PMC9728224_01
CT image of the chest showing a cystic mass with a thickened wall in the apical segment of the left lower lobe
3586_Fig1.jpg
PMC9728224_01_3586_Fig1.jpg
f1-3586-1-31466-1-10-20221129
A CT scan showed a cystic mass with a thickened wall in the apical segment of the left lower lobe (Fig. 1).
(A) Lung parenchyma with abundant amorphous interstitial deposits, coloured brick red by Congo red; (B) lung parenchyma under polarized light with apple-green birefringence confirming amyloidosis
3586_Fig2.jpg
PMC9728224_01_3586_Fig2.jpg
f2-3586-1-31466-1-10-20221129
Congo red staining produced an orange colour with apple-green birefringence under polarizing microscopy, features pathognomonic of amyloidosis (Fig. 2).