title: Disc degeneration and lumbar instability. Magnetic resonance examination of 16 patients.
abstract: Flexion and extension radiographs of 75 young males with low back pain disclosed abnormal segmental motion of the lumbar spine in 16 patients with translational movements in 20 intervertebral segments. These 16 patients were further investigated by magnetic resonance imaging to assess disc degeneration in the unstable segments. On T2-weighted images of the 20 segments, the disc was normal in 13 and degenerated in only 7 patients. Thus, the initial factor in lumbar instability in young patients with low back pain is not always degeneration of the disc.
authors.affiliation: Department of Surgery, Central Hospital of Mikkeli, Finland.
authors.forename: H
authors.initials: H
authors.lastname: Paajanen
authors.forename: M
authors.initials: M
authors.lastname: Erkintalo
authors.forename: S
authors.initials: S
authors.lastname: Dahlström
authors.forename: T
authors.initials: T
authors.lastname: Kuusela
authors.forename: E
authors.initials: E
authors.lastname: Svedström
authors.forename: M
authors.initials: M
authors.lastname: Kormano
mesh_terms: D000328:Adult; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000503:physiopathology; D007593:Joint Instability / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000503:physiopathology; D008159:Lumbar Vertebrae; D008279:Magnetic Resonance Imaging; D008297:Male; D008889:Military Personnel; D011859:Radiography