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The normal skull consists of several plates of bone that are separated by sutures. The sutures (fibrous joints) are found between the bony plates in the head. As the infant grows and develops, the sutures close and the bones fuse together, forming a solid piece of bone, called the skull.
Craniosynostosis is a condition in which the sutures close too early, causing problems with normal brain and skull growth. Premature closure of the sutures may also cause the pressure inside of the head to increase and the skull or facial bones to change from a normal, symmetrical appearance.
Craniosynostosis occurs in one out of 2,200 live births and affects males slightly more often than females.
Craniosynostosis is most often sporadic (occurs by chance). In some families, craniosynostosis is inherited in one of two ways:
Craniosynostosis is a feature of many different genetic syndromes that have a variety of inheritance patterns and chances for future children, depending on the specific syndrome present. It is important for the child as well as family members to be examined carefully for signs of a syndromic cause (inherited genetic disorder) of craniosynostosis such as limb defects, ear abnormalities, or cardiovascular malformations.
There are numerous types of craniosynostosis. Different names are given to the various types, depending on which suture, or sutures, are involved, including the following:
In infants with this condition, changes in the shape of the head and face may be noticeable and are generally the first and only symptom. The appearance of the child's face may not be the same when compared to the other side. Another sign is small or absent fontanelle. Less commonly, synostosis can cause increased pressure within the skull. This is especially true when multiple cranial sutures are fused prematurely. Symptoms of increased pressure in the skull include:
The symptoms of craniosynostosis may resemble other conditions or medical problems. Always consult your child's physician for a diagnosis.
Craniosynostosis may be congenital (present at birth) or may be observed later, during a physical examination. The diagnosis is made after a thorough physical examination and after diagnostic testing. During the examination, your child's physician will obtain a complete prenatal and birth history of your child. He/she may ask if there is a family history of craniosynostosis or other head/face abnormalities. Your child's physician may also ask about developmental milestones since craniosynostosis can be associated with other developmental delay. Developmental delays may require further medical follow up for underlying problems.
During the examination, a measurement of the circumference of your child's head is taken and plotted on a graph to identify normal and abnormal ranges.
Diagnostic tests that may be performed to confirm the diagnosis of craniosynostosis include:
Specific treatment for craniosynostosis will be determined by your child's physician based on:
Surgery is typically the recommended treatment, unless the cause is deformational/positional. The goal of treatment is to correct the deformities of the face and skull bones. Less commonly, surgery is needed to decrease pressure within the skull.
The optimal time to perform surgery is before the child is 1 year of age since the bones are still very soft, have not fused at other sutures, and are easy to work with. Surgery may be necessary at a much earlier age depending upon the severity of the condition. Because blood loss can be an issue in this type of surgery, surgery is often delayed in the very young child to allow some growth and development and a greater blood volume. Most procedures are done between 3 and 8 months of age.
Before surgery, your child's physician will explain the operation and may review "before and after" photographs of children who may have had a similar type of surgery.
Following the operation, it is common for the child to have a turban-like dressing around his/her head. The face and eyelids may be quite swollen, and even swollen shut, after this type of surgery. The child is typically transferred to the intensive care unit (ICU) after the operation for close monitoring.
Problems after surgery may occur suddenly or over a period of time. The child may experience any or all of the following complications:
These complications require prompt evaluation by your child's surgeon. The healthcare team educates the family after surgery on how to best care for their child at home, and outlines specific problems that require immediate medical attention.
The key to treating craniosynostosis is early detection and treatment. Some forms of craniosynostosis can affect the brain and development of a child. The degree of the problems is dependent on the severity of the craniosynostosis, the number of sutures that are fused, and the presence of brain or other organ system problems that could affect the child.
Genetic counseling may be recommended by the physician to evaluate the parents of the child for any hereditary disorders that may tend to run in families.
A child with craniosynostosis requires frequent medical evaluations to ensure that the skull, facial bones, and brain are developing normally. The medical team works with the child's family to provide education and guidance to improve the health and well being of the child.