Fig. 5From: Fibrous dysplasia for radiologists: beyond ground glass bone matrixThe radiographic appearance of fibrous dysplasia (FD) and the rind sign. a–e Frontal radiographs demonstrate classic FD lesions in appendicular skeleton. A classic lucent lesion surrounded by a layer of sclerotic reactive bone (so-called the rind sign). The rind sign is most commonly seen in the proximal femur (red arrow)Back to article page