MUC5AC and cancer: For example, MUC5AC expression was found by Betge et al. in 7% of 350 pMMR and in 17% of 23 dMMR cancers [17], Imai et al. in 43% of 72 pMMR and in 84% of 19 dMMR cancers [20], Arai et al. in 45% of 20 MSS and in 87% of 15 MSI cancers [16], Losi et al. in 47% of 23 pMMR and in 67% of 27 dMMR cancers [26], and Biemer-Hüttmann et al. in 28% of 47 MSS and 77% of 22 MSI tumors [18].