Chronic eosinophilic pneumonia in RA

Chronic eosinophilic pneumonia (CEP), an interstitial lung disease, is characterized by either elevated eosinophil counts in the bronchoalveolar lavage (BAL) or is associated with eosinophilic infiltration of the lung parenchyma. CEP rarely occurs in association with rheumatoid arthritis (RA). The coexistence of CEP and RA is rare, and CEP as the initial manifestation of RA is particularly unusual; physicians in the United States encountered such a case.