RT Journal Article SR Electronic T1 Etanercept-related extensive pulmonary nodulosis in a patient with rheumatoid arthritis. JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP 1590 OP 1592 VO 34 IS 7 A1 van Ede, Annelies A1 den Broeder, Alfons A1 Wagenaar, Michiel A1 van Riel, Piet A1 Creemers, Marjonne C W YR 2007 UL http://www.jrheum.org/content/34/7/1590.abstract AB OBJECTIVE: Although nodulosis is a common extraarticular manifestation of rheumatoid arthritis, accelerated pulmonary nodulosis is a rare event. The etiology of rheumatoid nodules is still unknown. Nodulosis is not necessarily associated with active joint inflammation, suggesting different pathogenic mechanisms for nodule formation and synovial tissue inflammation. We describe a patient with extensive pulmonary nodulosis, probably related to etanercept treatment. Our case emphasizes the need for careful monitoring for adverse events during treatment with biologicals, especially since the differential diagnosis often includes a broad spectrum of diseases.