title: Insidious progression of paraparesis secondary to type III spinal meningeal cyst: a study of six difficult cases.
abstract: METHODS
  Case report.
  
  
  METHODS
  Neuro-orthopaedic Unit, Fukui University Hospital, Japan.
  
  
  METHODS
  We studied six patients with insidious progression of paraparesis caused by thoracic and thoracolumbar spine type III spinal meningeal cyst and intradural arachnoid cyst, who underwent microsurgical decompression. Histologically, some samples showed oedematous and hypertrophic changes of the arachnoidal tissue together with occasional tophaceous deposits and calcification. Surgical treatment was complete excision of the cyst, or wide fenestration of these membrane, and close a communicating fistula, if detectable. All patients improved neurologically after microscopic surgery.
  
  
  CONCLUSIONS
  We stress the significance of neuroimaging and neurological assessment in patients with gradual progression of paraparesis caused by intradural arachnoid cyst, but surgical procedure and timing of operative intervention require further considerations.
authors.affiliation: Faculty of Medical Sciences, Department of Orthopaedics and Rehabilitation Medicine, Fukui University, Fukui, Japan. yayama@u-fukui.ac.jp
authors.forename: T
authors.initials: T
authors.lastname: Yayama
authors.forename: S
authors.initials: S
authors.lastname: Kobayashi
authors.forename: K
authors.initials: K
authors.lastname: Uchida
authors.forename: Y
authors.initials: Y
authors.lastname: Kokubo
authors.forename: H
authors.initials: H
authors.lastname: Nakajima
authors.forename: R
authors.initials: R
authors.lastname: Sato
authors.forename: A
authors.initials: A
authors.lastname: Bangirana
authors.forename: T
authors.initials: T
authors.lastname: Takamura
authors.forename: H
authors.initials: H
authors.lastname: Baba
mesh_terms: D016080:Arachnoid Cysts / Q000150:complications* / Q000473:pathology* / Q000601:surgery; D019299:Decompression, Surgical; D018450:Disease Progression; D005260:Female; D005402:Fistula / Q000209:etiology / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D020335:Paraparesis / Q000209:etiology*; D011128:Polyradiculopathy / Q000209:etiology / Q000601:surgery; D013117:Spinal Cord Compression / Q000209:etiology / Q000601:surgery