| Epithelium |
| Atrophy of serous and mucinous glands |
| Loss of cilia and goblet cells |
| Metaplasia of pseudostratified columnar to islands of squamous |
| Lymphoplasmacytic inflammatory cell infiltrate |
| Submucosa |
| Inflammatory cell infiltrate |
| Endarteritis obliterans |
| Dilation of capillaries |
