This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. Your story matters Citation Kramer, Dennis E., Yi-Meng Yen, Michael Simoni, Patricia Miller, Lyle J. Micheli, Mininder S. Kocher, and Benton E. Heyworth. In later stages of the disorder there will be swelling of the affected joint which catches and locks during movement. 5). et al. 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. Die sichtbaren Zeichen von OCD sind die nach vorne abgeknickten, gefalteten Ohrmuscheln, aber OCD hört nicht an den Ohren auf. Osteochondritis dissecans (OCD) of the trochlear ridges involves primarily the lateral trochlear ridge with the medial trochlear ridge less commonly affected. A T1W sagittal image of the left knee shows an osteochondral defect (arrow) in the medial patellar facet with accompanied bone marrow oedema and the thickened, heterogeneous and fissured overlying cartilage. The articular surface of the patella also is a common site for OCD. A PDFS axial image of the right knee shows delamination of the thickened articular cartilage of the medial facet overlying an irregular cortical bony defect with surrounding bone marrow oedema (arrow). An all-arthroscopic suture fixation of the lesion was proposed. Radiologist,Fellow in Pediatric Imaging (2019/20), Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. A better prognosis is associated with early age; for instance in juvenile group healing potential is up to 75% [3] whereas in the adolescent group is about 50% and in the adult group chances of healing are low even with advanced treatment. Normal menisci, collateral ligaments and cruciate ligaments. 3 – left knee) revealed bilateral focal osteochondral defects in the medial patellar facets. A PDFS coronal image of the right knee shows an irregular osteochondral defect in the medial aspect of the patella with surrounding bone marrow oedema (arrow). Patients present with a vague, poorly localized aching pain typically of several months’ duration. The presence of bilateral and symmetrical patellar osteochondral defects is even rarer and in the English literature, only a few cases have been described [1, 2]. A PDFS axial image of the left knee shows an osteochondral defect (arrow) in the medial patellar facet with accompanied bone marrow oedema and fissuring of the overlying cartilage. Osteochondral lesions / defects (OCD) are a common pathology of subchondral bone and overlying cartilage in children and adolescents. An AP radiograph of the right knee demonstrates no osseous abnormality. The patellar tendon and patellar lengths should be nearly equal. There are several techniques to make an axial image of the patella. Juvenile OCD lesions have a better healing prognosis than adults. Patella OCD location. He has been aware of a large amount of fluid in the knees. ADVERTISEMENT: Radiopaedia is free thanks to our supporters and advertisers. The pain was increased by activity and by keeping the knee flexed for any length of time. A lateral radiograph of the right knee demonstrates effacement of the suprapatellar fat in keeping with a large joint effusion (arrow). The main symptom was anterior knee pain that resulted in limitation of any sports and even daily activities. Close Figure Viewer. country-specific VAT) per year! The weight-bearing surfaces of the lateral femoral condyle, tibia or patella may also be involved. This ratio is accurate on MRI’s of younger children, while patellar … Osteochondritis dissecans typically affects the lateral surface of the medial femoral condyle in adolescent males. Subchondral deformities were present in 16 out of 18 cases (88.9%), subchondral cyst formation in 4 cases (22.2%), reactive bone marrow signal in 8 cases (44.4%), overlying patellar cartilage abnormality in 14 cases (77.8%), loose body in 2 cases (11.1%), patella alta in 8 cases (44.4%), … Coexisting patellar, ligamentous, and meniscal abnormalities were noted. OCD usually causes pain during and after sports. Patellar damage during osteochondritis dissecans of the knee is rare. Written informed patient consent for publication has been obtained. Alternatively, unstable OCD lesions may similarly present with pain, swelling, and mechanical symptoms. He was referred on suspicion (by his GP) of osteochondritis dissecans. The patella is a less common site for osteochondritis dissecans (OCD) of the knee. Unable to process the form. 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. The left knee was far less symptomatic, with only occasional pain and crepitus. One commonly used technique is the inferosuperior projection. Technique for axial image (inferosuperior projection). Winn N, Department of Radiology, The Robert Jones and Agnes Hunt Orthopaedic Hospital, Oswestry, Shropshire, UK. Radiology 2000;215(3) ... OCD: osteochondritis dissecans. According to common hypotheses, repetitive microtrauma, local ischaemia, disturbance of normal ossification of accessory centres during maturation and hereditary factors are considered contributory to pathophysiology of OCD. The articular surface of the right knee swelling associated with any form of strenuous activity the of. 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