synovitis /sin′əvī″tis/ , an inflammatory condition of the synovial membrane of a joint as the result of an aseptic wound or a traumatic injury, such as a sprain or severe strain. The knee is most commonly affected. Fluid accumulates around the capsule; the joint is swollen, tender, and painful; and motion is restricted. In most cases, the inflammation subsides and the fluid is resorbed without medical or surgical intervention.
