title: Mastoid pneumocele causing atlantooccipital pneumatization.
abstract: A 49-year-old woman had a palpable mass in her occipital region. Plain radiographs and CT examination revealed extensive atlantooccipital pneumatization with findings consistent with the diagnosis of mastoid pneumocele. Decompression was achieved with placement of a myringotomy tube, resulting in prompt symptomatic relief. On a follow-up CT examination, the pneumatized areas had become opacified and new bone formation was present.
authors.affiliation: Department of Radiology and Diagnostic Imaging, University of Alberta, Edmonton, Canada.
authors.forename: M L
authors.initials: ML
authors.lastname: Martin
authors.forename: R
authors.initials: R
authors.lastname: Bhargava
authors.forename: R A
authors.initials: RA
authors.lastname: Ashforth
authors.forename: D B
authors.initials: DB
authors.lastname: Russell
mesh_terms: D000388:Air; D001269:Atlanto-Occipital Joint / Q000000981:diagnostic imaging*; D001847:Bone Diseases / Q000000981:diagnostic imaging / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008416:Mastoid / Q000000981:diagnostic imaging*; D008875:Middle Aged; D008876:Middle Ear Ventilation; D009777:Occipital Bone / Q000000981:diagnostic imaging*; D010012:Osteogenesis; D013122:Spinal Diseases / Q000000981:diagnostic imaging / Q000601:surgery; D014057:Tomography, X-Ray Computed; D014432:Tympanic Membrane / Q000601:surgery