Monostotic fibrous dysplasia of the calcaneus: report of 2 cases

The authors report two unusual cases of agressive monostotic fibrous dysplasia involving the calcaneus. This lesion occurs on the 2th decade of life. The main symptom is talalgia. On plain films, diffferential diagnosis includes agressive cystic or pseudocystic lesions of the calcaneus. On MR imaging, the tumor matrix is more suggestive of the diagnosis. Treatment of this agressive form of fibrous dysplasia consists of a surgical curetage completed by cryotherapy and graft because of a high level of recurrence.