Fig. 6From: Pulmonary alveolar proteinosis in a catPhotomicrographs of the lung. a The alveoli and bronchi are filled with eosinophilic material. Hematoxilin & eosin staining. b The cuboidal type II alveolar epithelial cells have a foamy appearance. Hematoxilin & eosin staining. c In the eosinophilic material crystals can be recognized. Hematoxilin & eosin staining. d No extensive fibrous tissue present. Masson’s trichrome stainingBack to article page