The trachea is a U-shaped structure that is composed of hyaline cartilage on the anterior and lateral walls, with the trachealis smooth muscle forming the posterior border of the trachea. The entire tracheal lumen is lined by ciliated pseudostratified

The trachea is a tube-like structure beginning at the base of the cricoid cartilage and extending to the carina. It has cervical and thoracic portions, separated at the level of the thoracic inlet above and below respectively. It includes 18 to 22 D-shaped

Primary tracheal tumors are uncommon but usually malignant in adults, accounting for about 0.2 % of all malignant tumors.[1][2] The estimated incidence of tracheal cancers is about 0.1 per 100,000 people per year. The largest report of primary tracheal