Fig. 3
From: Pulmonary alveolar proteinosis and first successful whole lung lavage in Sri Lanka: a case report
a Cytology smear of lavage material shows scattered pinky brown casts and granular material. Hematoxylin and eosin stain, 100× magnification. Inset Periodic acid–Schiff staining shows these casts to be periodic acid–Schiff positive. b Open lung biopsy showed preservation of the alveolar architecture, mild interstitial chronic inflammation cells, and filling of alveolar spaces with granular amphophilic material with a few histiocytes and pigment