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Key Points

• Terminology
  
  • Monoarticular proliferation of hemorrhagic synovium
    
  • Occurs in joint, bursa, tendon sheath
    
  • PVNS: Diffuse, articular form
    
  • Giant cell tumor of the tendon sheath: Localized, extra-articular form
    
• Imaging
  
  • Radiograph: Large effusion ± associated erosions & subchondral cysts
    
  • MR: Effusion with synovial proliferation, low signal on all sequences & blooms on gradient echo
    
• Treatment
  • Synovectomy, radiation, arthroplasty
    

• Brant, William E. and Helms, Clyde A. Fundamentals of Diagnostic Radiology. 3rd ed, Lippincott Williams and Wilkins, Philadelphia, 2006. Volume 4. p. 1149.
  
• Manaster, B.J., et. al. Musculoskeletal Imaging: The Requisites. 3rd ed, Mosby, Philadelphia, 2007. Pp. 503-506.
  
• http://emedicine.medscape.com/article/394649-overview
  
• www.statdx.com
  

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