PEX7 and rhizomelic chondrodysplasia punctata: These include inherited peroxisomal disorders, often caused by mutations in one of the 14 different peroxin (PEX) genes (Berger et al., 2016) that lead to different manifestations of the Zellweger syndrome, as well as in the case of PEX7 to rhizomelic chondrodysplasia punctata (RCDP) (Waterham and Ebberink, 2012).