Fig. 13
From: Stepwise diagnostic algorithm for high-attenuation pulmonary abnormalities on CT
Secondary diffuse pulmonary ossification associated with systemic sclerosis-related interstitial lung disease in a 65-year-old woman. a CT image shows reticulation with cystic formation in the peripheral and bilateral lower lobes. b Bone window image shows high-attenuation nodules in the area of reticulation (arrows). c Photomicrograph (H-E stain) shows the tiny focus of ossification in the subpleural fibrotic lesion (arrow)