Metopic ridge
A metopic ridge is an abnormal shape of the skull. The ridge can be seen on the forehead.
A metopic ridge is a ridge of bone or suture line on the forehead between the two halves of the frontal bone. The ridging is caused when the two halves close prematurely.
The physical landmarks of the human face are very similar from one face to another.
Considerations
The skull of an infant is made up of bony plates. The gaps between the plates allow for growth of the skull. The places where these plates connect are called sutures or suture lines. They do not fully close until the 2nd or 3rd year of life.
A metopic ridge occurs when the 2 bony plates in the front part of the skull join together too early.
The metopic suture remains unclosed throughout life in 1 in 10 people.
Causes
A birth defect called craniosynostosis is a common cause of metopic ridge. It can also be associated with other congenital skeletal defects.
When to Contact a Medical Professional
Contact your health care provider if you notice a ridge along your infant's forehead or a ridge forming on the skull.
The provider will perform a physical exam and ask questions about the child's medical history.
Tests may include:
- Head CT scan
- Skull x-ray
A metopic ridge must be differentiated from metopic synostosis, which is a more serious condition. Parents can find information and support at
No treatment or surgery is needed for a metopic ridge if it is the only skull abnormality.
References
Craniosynostosis and Positional Plagiocephaly Support (CAPPS) website. The metopic ridge / benign or surgical?
Gerety PA, Taylor JA, Bartlett SP. Nonsyndromic craniosynostosis. In: Rodriguez ED, Losee JE, Neligan PC, eds. Plastic Surgery: Volume 3: Craniofacial, Head and Neck Surgery and Pediatric Plastic Surgery. 4th ed. Philadelphia, PA: Elsevier; 2018:chap 32.
Jha RT, Magge SN, Keating RF. Diagnosis and surgical options for craniosynostosis. In: Ellenbogen RG, Sekhar LN, Kitchen ND, da Silva HB, eds. Principles of Neurological Surgery. 4th ed. Philadelphia, PA: Elsevier; 2018:chap 9.
Kinsman SL, Johnston MV. Congenital anomalies of the central nervous system. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 609.
Version Info
Last reviewed on: 12/9/2021
Reviewed by: Franklin W. Lusby, MD, Ophthalmologist, Lusby Vision Institute, La Jolla, CA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
