Psoriatic arthritis

Interstitial lung disease (ILD) is a severe extra articular manifestation of RA, with limited treatment strategies and poor prognosis. While for a long time RA treatments, such as methotrexate (MTX), have been considered a risk factor, recent data have shown the innocuity of MTX on lung disease (and in fact suggests it could reduce risk of ILD by increasing disease control and remission).