Joint Involvement in Primary Sjögren’s Syndrome: An Ultrasound “Target Area Approach to Arthritis”
Figure 1
“Target area approach to arthritis” in the hands of patients with primary and secondary Sjögren’s syndromes. The figure shows the frequency (percentage) of synovitis (a) and erosions (b). The upper digit corresponds to patients with primary Sjögren’s syndrome, whereas the lower digit corresponds to patients with RA-associated Sjögren’s syndrome. *.
