Subacute IPA in rheumatoid nodules of the lung

Subacute IPA in rhematoid nodules of the lung. in a patient with rheumatoid arthritis. Histology sections stained with H&E

Varying fields from a case of rheumatoid disease complicated by Aspergillus infection. At the margin there are pallisaded histiocytes, as seen in a rheumatoid nodule, with abundant Aspergillus in the cavity.