Abstract
. In pneumo-arthrograms the density of the suprapatellar plica serves as an index of synovial reaction, and is of value in prognosis. 3. Fibrosis, hyalinization, or calcification of the suprapatellar plica mechanically interferes with the extensor apparatus, producing a syndrome of pseudo "locking", pain, and chronic effusion, which is to be differentiated from other intra-articular disabilities. Copyright © 1950 by The Journal of Bone and Joint Surgery, Incorporated...

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