From: Musculoskeletal ultrasound in symptomatic thumb-base osteoarthritis: clinical, functional, radiological and muscle strength associations
Population, n
93
Synovitis, n (%)
 0
41 (44.1)
 I
36 (38.7)
 II
16 (17.2)
 III
0
 Power Doppler, n (%)
13 (14.0)
Osteophyte, n (%)
3 (3.2)
25 (26.9)
65 (69.9)
Erosion on ultrasound, n (%)
2 (2.2)