Bone invasion by an esthesioneuroblastoma mimicking fibrous dysplasia

We report the unusual findings of a superior nasal esthesioneuroblastoma extending intracranially with a pattern of invasion of the frontal bone and skull base mimicking the radiographic appearance of fibrous dysplasia. We correlate the CT and MR appearance of the bony changes with the surgical and pathologic findings and review the radiographic appearance of esthesioneuroblastoma and fibrous dysplasia.