<unk> , a form of pleural effusion, is an uncommon complication of<unk>  arthritis, occurring in 2-3% of patients (Walker and Wright, 1967; Naylor, 1990)<unk>  pleura most often appears as an erythematous exanthema, discoloration, or gray discoloration and may grow into a tender, inflamed mass.<unk>  patency is a nonspecific condition characterized by inflammation of the aorta or valve, so as to alter the blood-flow to the aortic valve.<unk>  patency typically occurs in older patients, and there is a significant risk for severe, late complications such as aortic valve stenosis, heart valve stenosis.
Rheumatoid pleuritis
Pleural empyema
Pulmonary sequestration
Tuberculous pericarditis
Lung abscess
Malignant pleural effusion
Cryptogenic organizing pneumonia
Tuberculosis