title: Donor site evaluation after autologous osteochondral mosaicplasty for cartilaginous lesions of the elbow joint.
abstract: BACKGROUND
  One significant disadvantage of autologous osteochondral mosaicplasty (mosaicplasty) is the harvesting of osteochondral grafts from the normal articular area of the knee joint. However, the effect of harvesting grafts on knee function remains unclear.
  
  
  OBJECTIVE
  To clarify the functional effects on the donor knee of harvesting osteochondral grafts and to perform magnetic resonance imaging evaluation of donor site repair after mosaicplasty for capitellar osteochondritis dissecans in young athletes.
  
  
  METHODS
  Case series; Level of evidence, 4.
  
  
  METHODS
  Eleven male competitive athletes with advanced lesions of capitellar osteochondritis dissecans underwent mosaicplasties. The surgical technique involves obtaining small-sized cylindrical osteochondral grafts from the lateral periphery of the femoral condyle at the level of the patellofemoral joint and transplanting them to osteochondral defects in the capitellum. Assessment at a mean follow-up of 26 months included local findings of the donor knees, a Lysholm knee scoring scale, International Knee Documentation Committee standard evaluation form, and magnetic resonance imaging evaluation.
  
  
  RESULTS
  All patients returned to a competitive level of their previous sports without any donor site disturbances. Based on the Lysholm knee score and International Knee Documentation Committee evaluation form, all knees were graded as excellent and normal, respectively. The magnetic resonance imaging showed 50% to 100% defect fill in 6 of 9 patients and normal or nearly normal signals in 4 patients at the donor sites.
  
  
  CONCLUSIONS
  No adverse effects of osteochondral graft harvest on donor knee function were found after mosaicplasty for capitellar osteochondritis dissecans in young athletes. However, magnetic resonance imaging indicates that the donor site is resurfaced with fibrous tissue.
authors.affiliation: Department of Orthopaedic Surgery, Hokkaido University School of Medicine, Kita 15, Nishi 7, Sapporo 060-8638, Japan. niwasaki@med.hokudai.ac.jp
authors.forename: Norimasa
authors.initials: N
authors.lastname: Iwasaki
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kato
authors.forename: Tamotsu
authors.initials: T
authors.lastname: Kamishima
authors.forename: Naoki
authors.initials: N
authors.lastname: Suenaga
authors.forename: Akio
authors.initials: A
authors.lastname: Minami
mesh_terms: D000293:Adolescent; D000328:Adult; D016025:Bone Transplantation / Q000009:adverse effects*; D002356:Cartilage / Q000637:transplantation*; D002648:Child; D004551:Elbow Joint / Q000601:surgery*; D006801:Humans; D007719:Knee Joint / Q000601:surgery*; D008279:Magnetic Resonance Imaging; D008297:Male; D010008:Osteochondritis Dissecans / Q000601:surgery; D012189:Retrospective Studies; D020858:Tissue and Organ Harvesting / Q000009:adverse effects*; D014182:Transplantation, Autologous