title: A sinus within a sinus.
authors.forename: H E
authors.initials: HE
authors.lastname: Belcher
authors.forename: I
authors.initials: I
authors.lastname: Zammit-Maempel
authors.forename: J D
authors.initials: JD
authors.lastname: Rose
mesh_terms: D005260:Female; D006801:Humans; D008443:Maxillary Sinus / Q000002:abnormalities* / Q000000981:diagnostic imaging*; D008875:Middle Aged; D014057:Tomography, X-Ray Computed