The syndromes associated with pheochromocytomas are multiple endocrine neoplasia 2 (MEN 2A and MEN 2B) linked to RET gene mutations, von Hippel–Lindau syndrome due to VHL gene mutations and neurofibromatosis type 1 associated with NF1 gene mutations. Here, RET is linked to hereditary pheochromocytoma-paraganglioma.