title: MR imaging evaluation of subacute and chronic bone abscesses in children.
abstract: OBJECTIVE
  The aim of the present study was to assess the value of magnetic resonance (MR) imaging in subacute and chronic bone abscesses in children.
  
  
  METHODS
  Seventy-four patients underwent MR imaging because of suspected musculoskeletal infections between January 1996 and January 1999 in Montreal Children's Hospital. The clinical, radiographic, scintigraphic and MR imaging features of patients with a bone abscess were studied.
  
  
  RESULTS
  Eleven patients had osteomyelitis with no bone abscess and six had osteomyelitis with a subacute or chronic bone abscess. Although the lucency was eventually seen on plain radiographs in all cases, MR imaging made a significant contribution, as it helped narrow the differential diagnosis and showed better delineated medullary involvement and extension into the epiphysis.
  
  
  CONCLUSIONS
  MR imaging is valuable in the diagnostic evaluation of children with bone infection and abscess. It reveals the extent of subperiosteal and epiphyseal involvement not seen on plain radiographs. The extent of the medullary involvement around the abscess is best visualized with MR imaging, which can also distinguish between isolated soft tissue infection adjacent to bone and true bone infection.
authors: Department of Radiology, McGill University, Montreal Children's Hospital, Canada.
authors: T
authors: T
authors: Pöyhiä
authors: E M
authors: EM
authors: Azouz
mesh_terms: D000038:Abscess / Q000175:diagnosis* / Q000382:microbiology; D002648:Child; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007223:Infant; D008279:Magnetic Resonance Imaging; D008297:Male; D010019:Osteomyelitis / Q000175:diagnosis* / Q000382:microbiology; D011552:Pseudomonas Infections / Q000175:diagnosis; D012189:Retrospective Studies; D013203:Staphylococcal Infections / Q000175:diagnosis