“…7 In a minority of patients, the pleural involvement is associated with substantial morbidity and mortality. 8 There is little in the literature about whether the onset of pleural disease is an indication that a patient's rheumatoid arthritis will worsen. In the 1967 study, there were 22 instances of pleural effusion; 17 occurred more than five years after the onset of rheumatoid arthritis, and in 4 of these episodes, the patient's plural effusion was accompanied by a worsening of the rheumatoid arthritis.…”