Serum IL-23A concentration as an indicator of poor prognosis in GC patients. (A) Serum concentration of IL-23A in GC patients and healthy controls. (B) Serum concentration of IL-17A in GC patients and healthy controls. (C) The correlation between IL-23A and IL-17A in serum of GC patients was accessed by linear correlation test. (D) The Kaplan–Meier curves for OS of GC patients with different expression of IL-23A.