title: Tubular acetabular intraosseous contrast tracking in MR arthrography of the hip: prevalence, clinical significance, and mechanisms of development.
abstract: OBJECTIVE
  The purpose of this study was to describe tubular intraosseous tracking of contrast medium in the acetabular fossa, to our knowledge a previously undocumented imaging finding in MR arthrography of the hip, and to discuss its prevalence, clinical significance, and possible mechanisms of development.
  
  
  CONCLUSIONS
  Tubular acetabular intraosseous contrast tracking is a common MR arthrographic finding that seems to have little clinical significance. Although the exact pathophysiologic mechanism is unknown, we presume repeated pumping of joint fluid through the nutrient foramina of the acetabular fossa may be one mechanism.
authors.affiliation: Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital, College of Medicine, Chang Gung University, 5 Fu-Hsing St., Gui-Shan, Tao-Yuan 33300, Taiwan. lclienmdrad@yahoo.com
authors.forename: Li-Chang
authors.initials: LC
authors.lastname: Lien
authors.forename: John C
authors.initials: JC
authors.lastname: Hunter
authors.forename: Yi-Sheng
authors.initials: YS
authors.lastname: Chan
mesh_terms: D000077:Acetabulum / Q000737:chemistry*; D000293:Adolescent; D000328:Adult; D000368:Aged; D003287:Contrast Media / Q000493:pharmacokinetics; D005260:Female; D006615:Hip / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies
chemical_list: D003287:Contrast Media