title: Pneumosinus dilatans: a discussion of four cases and the possible aetiology.
abstract: Pneumosinus dilatans is an abnormal dilatation of the paranasal sinuses, which contains only air and is lined by normal mucosa. It is a rare condition, the aetiology of which is unclear. We describe four patients who presented to our department with pneumosinus dilatans. The aetiology was either developmental hydrocephalus (n = 1), post-traumatic (n = 1) or idiopathic (n = 2). Two patients underwent surgery, and follow-up is at least 12 months to date. The radiological aspects of this rare condition and the possible aetiologies are discussed.
authors.affiliation: Department of Radiology, City Hospital, Birmingham, United Kingdom.
authors.forename: W M
authors.initials: WM
authors.lastname: Adams
authors.forename: R I
authors.initials: RI
authors.lastname: Jones
authors.forename: S I
authors.initials: SI
authors.lastname: Chavda
authors.forename: A L
authors.initials: AL
authors.lastname: Pahor
authors.forename: K T
authors.initials: KT
authors.lastname: Taifa
mesh_terms: D000293:Adolescent; D000328:Adult; D004108:Dilatation, Pathologic / Q000175:diagnosis / Q000209:etiology / Q000601:surgery; D004678:Encephalomalacia / Q000175:diagnosis / Q000209:etiology; D005005:Ethmoid Sinus / Q000000981:diagnostic imaging* / Q000601:surgery; D005260:Female; D050723:Fractures, Bone / Q000150:complications; D005626:Frontal Sinus / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D006849:Hydrocephalus / Q000150:complications; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009666:Nose / Q000293:injuries; D010254:Paranasal Sinus Diseases / Q000175:diagnosis* / Q000209:etiology* / Q000601:surgery; D014057:Tomography, X-Ray Computed