This type of craniosynostosis may be confused with Crouzon syndrome. A child with this syndrome has a head that is taller than normal and flat in the front and back; bulging eyes (which can be severe or minor); indented midface that causes the lower jaw to be unusually prominent; crowding of the teeth and a high, arched palate. Some children may have unusually broad thumbs and big toes. (This is sometimes used to distinguish the condition from Crouzon syndrome.) Some have partial syndactyly between the first and second toes and fingers. Children with this syndrome usually have normal intelligence.