Figure 3: A case of pulmonary amyloidoma showed abundant blue amorphorous material and some cholesterol crystals. (A-B, Diff-Quik, 100x), and core needle tissue showed abundant eosinophilic acellular material (C, H&E, 100x), and Congo red stain showed classic “apple-green” birefringence of amyloid (D, Congo Red stain with polarization, 200x).