MUC5AC and mucinous adenocarcinoma: According to the histopathological variants, mucinous adenocarcinomas defined as tumors with more than 50 % of the lesion being composed of pools of extracellular mucin prevailed in S-MSI patients (18 out of 28 cases; 64 %) and were progressively less represented in LS-MSI, EO-MSS, and S-MSS (31, 13, and 7 % of the cases, respectively).