Adenoid Cystic Carcinoma of Maxillary Sinus

Adenoid cystic carcinoma is a rare, slow-growing tumor that develops from the mucous glands’ epithelium. Most commonly, it develops in salivary glands and is rare in the nose and paranasal sinuses. It is common in the fourth to sixth decade of life, with a female preponderance. We present a case of a 40-year-old male who came with complaints of right-sided nasal obstruction, which was clinically and radiologically diagnosed as a mucocele. He underwent endoscopic excision of the mass. Histopathology was suggestive of adenoid cystic carcinoma. Later, the patient underwent right orbital floor-sparing total maxillectomy, followed by adjuvant radiotherapy.