Thus, when the judgements of the mucin expressions in the gastric super-minute well-differentiated adenocarcinoma were strictly performed like as the current study, although the main route of the histogenesis of the gastric differentiated adenocarcinoma is thought to be the intestinal metaplasia-carcinoma sequence as before, it is very important that some well-differentiated adenocarcinoma may derive from the gastric native tubules with no relationship to the intestinal metaplasia. Here, MUC5AC is linked to adenocarcinoma.