This is the most common type of single suture craniosynostosis. Trigonocephaly refers to a triangular cranium with a prominent vertical ridge in the midforehead. This is caused by premature closure of the metopic suture. Plagiocephaly refers to an abnormally asymmetrical cranium, which is typically flattened on one side. Caused by premature closure of the coronal suture on one side.
Brachycephaly refers to a broad skull with a short base and a recessed lower forehead.
This is caused by premature closure of the coronal suture on both sides of the head. Oxycephaly refers to a pointed skull. Turricephaly refers to a very high or towerlike skull with a vertical forehead. Primary craniosynostosis may involve one or two sutures in otherwise normal individuals or be part of a recognized syndrome. Secondary craniosynostosis occurs in response to absent or reduced growth of the brain.