title: [Aneurysmal bone cyst of the mastoid bone: one case report].
abstract: Aneurysmal bone cyst of mastoid bone is seldom, here one case was reported. The mastoid bone of the patient presented with a baloon-like swelling full of non-coagulated blood and serous-hemorrhagic fluid. CT scan demonstrated a large expansile destructive mass located in left mastoid bone region with the thin or absent cortical bone. The MRI demonstrated T2-weighted images and clear boudary from surrounding tissue. Pathologic reported that the mastoid bone was repalcement with lacunar divided by fibro-tissue, containing numerous hemosiderin, giant cells and inflammatory cells. A surgery was performed and the patient was cured.
authors.forename: Baofeng
authors.initials: B
authors.lastname: Wang
authors.forename: Pingping
authors.initials: P
authors.lastname: Cao
authors.forename: Aiguo
authors.initials: A
authors.lastname: Liu
mesh_terms: D017824:Bone Cysts, Aneurysmal / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008416:Mastoid / Q000473:pathology*; D014057:Tomography, X-Ray Computed