The sources of ectopic growth hormone-releasing hormone (GHRH) include neuroendocrine tumors (NETs) arising from the pancreas, lung, thymus and appendix, pheochromocytomas, paragangliomas, and hypothalamic choristomas and gangliocytomas (2). The gene discussed is GHRH; the disease is hereditary pheochromocytoma-paraganglioma.