Figure 9c. Sagittal synostosis in a neonate. (a) Lateral skull radiograph shows anteroposterior elongation of the cranium (scaphocephaly). (b) Frontal skull radiograph shows that the fused sagittal suture is sclerotic and "heaped up." (c) Photograph obtained during surgical exposure shows the prominent posterior sagittal ridge (arrowheads) along the line of closure.