title: Frontal sinus pneumocoele: a rare cause of orbital emphysema.
abstract: Sudden onset nonaxial proptosis and diplopia is alarming and orbital haemorrhage or a rapidly expanding orbital tumour should be excluded. We present a case of a young man aged 15 years who attended the Accident and Emergency Department with a 6-h history of sudden onset proptosis and diplopia in whom the aetiology was orbital emphysema.
authors.forename: Manickam Nick
authors.initials: MN
authors.lastname: Muthiah
authors.forename: Alexander C
authors.initials: AC
authors.lastname: Day
authors.forename: Ravinder P
authors.initials: RP
authors.lastname: Singh
authors.forename: Nabeel
authors.initials: N
authors.lastname: Malik
authors.forename: Matt E
authors.initials: ME
authors.lastname: Adams
authors.forename: Jane M
authors.initials: JM
authors.lastname: Olver
mesh_terms: D000293:Adolescent; D004172:Diplopia / Q000175:diagnosis; D004646:Emphysema / Q000000981:diagnostic imaging / Q000209:etiology* / Q000503:physiopathology; D005094:Exophthalmos / Q000175:diagnosis; D005626:Frontal Sinus / Q000000981:diagnostic imaging* / Q000503:physiopathology; D006801:Humans; D008297:Male; D009078:Mucocele / Q000150:complications* / Q000000981:diagnostic imaging / Q000503:physiopathology; D009916:Orbital Diseases / Q000000981:diagnostic imaging / Q000209:etiology* / Q000503:physiopathology; D010254:Paranasal Sinus Diseases / Q000150:complications* / Q000000981:diagnostic imaging / Q000503:physiopathology; D014057:Tomography, X-Ray Computed