Disclosures. NONE. Objectives. Natural History of Rheumatoid lung diseasePatterns of Rheumatoid lung disease Risk Factors of Rheumatoid lung diseaseDifferentiating MTX lung from RA lungClinical Implications. Case 1. 79 yo WF with seropositive erosive nodular (RF 122, CCP 116) RA dx\'d in 1960 (age 35)Previous RA Treatments:NSAIDSIM GoldPrednisone (2-5mg/day)MTX 7.5 mg (for 3 months in 1999)Arava 20 mg (2003).