&NA;Fibrous dysplasia of the cervical spine is rare. No prior reports have discussed odontoid fractures in the setting of fibrous dysplasia. We describe a 26‐year‐old man who suffered a traumatic odontoid fracture in an area of preexisting fibrous dysplasia. The patient was treated conservatively in a sterno‐occipito‐mandibular immobilizer brace with a good result. A review of fibrous dysplasia is presented. Alternative methods of diagnosis and treatment options in our patient are discussed. (Neurosurgery24:905‐909, 1989)