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A, Membrane c-kit positive staining, ×40 original magnification. B, c-kit negative staining, ×40 original magnification. C, Kaplan-Meier plot for disease-related survival of patients positive or negative for c-kit expression. D, Progression-free survival related to c-kit expression. E, Disease-related survival of thymoma and thymic carcinoma patients. F, Progression-free survival of thymoma and thymic carcinoma patients.
