In the 14 canine gastrinoma cases reported in the literature to date where serum gastrin was measured [4, 22–31], the respective concentrations ranged from 72 to 2780 ng/L (median: 519 ng/L, IQR: 370–1020 ng/L; central 95th percentile: 90–2705 ng/L). This evidence concerns the gene GAST and gastrin-producing neuroendocrine tumor.