a fall on to the knee or a RTA where the knee hits the dashboard Direct Trauma: A blow to the knee e.g.
However, if the knee plica becomes irritated or inflamed, typically from overuse or an injury, plica synovialis develops causing pain and instability in the knee. In most cases, synovial plica are completely asymptomatic and don’t cause any problems. These folds in the membrane, known as synovial knee plica, are elastic so do not usually restrict normal knee movement and vary in size between individuals. However, in up to 90% of the population, the connective tissue isn’t fully absorbed leaving small inward folds in parts of the synovial membrane, known as knee plica. During the second trimester, this tissue begins to reduce in size as the fetus starts moving more and is gradually reabsorbed before birth, leaving only a thin sleeve which surrounds the knee joint, the synovial membrane. The word “plica” is Latin for “fold”.ĭuring the first trimester of fetal development, connective tissue divides the knee into three compartments. Knee plica are normal folds in the synovial membrane of the knee, a thin, fluid-filled capsule that encases the joint, like a bag. Here we look at how plica synovialis develops, the causes and symptoms, and finally look at the different treatment options for knee plica syndrome. Knee plica irritation occurs when the plica gets caught or pinched between the knee bones, usually due to a knee injury or from overuse. Plica syndrome, aka plica synovialis, can develop in any of the four knee plica, the most common being in the medial plica. Plicae are small folds in the synovial membrane, the thin structure that surrounds and lines the knee joint. It results in achy knee pain which gets worse with activity, particularly up and down stairs, a feeling of instability in the knee and sometimes a catching or locking sensation. Plica syndrome is a condition caused by inflammation in the lining of the knee joint.
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