TMEM127 and neurofibromatosis: Besides the three classical PHEO-associated cancer syndromes, namely, multiple endocrine neoplasia type 2 (MEN2), von Hippel-Lindau (VHL) disease, and neurofibromatosis type 1 (NF1), new entities have been associated with PHEO: the PGL syndrome types 1 to 5 [(PGL1–5) caused by mutations in succinate dehydrogenase (SDH) subunits D/AF2/C/B/A genes (SDHx), resp.], familial PHEO [caused by mutations in Myc-associated protein X (MAX) and transmembrane protein 127 (TMEM127) genes] [6–15], and several new susceptibility genes.