The phenotype of FGFR3−/− mice overlaps with that of individuals carrying a missense mutation in the tyrosine kinase domain of FGFR3 that results in camptodactyly, tall stature, and hearing loss or CATSHL syndrome (OMIM 610474) (27, 28). This evidence concerns the gene FGFR3 and Camptodactyly.