Dysplasie fibreuse polyostotique symptomatique du rachis dorsal

Fibrous dysplasia is characterized by a progressive replacement of normal bone elements by fibrous tissue. The temporal bone is rarely involved. In this location, complications such as facial deformity, conductive hearing loss and facial peripheral neural involvement can occur. Positive diagnosis can beestablished with computerized tomography which also enables assessment of extension and detection of complications. We report a case of a 27-year-old man with extensive fibrous dysplasia of the right temporal bone presenting withconductive hearing loss secondary to progressive stenosis of the external auditory canal. Computerized tomography of the temporal region wasperformed.