Hypochondroplasia (HCH, MIM #146000) is the mildest form of fibroblast growth factor receptor 3 (FGFR3) chondrodysplasia group with an incidence of about 1 in 50,000.[1,2] It is inherited in an autosomal dominant manner. This evidence concerns the gene FGFR3 and chondrodysplasia.