title: Comparison of the recurrence risk of parameniscal cysts between patients treated with arthroscopic excision and arthroscopic decompression techniques.
abstract: OBJECTIVE
  To compare the recurrence risk of parameniscal cysts between arthroscopic meniscectomy with open cystectomy (arthroscopic excision) and entirely arthroscopic techniques with intra-articular cyst decompression (arthroscopic decompression).
  
  
  METHODS
  A retrospective longitudinal study was conducted at a medical centre in Taiwan between 2002 and 2012. Patients with symptomatic parameniscal cysts undergoing either arthroscopic excision or arthroscopic decompression were included. Parameniscal cyst recurrence was evaluated every 3 months after surgery. The recurrence risk associated with treatment group, cyst volume, and meniscal tear circumference was investigated.
  
  
  RESULTS
  This study included 241 young to middle-aged men and women. Of these, 112 underwent arthroscopic excision and 129 underwent arthroscopic decompression. During an average 26-month follow-up period, the arthroscopic decompression group had a sixfold higher recurrence risk [prevalence: 4 and 21 %, respectively; hazard ratio, HR 6.0 (95 % confidence interval, CI 2.3-15.6); p < 0.001] than the arthroscopic excision group. Furthermore, meniscal tears >12 mm in circumference and a cyst volume >2.4 cm(3) conferred a fivefold higher recurrence risk than both lesions of smaller dimensions, both in the overall population and in the arthroscopic decompression group [HRs 5.3 (95 % CI 2.3-12.2) and 5.35 (95 % CI 2.2-13.3), respectively; p values <0.001 for both].
  
  
  CONCLUSIONS
  The suggestion of our study is that the recurrence of parameniscal cysts may be strongly related to large cystic lesions and large meniscal tears. Arthroscopic excision is preferable for treating parameniscal cysts, which are large cystic lesions with large meniscal tears, to reduce the recurrence risk.
  
  
  METHODS
  III.
authors: Department of Orthopaedic Surgery, Tri-service General Hospital, National Defense Medical Center, No. 325, Sec. 2, Cheng-Kung Rd., Neihu District, Taipei, 114, Taiwan.|Department of Surgery, Zuoying Branch of Kaohsiung Armed Forces General Hospital, Kaohsiung, Taiwan.
authors: Jung-Jui
authors: JJ
authors: Chang
authors: Department of Public Health, Tzu-Chi University, Hualien, Taiwan.
authors: Yi-Hwei
authors: YH
authors: Li
authors: Department of Medicine, Hualien Armed Forces General Hospital, Hualien, Taiwan.|Division of Cardiology, Department of Internal Medicine, Tri-service General Hospital, National Defense Medical Center, Taipei, Taiwan.
authors: Gen-Min
authors: GM
authors: Lin
authors: Department of Orthopaedic Surgery, Tri-service General Hospital, National Defense Medical Center, No. 325, Sec. 2, Cheng-Kung Rd., Neihu District, Taipei, 114, Taiwan.
authors: Chia-Chun
authors: CC
authors: Wu
authors: Department of Orthopaedic Surgery, Tri-service General Hospital, National Defense Medical Center, No. 325, Sec. 2, Cheng-Kung Rd., Neihu District, Taipei, 114, Taiwan.
authors: Hsain-Chung
authors: HC
authors: Shen
authors: Department of Orthopaedic Surgery, Tri-service General Hospital, National Defense Medical Center, No. 325, Sec. 2, Cheng-Kung Rd., Neihu District, Taipei, 114, Taiwan. ltelarryjung@gmail.com.
authors: Ru-Yu
authors: RY
authors: Pan
mesh_terms: D000328:Adult; D001182:Arthroscopy / Q000379:methods*; D003560:Cysts / Q000453:epidemiology*; D019299:Decompression, Surgical / Q000379:methods*; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008297:Male; D008485:Medical Audit; D008592:Menisci, Tibial / Q000601:surgery; D008875:Middle Aged; D012008:Recurrence; D012189:Retrospective Studies; D018570:Risk Assessment; D013624:Taiwan / Q000453:epidemiology
keywords: Arthroscopy; Cyst decompression; Knee joint; Meniscal cysts