Because the hormone gastrin regulates several important cellular processes in the gastric epithelium including proliferation, apoptosis, migration, invasion, tissue remodeling and angiogenesis [7], we hypothesize that the unusual and extremely elevated levels of gastrin facilitated the occurrence of gastric neuroendocrine tumor in this patient [8]. This evidence concerns the gene GAST and gastric neuroendocrine tumor, well differentiated, low or intermediate grade.