Scaphocephaly is a type of cephalic disorder which occurs when there is a premature fusion of the sagittal suture. The sagittal suture joins together the two parietal bones of skull. Scaphocephaly is the most common craniosynostosis condition and is characterized by a long, narrow head. Usually there is no negative effect on the development of the brain. This condition can only be corrected surgically in young children (age 6 months to 1 year).