title: Reduction plasty for hypertrophic anterior cruciate ligament mucoid degeneration: clinical and knee laxity outcomes in 23 cases.
abstract: BACKGROUND
  The best treatment for anterior cruciate ligament (ACL) mucoid degeneration remains open to debate. Current options are total or partial ACL resection, or a more conservative strategy, reduction plasty. The goal of this study was to retrospectively evaluate the effects of reduction plasty for ACL hypertrophy due to mucoid degeneration from clinical outcome and knee laxity points of view.
  
  
  METHODS
  Arthroscopy was carried out on 23 knees (21 patients) to perform a circular volume reduction plasty of the ACL, while preserving the greatest number of ligament fibers. Notchplasty was not performed. All the patients were seen again with an average follow-up of 32 months (range 8-70).
  
  
  RESULTS
  All the knees except three had symmetric postoperative flexion. Three patients still had pain. No patient reported having subjective feelings of instability. Among the 20 knees tested with the GNRB(TM) knee laxity measurement device, one knee had a 2.4mm difference in laxity and three had between 3 and 4mm of difference; 16 knees had no residual laxity.
  
  
  CONCLUSIONS
  Treatment of ACL mucoid degeneration by reduction plasty leads to complete pain relief in 80% of cases while maintaining good postoperative knee stability.
  
  
  METHODS
  Level IV. Retrospective study.
authors.affiliation: North Mayenne Hospital, Orthopaedic Department, 229, boulevard Paul-Lintier, 53100 Mayenne, France.
authors.forename: A
authors.initials: A
authors.lastname: Morice
authors.forename: A
authors.initials: A
authors.lastname: Coupry
authors.forename: F
authors.initials: F
authors.lastname: Lintz
authors.forename: H
authors.initials: H
authors.lastname: Robert
mesh_terms: D000328:Adult; D000368:Aged; D016118:Anterior Cruciate Ligament / Q000473:pathology* / Q000601:surgery*; D001182:Arthroscopy / Q000379:methods*; D015331:Cohort Studies; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006984:Hypertrophy / Q000473:pathology / Q000601:surgery; D007593:Joint Instability / Q000473:pathology / Q000601:surgery*; D007719:Knee Joint / Q000473:pathology / Q000601:surgery; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D011182:Postoperative Care / Q000379:methods; D016059:Range of Motion, Articular / Q000502:physiology*; D019651:Plastic Surgery Procedures / Q000379:methods*; D020127:Recovery of Function; D012189:Retrospective Studies; D013718:Tensile Strength; D016896:Treatment Outcome
keywords: Anterior cruciate ligament; Knee laxity measurement; Mucoid degeneration