Stages of interstitial pneumonitis in rheumatoid arthritis. Left panel: The histopathologic finding of permeation of the interaveolar septae by a lymphocytic infiltrate is consistent with lymphocytic interstitial pneumonitis in rheumatoid arthritis. Right panel: A more advanced stage of lymphocytic interstitial pneumonitis reveals germinal center formation and a focus of angiocentric granulomatous inflammation.
Courtesy of Cynthia Magro, MD.
Graphic 64424 Version 1.0
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