Tajima et al. reported the protein expression of MUC6 in 67.3% and of MUC2 in 59.6% of the 52 cases of GOJc, and, although healthy mucosa was sampled alongside tumour, their study did not elaborate on MUC2 and MUC6 protein expression in noncancerous tissue [33]. This evidence concerns the gene MUC2 and neoplasm.