RT Journal A1 Buda, Roberto A1 Vannini, Francesca A1 Cavallo, Marco A1 Grigolo, Brunella A1 Cenacchi, Annarita A1 Giannini, Sandro T1 Osteochondral Lesions of the Knee: A New One-Step Repair Technique with Bone-Marrow-Derived Cells JF The Journal of Bone & Joint Surgery JO The Journal of Bone & Joint Surgery YR 2010 FD December 1 VO 92 IS Supplement_2 SP 2 OP 11 DO 10.2106/JBJS.J.00813 UL http://dx.doi.org/10.2106/JBJS.J.00813 AB Osteochondral lesions of the knee are defects of the cartilaginous surface and underlying subchondral bone, most frequently traumatic in origin1. These lesions are predominantly located on the medial femoral condyle, and associated ligamentous or meniscal pathology is reported in 40% of cases2,3 (Fig. 1). Biomechanical studies have demonstrated increased stress concentration on the rim of the osteochondral defect, which may have important implications for cartilage longevity4. Due to poor hyaline cartilage repair capability, larger osteochondral lesions of the knee are associated both with immediate significant clinical impairment and with symptoms appearing approximately one decade earlier than the degenerative cartilage changes that are associated with idiopathic osteoarthritis5.