The Natural History of Anterior Knee Pain in Japanese Adolescents
Many reports have described that chronic pain in the front of the knee among adolescents can be caused by cartilaginous changes of the patellofemoral joint, so-called chondromalacia of the patella. These cartilaginous changes are often present in patella alta, patellar malalignment syndrome, subluxation of the patella, unstable patella, dysplasia of the patella (such as Wiberg type III), dysplasia of the femoral condyle and others. We also found cartilaginous changes of the patellofemoral joint in these diseases using arthroscopic study or during operations. However, some patients with chronic pain in the front of the knee had no instability of the patella upon physical examination, no abnormalities of the patellofemoral joint (such as incongruity) on radiological study (including skyline view) and no morbid changes on arthroscopic study. Is it reasonable to regard such cases as having a prechondromalacia condition? How should they be categorised and treated? To attempt to answer these questions, we investigated the natural history of anterior knee pain in Japanese adolescents, using questionnaires.
KeywordsKnee Pain Femoral Condyle Anterior Knee Pain Patellofemoral Joint Patellar Cartilage
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