Dursun et al. reported that among 606 gallbladder carcinomas, 40 cases (6.6 %) showed some degree of mucin production, and only 15 cases (2.5 %) were qualified as mucinous adenocarcinoma, with 3 cases associated with ICPN [3]. This evidence concerns the gene MUC5AC and colon mucinous adenocarcinoma.