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Rheumatoid arthritis (RA) is a systemic disease manifested as a symmetric polyarthritis .This is the most common inflammatory arthritis affecting 0.5-2percentage of the worlds population frequently in the 25-55 year old age group and has female predominance . Lung involvement is a common extra-articular manifestation of RA conferring significant morbidity and mortality. Our study is focused to find out the pulmonary function in Rheumatoid arthritis patients and it is compared to normalfatcat:v7ct5bzy7zdubehkdxc2egidi4