| We evaluated the tracheal wall, whereas previous reports used bifurcation specimens from lobar or segmental bronchi. |
| The bronchi and bronchioles did not show epithelial changes, and the pulmonary arteries and arterioles were normal in appearance. |
| Emmprin has been found immunohistochemically in ciliated cells of normal bronchi and bronchi affected by squamous cell carcinoma. |
| The trachea, carina, right and left lobar and segmental bronchi were examined and were normal. |
| Similar to the control group, the large bronchi were lined with simple cuboidal cells and contained discrete glands within the underlying wall. |
| They are concentrated in the carina and primary bronchi, and are also believed to be cough receptors. |
