title: Evidence of the subperiosteal origin of osteoid osteomas in tubular bones: analysis by CT and MR imaging.
abstract: OBJECTIVE
  A large series of patients with pathologically proven osteoid osteoma of tubular bones was reviewed to determine the frequency of a subperiosteal site of origin.
  
  
  METHODS
  Thirty-eight cases that were included met two criteria: the tumor was located in a tubular bone, and the lesion had been evaluated by CT scanning or MR imaging, or both. The location of the osteoid osteoma was categorized as intracortical, sub-periosteal, endosteal, or medullary.
  
  
  RESULTS
  Among the 38 cases, 19 were imaged with CT scanning, 14 with MR imaging, and five with both techniques. The most common affected sites were the femur (n = 13), tibia (n = 15), and humerus (n = 4). Among these 38 cases, 18 were intracortical, two were intramedullary, and 18 were subperiosteal.
  
  
  CONCLUSIONS
  Osteoid osteomas occurring in a subperiosteal or surface location are not rare. Indeed, many osteoid osteomas arising in a tubular bone possibly originate in a subperiosteal site and later appear as an intracortical lesion. This site of origin appears to relate principally to continual remodeling of bone with subperiosteal deposition and endosteal erosion.
authors.affiliation: Department of Radiology, Veterans Affairs Medical Center, San Diego, CA 92161, USA.
authors.forename: F
authors.initials: F
authors.lastname: Kayser
authors.forename: D
authors.initials: D
authors.lastname: Resnick
authors.forename: P
authors.initials: P
authors.lastname: Haghighi
authors.forename: E do R
authors.initials: Edo R
authors.lastname: Pereira
authors.forename: G
authors.initials: G
authors.lastname: Greenway
authors.forename: M
authors.initials: M
authors.lastname: Schweitzer
authors.forename: P
authors.initials: P
authors.lastname: Kindynis
mesh_terms: D000328:Adult; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D001842:Bone and Bones / Q000000981:diagnostic imaging / Q000473:pathology; D002648:Child; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D010017:Osteoma, Osteoid / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D014057:Tomography, X-Ray Computed