Diaphragmatic Amyloidosis Causing Respiratory Failure: A Case Report and Review of Literature

Figure 1

Cardiac amyloidosis. (A) Congo red stain of left ventricle showing focal positive staining (red-orange) of amorphous extracellular material, 400x. (B) Congo red stain of left ventricle showing apple-green birefringence under polarized light, diagnostic of amyloid, 400x.