Which condition is characterized by premature fusion of craniofacial sutures (craniosynostosis)?

Crouzon syndrome is an autosomal dominant condition caused by mutations in the FGFR2 gene, characterized by craniosynostosis (premature fusion of cranial sutures). This results in: (1) midface hypoplasia with characteristic dish-face appearance; (2) exophthalmos (prominent eyes) due to shallow orbits; (3) hypertelorism (wide-set eyes); (4) Class III malocclusion; and (5) potential for obstructive sleep apnea. Dental manifestations include high-arched or cleft palate, crowding, and anterior open bite. Unlike Apert syndrome, Crouzon syndrome does not have digital/limb abnormalities.