title: Primary adenoid cystic carcinoma of the trachea with thyroid invasion: a case report and literature review.
abstract: Primary adenoid cystic carcinoma (ACC) of the trachea with thyroid invasion is very rare. In this report, we present a 46-year-old man with primary ACC of the trachea with thyroid invasion. ACC invasion of the thyroid is very rare and is easily misdiagnosed. The patient sought consultation due to a 6-month history of dysphagia and associated dyspnea. A contrast-enhanced computed tomography scan obtained at the time of admission revealed bilateral thyroid masses and tracheal wall thickening. The thyroid masses were fused to the trachea and the esophagus without discernible borders, intraoperatively. Frozen pathology suggested poorly differentiated cancer, and a bilateral partial thyroidectomy was performed. Postoperative pathology revealed primary tracheal ACC with thyroid invasion. The patient died 1 month after surgery. We have also summarized the literature on the clinical presentation, diagnosis, and treatment of thyroid-invasive ACC.
authors: Department of General Practice.
authors: Dianjun
authors: D
authors: Qi
authors: Department of Breast Surgery.
authors: Liang
authors: L
authors: Feng
authors: Department of Radiology.
authors: Jian
authors: J
authors: Li
authors: Department of Anorectal Surgery, The First Affiliated Hospital of China Medical University.
authors: Bing
authors: B
authors: Liu
authors: Department of Pathology, The First Affiliated Hospital and College of Basic Medical Sciences of China Medical University, Shenyang, People's Republic of China.
authors: Qingfu
authors: Q
authors: Zhang
keywords: adenoid cystic carcinoma; thyroid; trachea