PSME2 and neoplasm: Kaplan-Meier analysis showed that, pathological tumor, lymph node and metastatic stage (cTNM) before NACI, pathological tumor, lymph node and metastatic stage after NACI (ypTNM), low LMP2 before NACI, low PSME1 before NACI, and low PSME2 before NACI are good prognostic factors for patients with NACI-NSCLC.