Craniofacial Syndromes: Crouzon, Apert, Pfeiffer, Saethre-Chotzen, and Carpenter Syndromes, Pierre Robin Syndrome, Hemifacial Deformity 10/4/17, 4 06 PM
Craniofacial Syndromes: Crouzon, Apert, Pfeiffer, Saethre-Chotzen, and Carpenter Syndromes, Pierre Robin Syndrome, Hemifacial Deformity 10/4/17, 406 PM Craniofacial Syndromes Updated: Feb 21, 2016 Author: Kongkrit Chaiyasate, MD, FACS; Chief Editor: Jorge I de la Torre, MD, FACS more... Crouzon, Apert, Pfeiffer, Saethre-Chotzen, and Carpenter Syndromes Crouzon Syndrome Crouzon syndrome was first described in 1912. Inheritance Inheritance is autosomal dominant with virtually complete penetrance. It is caused by multiple mutations of the fibroblast growth factor receptor 2 gene, FGFR2. [1, 2, 3] Features Features of the skull are variable. The skull may have associated brachycephaly, trigonocephaly, or oxycephaly. These occur with premature fusion of sagittal, metopic, or coronal sutures, with the coronal sutures being the most common. In addition, combinations of these deformities may be seen. [4] See the image below. http://emedicine.medscape.com/article/1280034-overview PaGe 1 of 61 Craniofacial Syndromes: Crouzon, Apert, Pfeiffer, Saethre-Chotzen, and Carpenter Syndromes, Pierre Robin Syndrome, Hemifacial Deformity 10/4/17, 406 PM Typical appearance of a patient with Crouzon syndrome, with maxillary retrusion, exorbitism, and pseudoprognathism. Anteroposterior view. View Media Gallery The orbits are shallow with resulting exorbitism, which is due to anterior positioning of the greater wing of the sphenoid. The middle cranial fossa is displaced anteriorly and inferiorly, which further shortens the orbit anteroposteriorly. The maxilla is foreshortened, causing reduction of the orbit anteroposteriorly. All these changes result in considerable reduction of orbital volume and resultant significant exorbitism. In severe cases, the lids may not close completely. The maxilla is hypoplastic in all dimensions and is retruded.