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Fibrous dysplasia (FD) is a benign intramedullary fibro-osseous lesion. FD is a bone developmental anomaly characterized by replacement of normal bone and marrow bone by fibrous tissue. It involves any of the bones as single lesion (monostotic) or in multiple bone lesions (polyostotic) or all of the skeletal system (panostotic). Long bones are most commonly involved, which mostly identified incidentally and clinically appears asymptomatic. Clinical, radiographical and histopathological findings will help in confirming the lesion. There are many treatment option available, but still management of FD remains challenging.