Consistent with previously published findings, genes with significantly elevated expression in islet cell tumors included insulinoma-associated 1 (INSM1), glutaminyl-peptide cyclotransferase (QPCT), fibrinogen B beta polypeptide (FGB), peroxisomal biogenesis factor 7 (PEX7). The gene discussed is QPCT; the disease is pancreatic neuroendocrine tumor.