Calprotectin and TNF trough serum levels identify power Doppler ultrasound synovitis in rheumatoid arthritis and psoriatic arthritis patients in remission or with low disease activity
Ultrasound power doppler remission approximates histological and clinical remission in RA well, but the same cannot be said for PsA.
Assessment of histological remission in PsA appears out of reach by clinical metrics as well as ultrasound. Can MRI do better? But does it matter (in terms of longer term structural damage accruement)?