Monday, July 4, 2011

What is Metopic Synostosis (Trigonocephaly)?


The metopic suture begins at the nose and continues to the top of the skull, dividing the frontal bone into two halves.

The metopic suture is usually open at birth and fusion normally occurs in the first 12 months of life. With premature fusion of the metopic suture skull growth is restricted and the forehead will have a triangular shape and the eyes may appear closer together. This occurs somewhere between one in every 2,500 - 15,000 live births with a male to female ratio of 3:1.

The deformity can vary from mild to severe. There is usually a prominent mid-frontal ridge (pointed forehead) down the forehead that can be seen or felt and the eyebrows may appear "pinched" on either side. The eyes are usually spaced closer to each other than normal, causing a definite recognizable deformity of the forehead and eyes. When viewed from above the forehead has a triangular shape.

The only treatment for this condition is surgery on the skull. In general, a single operation is all that is necessary to treat this condition and the outcome is usually excellent.

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