On the other hand, mucinous adenocarcinoma can be excluded and differentiated from other adenocarcinomas using the observation that 71.42% of them are related to MSH2 concentrations < 125 pg/mL and all of them are related to concentrations < 250 pg/mL in saliva samples and, respectively, 87.5% of them are related to concentrations < 100 pg/mL in whole blood samples. This evidence concerns the gene MSH2 and mucinous adenocarcinoma.