Musculoskeletal Imaging

Mixed calcium phosphate crystal deposition disease

an arthropathy characterized by coexistence of calcium hydroxyapatite crystal deposition disease and calcium pyrophosphate dihydrate crystal deposition disease in synovial fluid or cartilage. Radiographic diagnosis may be difficult, although the presence of both extensive chondrocalcinosis and accumulation of calcium hydroxyapatite crystals (diffuse intra-articular and capsular calcification or dense homogeneous calcific collections at tendinous insertions) is helpful.