Additionally, it is important to evaluate for the presence of Von–Hippel Lindau disease (VHL), neurofibromatosis-1(NF-1), and rearranged during transfection (RET) in cases of suspected pheochromocytomas and succinate dehydrogenase complex subunits (SDHD, SDHB, SDHC) gene mutations in paragangliomas. The gene discussed is NF1; the disease is pheochromocytoma.