Figure 4

Variations in CT appearance of fibrous dysplasia based on age. A) FD in the young patient most often appears as homogenous, radio-dense lesions often described as having a ground glass appearance on CT. B) As these patients enter adolescence, the FD lesions progress to a mixed appearance which stabilizes in adulthood (C) but does not necessarily resume a homogenous appearance. This may explain the numerous radiographic descriptions of FD in the literature such as “ground-glass”, “pagetoid”, “lytic”, and “cystic”.