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Correlation between rheumatoid factor and peripheral eosinophil count in chronic eosinophilic pneumonia
Megumi Kudou1, Hirotaka Yasuba, Yoshiki Kobayashi
1Department of Respiratory Medicine, Takatsuki Red Cross Hospital, Osaka, Japan. megkudo@takatsuki.jrc.or.jp
Abstract:
The relationship between the blood level of rheumatoid factor (RF) and the peripheral blood eosinophil (Eo) count (white blood cellsx%Eo, Eo count) in a patient diagnosed with chronic eosinophilic pneumonia was evaluated from before the onset till resolution of the disease. RF levels correlated with Eo counts, and showed a strong correlation with the logarithmic value of the Eo counts (r=0.816). RF levels tended to become elevated earlier and decline later than Eo counts or abnormal X-ray shadows. We concluded that the RF level may reflect the activity of this disease. The mechanism of RF elevation in eosinophil-activated disorders needs to be clarified.
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