Characterisation of first metatarsophalangeal joint osteoarthritis using magnetic resonance imaging.

Osteophytes, bone marrow lesions, subchondral cysts, effusion-synovitis, joint space narrowing, and cartilage loss are characteristic MRI features of first MTP joint OA. First MTP joint OA is a disease of multiple joint tissues and this has implications for the assessment and management of this condition. Key Points • First metatarsophalangeal joint osteoarthritis is a disease of multiple joint tissues. • Osteophytes, bone marrow lesions, subchondral cysts, effusion-synovitis, joint space narrowing, and cartilage loss are characteristic MRI features of first metatarsophalangeal joint osteoarthritis. • These findings have implications for the assessment and management of this condition.