Focal bone tumors of mesenchymal origin

Abstract

This paper will review the main features of focal lesions with a benign characteristic involving bone and with a mesenchymal origin. It includes bone cyst, fibrous dysplasia, osteofibrosus dysplasia, intraosseous lipoma, Langerhans cell histiocytosis and desmoplastic fibroma of bone; the latter according the WHO Classification of tumors of bone belong respectively to hematopoietic and fibrogenic lesions of bone. However, we included they in this paper for the overall benign nature of these lesions and the possible differential diagnosis.