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Table 1 Ultrasonography observations in psoriasis-associated arthritis and rheumatoid arthritis patients and healthy control persons

From: Ultrasonography, magnetic resonance imaging, radiography, and clinical assessment of inflammatory and destructive changes in fingers and toes of patients with psoriatic arthritis

  All Psoriasis-associated arthritis Rheumatoid arthritis Healthy control persons
Bone erosions     
   MCP joint 12% 13% 18% 3%
   PIP joint 12% 14% 3% 13%
   DIP joint 3% 4% 0% 0%
   MTP joint 15% 15% 24% 6%
Bone proliferations     
   MCP joint 4% 6% 0% 0%
   PIP joint 8% 12% 3% 0%
   DIP joint 9% 13% 0% 5%
   MTP joint 5% 5% 4% 6%
Synovitis     
   MCP joint 22% 19% 50% 3%
   PIP joint 13% 13% 23% 3%
   DIP joint 18% 22% 23% 3%
   MTP joint 44% 43% 56% 34%
Tenosynovitis     
   MCP joint 7% 4% 23% 0%
   PIP joint 18% 16% 40% 0%
   DIP joint 6% 2% 20% 3%
Insertional changes     
   Extensor tendons 8% 12% 3% 3%
   Flexor tendons 8% 7% 18% 0%
Capsular/extracapsular changes 9% 7% 25% 0%
  1. Two hundred fingers (196 MCP, 199 PIP, and 200 DIP joints) and 250 MTP joints were examined. The distribution was as follows: psoriasis-associated arthritis = 60 fingers (56 MCP, 59 PIP, and 60 DIP joints) and 150 MTP joints; rheumatoid arthritis = 20 fingers (20 MCP, 20 PIP, and 20 DIP joints) and 50 MTP joints; and healthy control persons = 20 fingers (20 MCP, 20 PIP, and 20 DIP joints) and 50 MTP joints. DIP, distal interphalangeal; MCP, metacarpophalangeal; MTP, metatarsophalangeal; PIP, proximal interphalangeal.