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Synovial Chondromatosis

Other Names for this Disease
  • Synovial osteochondromatosis
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Synovial chondromatosis is a type of non-cancerous tumor that arises in the lining of a joint. The knee is most commonly affected, however it can affect any joint. The tumors begin as small nodules of cartilage. These nodules can separate and become loose within the joint.[1] Some tumors may be no larger than a grain of rice.[2] Synovial chondromatosis most commonly occurs in adults ages 20 to 50. Signs and symptoms may include pain, swelling, a decreased range of motion, and locking of the joint.[1][2] The exact underlying cause of the condition is unknown.[1] Treatment may involve surgery to remove the tumor. Recurrence of the condition is common.[1]
Last updated: 6/24/2013


  1. Synovial chondromatosis. Children's Hospital Boston. Accessed 5/18/2011.
  2. Joint tumors. Merck Manual. Accessed 5/18/2011.
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