Non ossifying fibroma of the mandible. A common lesion with unusual location.

A first case of non-ossifying fibroma located in the mandibular condyle of a 20-year-old male is presented. Radiologic and histologic findings correspond in all details to those of non-ossifying fibromas of long tubular bones. The lesion's location within the condylar growth zone may strengthen the hypothesis that non-ossifying fibromas are disturbances in growth rather than true neoplasms.