[Malignant transformation of fibrous dysplasia. About a case review of the literature].

A case of chondrosarcoma arrising from polyostotic form of fibrous dysplasia coming after 35 years is reported. About this new occurence, a review of the 61 cases of the literature is effectuated. Sarcomatous transformation is a rare complication of fibrous dysplasia. Its frequency change with the authors, because of lack of proof of the preexistence of fibrous dysplasia. She occur specially on polyostotic fibrous dysplasia. This complication is severe, death following before two years. In the literature several etiological factors are discussed: repeated X-rays, radioscopic examinations; cartilaginous nodules. In our case we means that the sarcoma arrise on a chondroblastic bone healing.