Metopism is the condition of having a persistent metopic suture. Trigonocephaly is a result from the premature closure of the metopic suture. The anterior fontanelle is where the metopic, sagittal and coronal sutures meet. Reoperations are usually performed on more severe cases (including syndromic metopic synostosis). At birth the frontal bone contains two portions, separated by the metopic (frontal) suture. Some adults have a metopic or frontal suture in the vertical portion. Aesthetic outcome of metopic synostosis surgery is persistently good with reoperation hazards below 20%. In trigonocephaly the metopic suture is prematurely fused. Hereditary relations in metopic synostosis have been found of which 5.5% were well defined syndromic. The metopic suture is also present in the frontal bone of Anzick-1. The metopic suture is situated in the medial line of the forehead. The metopic suture runs from the baby's nose to the sagittal suture. The metopic ridge can then be corrected with a (simple) burring.