title: Radiology quiz case 1. Diagnosis: Cholesteatoma of the frontal sinus.
authors.forename: Federico Maria
authors.initials: FM
authors.lastname: Gioacchini
authors.forename: Francesco
authors.initials: F
authors.lastname: Mattioli
authors.forename: Alessandra
authors.initials: A
authors.lastname: Todeschini
authors.forename: Livio
authors.initials: L
authors.lastname: Presutti
mesh_terms: D000328:Adult; D002781:Cholesteatoma / Q000175:diagnosis* / Q000601:surgery; D003952:Diagnostic Imaging / Q000379:methods*; D004724:Endoscopy / Q000379:methods; D005260:Female; D005500:Follow-Up Studies; D005626:Frontal Sinus / Q000000981:diagnostic imaging*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D010254:Paranasal Sinus Diseases / Q000175:diagnosis* / Q000601:surgery; D018570:Risk Assessment; D014057:Tomography, X-Ray Computed / Q000379:methods; D016896:Treatment Outcome