title: Radiology quiz case 1. Pneumosinus dilatans (PSD) of the sphenoid sinus.
authors.affiliation: University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA.
authors.forename: Carlos M
authors.initials: CM
authors.lastname: Rivera-Serrano
authors.forename: Barry M
authors.initials: BM
authors.lastname: Schaitkin
authors.forename: Barton F
authors.initials: BF
authors.lastname: Branstetter
mesh_terms: D003937:Diagnosis, Differential; D004108:Dilatation, Pathologic; D005260:Female; D006801:Humans; D008875:Middle Aged; D010254:Paranasal Sinus Diseases / Q000000981:diagnostic imaging* / Q000473:pathology / Q000628:therapy; D013101:Sphenoid Sinus / Q000000981:diagnostic imaging* / Q000473:pathology; D014057:Tomography, X-Ray Computed