514FIBROUS DYSPLASIA OF THE JAWS: RADIOLOGICAL REVIEW AND A REPORT OF 4 CASESFibrous dysplasia is a benign fibro-osseous disease of bone of unknown etiology. Its occurrence in the craniomaxillofacial skeleton is frequent and varies in severity from an asymptomatic monostotic lesion to polyostotic involvement resulting in progressive functional deficit and aesthetic problems. Plain film assessment of craniofacial fibrous dysplasia may be difficult because of varying appearances and complex, overlapping structures. The radiological appearance is varied because it depends on the degree of ossification of the lesions, i.e. the proportion of bone and fibrous tissue in a lesion. Here in this article we examine various radiographic appearances seen of the four cases consideredarunsubramaniam66@gmail.comResearch592014 Fibrous dysplasia,Fibro-osseous,Bone formation,RadiopacitySubramaniam Arun V,Tulsi Subramaniam,Digamber SableProfessor & Head, Dept. of Oral Medicine & Radiology, Dr.D.Y.Patil Dental College & Hospital, Pimpri, Pune, DPU, India,Professor, Dept. of Prosthodontics, Dr.D.Y.Patil Dental College & Hospital, Pimpri, Pune, DPU, India,Professor, Dept. of Oral Medicine & Radiology, Dr.D.Y.Patil Dental College & Hospital, Pimpri, Pune, India