Expression of miR-204 and of the closely related miR-211, miR-375, and miR-9 was analyzed by real-time qRT-PCR in functional pancreatic neuroendocrine tumors (PET) of which 7 expressed insulin (Ins-F-PET), 4 glucagon or somatostatin (Gluc/Som-F-PET, 3 glucagonomas, 1 somatostatinoma), and in 7 non-functional tumors (NF-PET) (Supplementary Table S1). This evidence concerns the gene GCG and pancreatic neuroendocrine tumor.