Laryngeal adenoid cystic carcinoma: a rare case report.

Laryngeal adenoid cystic carcinomas (LACC) are extremely rare and only account for less than 1% of all malignant laryngeal tumors. This tumor commonly occurs in the subglottic region of larynx, so dyspnea and hoarseness are its most common presenting symptoms. Adenoid cystic carcinoma is characterized by slow progression, late recurrence, and late distant metastasis. Total or partial laryngectomy is its treatment. Although it does not respond to radiotherapy completely, adjuvant radiotherapy or chemotherapy may be considered. In this study, we report a 41 year-old man, who had a rare recurrence of LACC, and we evaluate his clinical and pathologic characteristics.