Eosinophilic Angiocentric Fibrosis of the Nasal Septum
(a) The early inflammatory lesion. It shows the dense inflammatory infiltrate with numerous eosinophils on a background of chronic inflammatory cells. (b) A fibroinflammatory lesion. It is characterized by a whorled appearance perivascular fibrosis which typically surrounded vessels at the center. The predominant infiltration cells are eosinophils. (c) A nodule with onion-skin-type perivascular fibrosis. There might be capillaries and venules in the center of whorly thickening fibrous. Now the blood vessel lumen is obliterated. The inflammatory infiltrate is scanty, but eosinophils remain in the lesion.