Magnetic resonance imaging manifestations of synovial lesions of the ankle and foot.

Inflammatory, infectious, neoplastic, degenerative, or idiopathic disorders may all be manifested as synovial disease. MR imaging allows noninvasive evaluation of synovial disease and is a highly sensitive modality for detection of synovial pathology. Intravenous or intra-articular contrast administration will sometimes further increase signal differences between inflamed synovium, joint effusion, and surrounding structures.