The patient usually falls to the ground in pain, at which time the patella reduces spontaneously. Osteochondritis dissecans (OCD) most commonly affects the knee. [1] This may result in separation and instability of a segment of cartilage and free movement of these osteochondral fragments within the joint space. anterior aspect of lateral femoral chondyle and posterolateral tibial plateau Increased awareness of osteochondral injuries, development of cartilage repair techniques, and advances in MRI technology have increased the diagnostic frequency of these lesions. Treatment of osteochondral defects in the knee with MaioRegen Mr Andrew Edwards. Osteochondral lesions / defects (OCD) are a common pathology of subchondral bone and overlying cartilage in children and adolescents. Images were first evaluated for the presence of the typical bone contusion pattern involving the anterolateral femoral condyle and the inferomedial patella. OBJECTIVE. The typical bone bruise pattern involving the anterolateral femoral condyle and inferomedial patella after transient lateral dislocation of the patella is a well-described MRI finding. It was decided to use the superomedial aspect of the trochlea as the donor sight for the osteochondral autograft. Although osteochondral defects of the patella are usually best appreciated in the axial imaging plane, the lateral femoral condyle osteochondral injuries in this series were best depicted in either the coronal or the sagittal imaging plane. In addition, two of the patients have not undergone follow-up surgery. They are not possible to be detected by way of physical examination, but sometimes the clinical history can point towards a chondral defect being the cause of the pain. Material and Methods: We retrospectively evaluated MR imaging findings of all knee MRI exams performed at our institution over the past five years. look for background factors that predispose to the formation of articular defects. Each of the lateral femoral chondral defects in our series was a full-thickness chondral defect with or without underlying cortical abnormality, which is similar to the findings reported by Swischuk et al. Limitations of this study include the small sample size. This proved to be a highly predictable pattern of injury and was observed in each of the 10 cases. Table 1 summarizes the patients' profiles and the results of MRI and surgical findings. Nonetheless, both the MRI and surgical results suggest that lateral femoral condyle osteochondral lesions are common, and a search pattern should include an evaluation of the femoral condyle articular surface in both the sagittal and coronal imaging planes after transient dislocation of the patella. These MRI examinations were performed at six different outpatient imaging facilities. 3. cartilage injury with associated subchondral fracture but without detachment Consequently, our objective was to determine the incidence of lateral femoral condyle osteochondral injuries and to better define the locations and patterns of chondral injury involving the lateral femoral condyle after transient dislocation of the patella based on MRI and follow-up arthroscopy. She obtained radiographs (not shown) which showed an osteochondral defect. As a result, orthopedic research has concentrated on the development of alternative strategies. At the time of this study, eight (80%) of the 10 patients with osteochondral injuries of the lateral femoral condyle identified on MRI had undergone follow-up arthroscopic surgery. A magnetic resonance imaging (MRI) scan of the knee is performed at six months to assess the cartilage repair and subchondral bone. It is often used synonymously with osteochondral injury/defect and in the pediatric population. A chondral defect refers to a focal area of damage to the articular cartilage (the cartilage that lines the end of the bones). A contained grade IV lesion measuring approximately 8 mm involving the lateral femoral condyle. The 25 cases were retrospectively reviewed in consensus by two musculoskeletal radiologists who had 7 and 18 years, respectively, of clinical experience in musculoskeletal radiology. Chondral and osteochondral injuries were the most common lesions discovered in children undergoing MRI for evaluation of internal derangement of the knee in one study . A chondral defect refers to a focal area of damage to the articular cartilage (the cartilage that lines the end of the bones). A localized osteochondral defect can be created acutely or can develop as an end result of several chronic conditions. Results. This report does not attempt to determine the frequency of this injury but simply describes the arthroscopic findings in seven patients [8]. Particularly in the younger patient, MRI plays an important clinical role in the diagnosis of pre-radiographic OA and focal osteochondral injury. The lack of long-term studies and no general consensus as to the best way to manage these lesions compounds the challenge. 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. These osteochondral injuries typically involve the inferomedial pole, the median eminence of the patella [5], or both and can result either from a shearing injury at the time of dislocation or reduction or from an impaction injury as the patella strikes the nonarticular surface of the anterolateral femoral condyle. Osteochondral defects of the lateral femoral condyle are a common sequela after transient lateral patellar dislocation. We have recog-nized the appearance of such lesions in the hip and report on their MR imaging appearance and occurrence in elite athletes. Each of the original interpretations was performed by one of four experienced, fellowship-trained musculoskeletal radiologists. The talus is the 3rd most common site (after the knee and elbow) of osteochondral lesions. • To discuss concomitant MR findings. In addition to the bone contusion pattern, osteochondral injuries of the patella have also been reported, and these range from mild articular cartilage surface irregularity to large displaced osteochondral fractures [1-4]. 1 ) and anterolateral (46%) talar dome ( 1 ). Published by Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal Of The Esska, 27 June 2017 . The location of the lateral femoral condyle osteochondral injury was observed to maintain a constant relationship with regard to the location of the lateral femoral condyle bone contusion. These can occur from an acute traumatic injury to the knee or an underlying disorder of the bone. Osteochondral defects of the lateral femoral condyle are a common sequela after transient lateral patellar dislocation. Address correspondence to T. G. Sanders ([email protected]). Authors: Patrick Graham. The use of low-field-strength magnets may have actually resulted in underdetection of these lesions. Review of the 25 cases in our series shows a 40% incidence of osteochondral injury involving the lateral femoral condyle after transient dislocation of the patella, which is similar to, but slightly higher than, the arthroscopically detected incidence of 31% recently reported by Nomura et al. Articular cartilage lesions are common and have been reported in 63% of over 31,000 arthroscopic procedures in one series.1 Although 20% have been… Osteochondral defect is more common among young athletes who actively take part in sports and most commonly affects the femoral condyles in the knee. During reduction, the articular surface of the medial aspect of the lower pole of the patella first impacts the nonarticular portion of the lateral femoral condyle, resulting in the classic bone contusion. 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