IL4 and gastric cancer: The aforementioned under the hypothesis that the GCC haplotype could represent a possible increased production of IL-10 in patients with gastric cancer in our country, as reported by Mitsayasu in another population [32], and mutations reported for IL-4 and its receptor alpha chain either have increased production of this cytokine or a greater effect after its signaling, which could avoid the antitumor effector T response.