title: Gas Bubbles in the Bone: A Case Report.
abstract: Intraosseous pneumatocysts are benign gas-filled cavities within bones which are most commonly found in ilium, sacrum and vertebrae. The lesions are asymptomatic and found incidentally while evaluating for other injuries. Here, we present an intraosseous pneumatocyst of ilium in a 23-year-old male patient. Although once thought to be rare, intraossseous pneumatocyst are now believed to be more common. Thus, familiarity with their appearance is essential to avoid unnecessary workup. Intraosseous pneumatocysts are differentiated from more clinically significant differential diagnoses like osteonecrosis and osteomyelitis by their characteristic appearance of intraosseous air collections with sclerotic rim.
authors.affiliation: Assistant Professor, Department of Radiology, Faculty of Medicine, Mashhad University of Medical Sciences , Mashhad, Iran .
authors.forename: Bita
authors.initials: B
authors.lastname: Abbasi
authors.affiliation: Associate Professor, Department of Radiology, Faculty of Medicine, Mashhad University of Medical Sciences , Mashhad, Iran .
authors.forename: Farrokh
authors.initials: F
authors.lastname: Seilanian-Toosi
authors.affiliation: Associate Professor, Department of Radiology, Faculty of Medicine, Mashhad University of Medical Sciences , Mashhad, Iran .
authors.forename: Sirous
authors.initials: S
authors.lastname: Nekooei
authors.affiliation: Assistant Professor, Department of Emergency Medicine, Faculty of Medicine, Mashhad University of Medical Sciences , Mashhad, Iran .
authors.forename: Behrang Rezvani
authors.initials: BR
authors.lastname: Kakhki
authors.affiliation: Assistant Professor, Department of Emergency Medicine, Faculty of Medicine, Mashhad University of Medical Sciences , Mashhad, Iran .
authors.forename: Reza
authors.initials: R
authors.lastname: Akhavan
keywords: Ilium; Intraosseous; Pneumatocyst; Tomography