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Table 2 Ultrasonography, MRI, and x-ray findings in the MRI-examined hand

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

  Ultrasonography MRI X-ray
Bone erosions    
   MCP joint (total) 15% 16% 7%
PsA 18% 23% 12%
RA 15% 10% 0%
   PIP joint (total) 15% 7% 5%
PsA 20% 8% 7%
RA 0% 10% 5%
   DIP joint (total) 1% 3% 5%
PsA 2% 5% 8%
RA 0% 0% 0%
Bone proliferations    
   MCP joint (total) 4% 3% 0%
PsA 7% 5% 0%
RA 0% 0% 0%
   PIP joint (total) 7% 6% 0%
PsA 12% 10% 0%
RA 0% 0% 0%
   DIP joint (total) 7% 2% 4%
PsA 12% 3% 7%
RA 0% 0% 0%
Synovitis    
   MCP joint (total) 28% 27% NA
PsA 28% 35% NA
RA 55% 30% NA
   PIP joint (total) 22% 20% NA
PsA 27% 23% NA
RA 30% 25% NA
   DIP joint (total) 12% 5% NA
PsA 18% 7% NA
RA 5 % 5% NA
Tenosynovitis    
   MCP joint (total) 6% 13% NA
PsA 2% 12% NA
RA 25% 30% NA
   PIP joint (total) 20% 7% NA
PsA 18% 5% NA
RA 45% 20% NA
   DIP joint (total) 6% 6% NA
PsA 2% 3% NA
RA 25% 20% NA
Insertional changes    
   Extensor tendons (total) 6% 4% NA
PsA 8% 7% NA
RA 5% 0% NA
   Flexor tendons (total) 9% 4% NA
PsA 3% 0% NA
RA 35% 20% NA
Capsular/extracapsular changes (total) 18% 7% NA
PsA 22% 7% NA
RA 25% 15% NA
  1. One hundred fingers (100 MCP, 100, PIP, and 100 DIP joints) ('total') were examined. The distribution was as follows: psoriasis-associated arthritis (PsA) = 60; rheumatoid arthritis (RA) = 20; and healthy control persons (not shown) = 20. The imaging modalities were ultrasonography, magnetic resonance imaging (MRI), and projection radiography (x-ray). DIP, distal interphalangeal; MCP, metacarpophalangeal; NA, not applicable; PIP, proximal interphalangeal.