title: Epiphyseal growth arrest lines. MR findings.
abstract: We present two cases in which MR exams revealed unusual, low signal intensity lines in the marrow space of epiphyses. These epiphyseal lines were smooth and regular, creating a bone-in-bone appearance. These lines were much more conspicuous on MR than on radiographs, partly because of adjacent alterations in trabecular architecture. A history of prolonged immobilization during childhood in both cases suggests that these lines represent growth arrest lines persisting in the epiphyses.
authors.affiliation: Department of Radiological Sciences, University of California at Los Angeles 90095-6952, USA.
authors.forename: L
authors.initials: L
authors.lastname: Yao
authors.forename: L L
authors.initials: LL
authors.lastname: Seeger
mesh_terms: D000328:Adult; D004838:Epiphyses / Q000473:pathology; D005260:Female; D005269:Femur / Q000473:pathology*; D005270:Femur Head / Q000473:pathology*; D006801:Humans; D007103:Immobilization; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D013977:Tibia / Q000473:pathology*; D013997:Time Factors