title: Foramen Magnum Decompression and Duraplasty is Superior to Only Foramen Magnum Decompression in Chiari Malformation Type 1 Associated with Syringomyelia in Adults.
abstract: METHODS
  Retrospective cohort study.
  
  
  OBJECTIVE
  To compare surgical results of foramen magnum decompression with and without duraplasty in Chiari malformation type 1 (CM-1) associated syringomyelia (SM).
  
  
  BACKGROUND
  The optimal surgical treatment of CM-1 associated with SM is unclear.
  
  
  METHODS
  Twenty-five cases of CM-1 with SM were included. There were 12 patients (48%) in the non-duraplasty group and 13 patients (52%) in the duraplasty group. The rate of improvement, state of postoperative SM size, amount of tonsillar herniation, preoperative symptom duration, complications and reoperation rates were analysed.
  
  
  RESULTS
  The rate of clinical improvement was significantly higher with duraplasty (84.6%) than without (33.3%, p <0.05). The rate of postoperative syrinx regression was significantly higher in the duraplasty group (84.6%) than in the non-duraplasty group (33.3%, p <0.05). One case in the duraplasty group needed a reoperation compared with five cases in the non-duraplasty group (p =0.059).
  
  
  CONCLUSIONS
  Duraplasty is superior to non-duraplasty in CM-1 associated with SM despite a slightly higher complication rate.
authors.affiliation: Neurosurgery Clinic, Emsey Hospital, Istanbul, Turkey.
authors.forename: Mehmet Sabri
authors.initials: MS
authors.lastname: Gürbüz
authors.affiliation: Neurosurgery Clinic, Acibadem Hospital, Istanbul, Turkey.
authors.forename: Mehmet Zafer
authors.initials: MZ
authors.lastname: Berkman
authors.affiliation: Neurosurgery Clinic, Agri Public Hospital, Agri, Turkey.
authors.forename: Emre
authors.initials: E
authors.lastname: Ünal
authors.affiliation: Neurosurgery Clinic, Sanliurfa Public Hospital, Sanliurfa, Turkey.
authors.forename: Elif
authors.initials: E
authors.lastname: Akpınar
authors.affiliation: Department of Neurosurgery, Haydarpasa Numune Training Hospital, Istanbul, Turkey.
authors.forename: Şevki
authors.initials: Ş
authors.lastname: Gök
authors.affiliation: Department of Neurosurgery, Haydarpasa Numune Training Hospital, Istanbul, Turkey.
authors.forename: Metin
authors.initials: M
authors.lastname: Orakdöğen
authors.affiliation: Neurosurgery Clinic, Emsey Hospital, Istanbul, Turkey.
authors.forename: Salih
authors.initials: S
authors.lastname: Aydın
keywords: Chiari malformation type 1; Duraplasty; Foramen magnum decompression; Non-duraplasty; Syringomyelia