Institue of Sport and Exercise Health
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Fibrous dysplasia is an abnormal condition of bone which can affect any of the bones in the body.  When this involves the skull, this can solely involve the skull bone or be associated with other bones in the body.  It is characterised by replacement of the normal bony architecture by abnormal bone which invariably leads to thickening of the bone.  It is not a tumour  but due to thickening of the bone, it can produce certain issues, particularly when it involves the skull.  These vary from affecting the cosmetic appearance of the contours of the skull, through to narrowing of the bony channels through the skull which convey nerves such as the optic nerve for vision. 

Fibrous dysplasia can be diagnosed as an incidental finding when it is very minor.  If this is the case then almost certainly we will advise you that nothing further is required beyond simple monitoring.  In those more extensive cases, this monitoring can involve surveillance of your vision to ensure that this is not affected. 

Fibrous dysplasia tends to be more active in people in their teens and twenties and will largely stop progressing by the age of 30. 

It is very rare any surgical treatment needs to be considered for fibrous dysplasia.  However, surgical options that may be considered are dealt with in the fibrous dysplasia treatment section.