the identification of calcium pyrophosphate crystals within articular structures and in the surrounding soft tissues and radiologic findings of chondrocalcinosis , in the absence of identifiable uric acid crystals , emphasize the importance of crystal identification in all cases of probable gout and stress the diagnostic role of soft-tissue aspiration in cases of soft-tissue inflammation , especially when arthrocentesis is unsuccessful .
C0022417
articular structures
C0018099
gout