The typical MRI findings after transient lateral dislocation of the patella have been well described and include a bone contusion pattern involving the inferomedial pole of the patella and the anterolateral aspect of the nonarticular portion of the lateral femoral condyle. In this right patellar osteochondral defect, 2 sutures are passed through each of the 2 lateral holes, from the anterior aspect of the patella to the articular side. MR shows large joint effusion in suprapatellar bursa with fat-fluid level (lipohemarthrosis). 6). A dorsal defect of the patella is a variant related to normal ossification, present in 0.3 to 1 % of the population, located in the superolateral aspect of the articular surface of the patella. cartilage defects are varied and include repair, regeneration, and reconstruction. Dorsal defect of the patella. cartilage injury with associated subchondral fracture but without detachment; thin sclerotic margin Dorsal defect of patella occurs in males and females with equal frequency and is most frequently found in adolescents. It is unusual that the osteochondral patellar defect site in this patient was in the inferior and central areas of the patella. Radiographic features Women had lower outcomes, and the need for realignment procedures led to a slower recovery. The medial location of the lesions and the involvement of the system of medial knee stability is a fundamental finding. Knee > Osteochondral Defect What is Osteochondral Defect? ADVERTISEMENT: Supporters see fewer/no ads. Although there is ongoing debate regarding the pathogenesis of OCD, there is a consensus supporting a traumatic/mechanical theory of injury to the osteochondral unit. Osteochondral or chondral loose bodies that result from recurrent patella instability or from longstanding OCD in skeletally mature patients may not be repairable. Conclusion: Osteochondral defects of the lateral femoral condyle are a common sequela after transient lateral patellar dislocation. X-rays pass through the knee from anterior to posterior at a 90° angle to the lower leg. Traumatic patellar dislocation 2 days ago. 4.8a–c. Unable to process the form. An osteochondral defect refers to a focal area of damage that involves both the cartilage and a piece of underlying bone. The patella is laterally subluxed. Osteochondral Defect is the name given to a condition most noticeable in the knee, in which a part of the bone and cartilage gets separated from the knee joint resulting in chronic pain in the knee and difficulties performing normal activities of daily living. Introduction. Transient lateral patellar dislocation is a common injury that typically occurs in the young, athletic individual. ADVERTISEMENT: Radiopaedia is free thanks to our supporters and advertisers. Two donor plugs were harvested from this region, measuring 10 × 14 mm and 6 × 14 mm, respectively. There is an articular cartilage defect at the medial patellar facet with adjacent bone marrow edema. The word osteochondral refers to anything relating to cartilage and bone. The treatment of focal cartilage defects of the patella is a major challenge in the field of cartilage repair. The patella is laterally subluxed. Acute patellar dislocation (APD) is associated with a spectrum of soft tissue and osteochondral injuries. All these cases presented ICRS stage IV osteochondritis dissecans with an empty defect lesion. Osteochondral lesion of the inferior aspect of the medial patellar facet with a full-thickness chondral defect, subchondral plate irregularity and marrow edema throughout the medial aspect of the patella. Osteochondral injury staging system for MRI attempts to grade the stability and severity of osteochondral injury and is used to plan management. Osteochondral lesions / defects (OCD) are a common pathology of subchondral bone and overlying cartilage in children and adolescents. A localized osteochondral defect can be created acutely or can develop as an end result of several chronic conditions. A review of a Polish registry found that more than half of patients undergoing knee arthroscopy had chondral defects, with 5.2% having Outerbridge Grade III or IV lesions. Chondral and osteochondral defects in the PF compartment are often encountered in clinical practice on advanced imaging studies and/or during arthroscopy. tella described chondral defects of the patella but made no mention of chondral injuries of the lateral femoral condyle [1â5]. It is often used synonymously with osteochondral injury/defect and in the pediatric population. Unable to process the form. Women had lower outcomes, and the need for realignment procedures led to a slower recovery. In these patients, excision is the preferred option, with careful determination of the size, depth, and location of the chondral injury for potential future cartilage restoration procedure. Clinical presentation. The average age at diagnosis was 20.5 ± 9.2 years old. A serious knee injury with large osteochondral defect of the femoral condyle and medial patella with loose bodies in the joint. ( fig bone structures in all sequences the superomedial aspect of the grafts among patients who OCA. 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