title: Intraosseous pneumatocysts of the ilium. Findings on radiographs and CT scans.
abstract: CT scans demonstrated a localized collection of gas adjacent to a normal sacroiliac joint in 5 patients. In each case the lesion was sharply demarcated by a thin sclerotic rim. A benign bone cyst was confirmed histologically in 2 cases. The radiologist should be aware of this appearance so as to avoid invasive procedures based on a misdiagnosis of infection or neoplasm.
mesh_terms: D000328:Adult; D000368:Aged; D001845:Bone Cysts / Q000000981:diagnostic imaging*; D005740:Gases; D006801:Humans; D007085:Ilium / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed
chemical_list: D005740:Gases