C syndrome with apparently normal development.

C syndrome is an autosomal recessive craniosynostosis syndrome with characteristic cranial, facial, palate, and joint abnormalities. All but 2 of the reported patients have had severe mental retardation. We report on an 8-month-old girl with C syndrome and apparently normal development except for tasks hindered by her lower body abnormalities. We also offer a possible explanation for the palatal configuration.