Disease with characteristics of craniosynostosis and facial hypoplasia. Craniosynostosis is variable but many sutures are usually involved. Facial anomalies include ocular hypertelorism, small beaked nose, proptosis, exophthalmos, hypoplastic maxilla and mandibular prognathism. Caused by mutations of the fibroblast growth factor receptor FGFR2 (10q25.3-q26) with 80% being located to the immunoglobulin (Ig)-like domain III (IgIII domain) of the extracellular region and an additional 20% of mutations being located in the IgI-IgII domains, transmembrane and tyrosine kinase regions. The disease is transmitted in an autosomal dominant manner with variable penetrance.