Capsular ligaments are part of the articular capsule that surrounds synovial joints. Arthritis of joints involves inflammation of the synovial membrane. The articular capsule has a synovial and a fibrous membrane separated by fatty deposits. These clusters causes an increase in synovial fibroblasts. HA when tested in cultured human synovial fibroblasts. In synovial proliferative disorders, MRI demonstrates synovial hypertrophy. Plica syndrome treatment focuses on decreasing inflammation of the synovial capsule. This membrane lines joints that possess cavities, known as synovial joints. Definitive diagnosis may require bone or synovial biopsy. They are lined with a synovial membrane that secretes a lubricating synovial fluid. It blocks the stimulation of prostaglandin E2 synthesis in synovial cells and thymocyte proliferation. Two cell types can be seen microscopically in synovial sarcoma. Hinge and pivot joints are both types of synovial joint. All synovial joints may be affected. The synovial cavity/joint is filled with synovial fluid.