Apert syndrome is a rare genetic condition that can cause the skull to grow abnormally. While in utero, a baby's skull can fuse prematurely, causing the face and head to change shape. Babies born with Apert syndrome may also have fingers or toes fused together. This condition is called syndactyly.
Apert syndrome is caused by a rare gene mutation that leads the bones in the skull to fuse together abnormally. In its regular form, this gene allows the skull to form, but when it mutates, the bones do not fuse together at the correct time in development. The mutated gene is called the fibroblast growth receptor gene 2. It tells the body to start forming bones when it is not time to do so.
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