has part has part characteristic of part of inheres in part of has modifier Abnormal joint morphology Abnormal synovial membrane morphology 2008-03-26T04:27:00Z HP:0005262 UMLS:C4025225 Any structural anomaly of the synovium, which is a membrane that lines the cavity of synovial joints and consists of a lining layer of macrophage-like synoviocytes and fibroblast-like synoviocytes, as well as a sublining of connective tissue. Synovial cells are thought to contribute to joint homeostasis by secreting various factors such as hyaluronic acid and lubricin important for joint lubrication and function, as well as disposing of the waste products. morphology abnormal synovial cavity of joint