Pheochromocytomas are associated with genetic syndromes MEN2A, MEN2B, von-Hippel Lindau syndrome, and Neurofibromatosis type 1, which carry with them an elevated risk of developing parathyroid hyperplasia, medullary thyroid carcinoma, and mucosal neuromas. Here, RET is linked to hereditary pheochromocytoma-paraganglioma.