“…Adenoid cystic carcinoma (ACC) is a relatively rare epithelial tumor that usually originates in the salivary glands, 1 , 2 submandibular glands, and minor salivary glands, but it can also occasionally occur in the mammary glands, cervix, Bartholin glands, sinuses, skin, 3 , 4 and even the larynx and trachea. 5 , 6 Tracheal adenoid cystic carcinoma (TACC) is a rare, low-grade, malignant tumor that originates in the glands of the tracheal and bronchial walls. The histological structure and biological behavior of TACC are similar to those of tumors found in the salivary glands, and TACC most commonly occurs in the upper trachea, being found in the joint cartilage in the posterior aspect of the trachea.…”