There is progression of the usual interstitial pnuemonia pattern with more inter and intralobular septal thickening and honeycombing more severe toward the lung bases and the periphery. There is more patchy ground glass opacities especially at the lung bases and subpleurally. Interval development of small centrilobular and peribronchial nodules, and peribronchial thickening. The findings are highly suggestive of follicular bronchiolitis in the setting of rheumatoid arthritis.