title: Slipped capital femoral epiphysis: a physeal lesion diagnosed by MRI, with radiographic and CT correlation.
abstract: OBJECTIVE
  To define and compare early lesions associated with slipped capital femoral epiphysis (SCFE) on magnetic resonance imaging (MRI), computed tomography (CT) and radiography.
  
  
  METHODS
  Thirteen patients with 15 symptomatic hips due to SCFE underwent radiography and MRI; CT was performed in 12 patients. SCFE was graded on radiographs, head/neck angles and qualitative changes were evaluated on CT, and morphologic/signal abnormalities were determined on MRI.
  
  
  RESULTS
  Physeal widening, apparent on T1-weighted MRI, was evident in every case of SCFE, including one presumed "pre-slip." T2-weighted images demonstrated synovitis and marrow edema but obscured physeal abnormalities. CT head/neck angles ranged from 4-57 degrees for symptomatic to 0-14 degrees for asymptomatic hips. Physeal and metaphyseal changes were variably identified on both radiographs and CT in all cases of SCFE, but not in the pre-slip.
  
  
  CONCLUSIONS
  MRI clearly delineates physeal changes of both pre-slip and SCFE, and demonstrates very early changes at a time when radiographs and CT may appear normal.
authors.affiliation: Department of Radiology, Albert Einstein College of Medicine, Bronx, NY, USA.
authors.forename: H
authors.initials: H
authors.lastname: Umans
authors.forename: M S
authors.initials: MS
authors.lastname: Liebling
authors.forename: L
authors.initials: L
authors.lastname: Moy
authors.forename: N
authors.initials: N
authors.lastname: Haramati
authors.forename: N J
authors.initials: NJ
authors.lastname: Macy
authors.forename: H A
authors.initials: HA
authors.lastname: Pritzker
mesh_terms: D000293:Adolescent; D002648:Child; D004839:Epiphyses, Slipped / Q000175:diagnosis* / Q000000981:diagnostic imaging; D005260:Female; D005270:Femur Head; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed