Journal
RADIOLOGIC CLINICS OF NORTH AMERICA
Volume 55, Issue 5, Pages 967-+Publisher
W B SAUNDERS CO-ELSEVIER INC
DOI: 10.1016/j.rcl.2017.04.004
Keywords
Gout; Calcium pyrophosphate; CPPD; Crystal deposition; Crystal arthropathy; Basic calcium phosphate; Hydroxyapatite
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This article reviews the main radiographic features of crystal deposition diseases. Gout is linked to monosodium urate crystals. Classic radiographic features include subcutaneous tophi, large and well-circumscribed paraarticular bone erosions, and exuberant bone hyperostosis. Calcium pyrophosphate deposition (CPPD) can involve numerous structures, such as hyaline cartilages, fibrocartilages, or tendons. CPPD arthropathy involves joints usually spared by osteoarthritis. Basic calcium phosphate deposits are periarticular or intraarticular. Periarticular calcifications are amorphous, dense, and round or oval with well-limited borders, and most are asymptomatic. When resorbing, they become cloudy and less dense with an ill-defined shape and can migrate into adjacent structures.
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