MRI in Non-infectious Inflammation and Arthropathies

The non-infectious inflammatory disorders and arthropathies of the spine include several diseases broadly classified as rheumatoid arthritis (RA); the seronegative spondyloarthropathies (SpAs) including ankylosing spondylitis (AS), psoriatic arthritis (PsA), reactive arthritis (ReA), and enteropathic arthropathy (EnA); the synovitis-acne-pustulosis-hyperostosis-osteitis (SAPHO) group of syndromes; diffuse idiopathic skeletal hyperostosis (DISH); the crystal-induced arthropathies, including gout, calcium pyrophosphate deposition disease (CPPD), and calcium hydroxyapatite deposition disease (Ca-HADD); and the relatively uncommon disorders of primary synovial and chondrocyte neoplasia: pigmented villonodular synovitis (PVNS) and synovial osteochondromatosis (SOC), respectively.