title: Spontaneous pneumatocele and pneumocephalus associated with mastoid hyperpneumatization.
abstract: We present a case of spontaneous pneumatocele and pneumocephalus associated with mastoid hyperpneumatization. Collections of air such as these are normally due to injury or surgery, and more rarely, infection or tumor; exceptionally they may be spontaneous. The patient in question complained of a progressively enlarging retroauricular mass which increased in size on Valsalva maneuvers; he had no other symptoms. The etiology, skull X-rays, computed tomography and follow-up after surgery are shown here.
authors.affiliation: Department of Radiology, Hospital Santiago Apóstol, Calle Olaguíbel, 29 01004 Vitoria, Spain. eanorbe@hsan.osakidetza.net
authors.forename: E
authors.initials: E
authors.lastname: Añorbe
authors.forename: P
authors.initials: P
authors.lastname: Aisa
authors.forename: J
authors.initials: J
authors.lastname: Saenz de Ormijana
mesh_terms: D000328:Adult; D001847:Bone Diseases / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D004646:Emphysema / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D006801:Humans; D008297:Male; D008416:Mastoid / Q000000981:diagnostic imaging* / Q000601:surgery; D011007:Pneumocephalus / Q000000981:diagnostic imaging / Q000209:etiology* / Q000601:surgery; D014057:Tomography, X-Ray Computed; D014636:Valsalva Maneuver