FGFR2 and Pfeiffer syndrome: Furthermore, recent reviews on FGFR2-related craniosynostosis syndromes have identified additional skeletal anomalies such as syndactyly, carpal and tarsal fusion, as well as synostosis of the radius and humerus among patients with Apert syndrome (OMIM 101200), Jackson-Weiss syndrome (OMIM 123150), and Pfeiffer syndrome (OMIM 101600), respectively [31].