MUC1 and head and neck cancer: With regard to UICC stage, elevated MUC4 expression was referred to play a worse prognostic role in head and neck cancers (n = 1, RR = 0.56, 95% CI: 0.39-0.80, p = 0.002) than MUC1 (n = 9, RR = 0.87, 95% CI: 0.76-1.00, p = 0.052).