MUC5AC and neoplasm: Expression level of MUC5AC was positively correlated with pN stage (P = 0.001), tumor size (P < 0.001), Fuhrman grade (P < 0.001), lymphovascular invasion (LVI; P = 0.002), sarcomatoid features (P < 0.001), rahbdoid differentiation (P = 0.001), ECOG-PS (Eastern Cooperative Oncology Group performance status, P < 0.001), tumor necrosis (P < 0.001) and recurrence (P < 0.001).