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Kaplan–Meier analysis of progress-free survival rates in 90 advanced thymic carcinoma patients according to (A) Masaoka stage (IIIA + IIIB: blue/IVA + IVB: green); (B) pretreatment LDH level (<190 IU/L: blue/≥190 IU/L: green); and (C) radiotherapy (yes: green/no: blue). LDH = lactate dehydrogenase, RT = radiotherapy.
