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Abstract
To assess the frequency of pulmonary changes in patients with rheumatoid arthritis (RA), we evaluated a subject group (all outpatients with RA visiting the hospital during a period of three consecutive days) by plain chest radiographs (CRs) and high-resolution computed tomography (HRCT). The study population consisted of 186 patients (32 men, 154 women; mean age 59.8 years), including 6 smokers or exsmokers. Chest radiography was performed on all patients. Seventy (Group A) patients demonstrated abnormal findings and 116 (Group B) did not. HRCT scans were performed on 69 of Group A and 54 of Group B. HRCT demonstrated centrilobular micronodules (n = 29; 23.6%), septal lines (n = 24; 19.5%), subpleural curvilinear shadows (n = 24; 19.5%), bronchiectasis (n = 21; 17.1%), dependent opacity (n = 14; 11.4%), nodules (n = 12; 9.8%), and honeycombing (n = 11; 8.9%). Ten (34%) of the patients with centrilobular micronodules also had bronchiectasis. The most frequent disorder was broncho-bronchiolar disease. Contrary to the CRs finding of no abnormality, HRCT detected pulmonary pathological findings in 40 of 54 patients (74.1%). Pulmonary diseases may be frequently latent, and HRCT is useful in evaluating them in patients with RA.