Fig. 2From: Diffuse parenchymal pulmonary amyloidosis associated with multiple myeloma: a case report and systematic review of the literatureHistopathology of lung biopsy. a Congo red staining showed marked thickening of the alveolar wall deposition of amorphous eosinophilic amyloid at the bronchial mucosa, pulmonary vessel wall and interstitium. b Congo red staining display apple-green birefringence in polarised lightBack to article page