Yellow nail syndrome in rheumatoid arthritis: report of three cases.

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Abstract
The occurrence of the yellow nail syndrome in 3 patients with rheumatoid arthritis is reported. In 2 patients, the development of the syndrome was related to severe chest infections, and there was evidence of immunodeficiency, consisting in 1 case of a persistently low serum Ig[immunoglobulin]A level and in the other of a generalized marrow suppression. The 3rd patient gave a history of recurrent sinusitis and showed evidence of previous chest infections and pulmonary fibrosis, but has no gross evidence of immunodeficiency. There is 1 previous report of a patient with the yellow nail syndrome and rheumatoid arthritis.