#Info: #Respiratory_Bronchiolitis–associated interstitial lung disease.

(A) Ground-glass attenuation with a mosaic pattern on high-resolution computed tomography.

(B) Note the dense aggregates of 
(1) Pigmented macrophages present in the air spaces around the terminal airways with 
(2) Variable bronchiolar metaplasia and 
(3) Interstitial fibrosis.