Medical history: 60 year old male patient; pulmonary fibrosis in rheumatoid arthritisDescription: Honeycomb lung in subpleurally accentuated interstitial pulmonary fibrosis. Additional finding: In addition to a pre-existing pulmonary fibrosis, there is severe, diffuse alveolar wall damage in advanced organization. Clinical history: For 10 years, seropositive rheumatoid arthritis. Treatment with Methotrexat, prednisone, and Infliximab (TNF-inhibitor). Hospitalization due to respiratory distress; progressive respiratory deterioration.Source: ©PathoPic