category for the tumor with additional nodules in different lobes of ipsilateral lung?

Among non-small cell lung cancer patients with different T4 descriptors, T4-add patients had the best prognosis. T4-add patients and T3 patients had similar survivals. Herein, we proposed that T4-add patients should be downstaged from T4 to T3 category. Our results served as a novel supplement to the proposals for the T category revision.