Pulmonary Alveolar Proteinosis in Setting of Inhaled Toxin Exposure and Chronic Substance Abuse

Figure 5

H&E stain of lung wedge biopsy sections at 100x (a), 200x (b), and 400x (c) magnifications showing intact alveolar walls, normal interstitium, and amorphous, eosinophilic granular material in the airspace.

(a)

(b)

(c)