[Reparative giant cell granuloma].

The authors report a case of voluminous giant cell reparative granuloma of the symphysis menti. They review the essential features of this lesion which was baptized by Jaffe. Although the term reparative is often contested, it refers to its real bone-forming potential. The diagnosis is most often confused with brown tumours of the parathyroid glands and cherubism. Although this lesion has a good prognosis, a full phosphorus-calcium survey including parathormone assay should be performed whenever there is doubt.