title: Sudden onset of paraparesis caused by hypertrophy of the thoracic posterior longitudinal ligament.
abstract: METHODS
  Case report of a rare form of hypertrophy of the thoracic posterior longitudinal ligament (HPLL), causing paraparesis.
  
  
  OBJECTIVE
  To describe this very rare pathological condition in the thoracic spine and the results of surgical intervention.
  
  
  METHODS
  A department of orthopaedic surgery in Japan.
  
  
  METHODS
  A 61-year-old man presented with acute paraparesis associated with HPLL in the thoracic region. A radiographic and pathological review of the case was conducted. Anterior decompression was performed, and he was followed for 3 years after the operation.
  
  
  RESULTS
  Pathologic examination of the surgical specimen revealed proliferation of fibrocartilage and calcification. The patient's paraparesis ameliorated after the operation.
  
  
  CONCLUSIONS
  For this case of myelopathy due to HPLL in the thoracic spine, urgent decompression gave excellent results. Clinical awareness of HPLL may aid correct diagnosis and prompt therapy.
authors.affiliation: Department of Orthopaedic Surgery, Gifu University, Gifu, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Nozawa
authors.forename: K
authors.initials: K
authors.lastname: Shimizu
authors.forename: K
authors.initials: K
authors.lastname: Miyamoto
authors.forename: Y
authors.initials: Y
authors.lastname: Sakaguchi
authors.forename: H
authors.initials: H
authors.lastname: Nishimoto
authors.forename: H
authors.initials: H
authors.lastname: Hosoe
mesh_terms: D000208:Acute Disease; D006801:Humans; D006984:Hypertrophy; D017846:Longitudinal Ligaments / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D020335:Paraparesis / Q000209:etiology* / Q000473:pathology* / Q000601:surgery; D013904:Thoracic Vertebrae