Arteriovenous malformation within left masseter muscle with arterial feeders from branches of left external carotid artery and venous drainage into retromandibular vein: A rare case report

Arteriovenous malformation (AVM) of the head and neck region is one of the rare vascular anomalies. It is a lethal benign disease, which is persistent and progressive in nature. With the increase in interest and recent advances in the diagnosis, management, and molecular characterization of these lesions have improved the treatment strategies. Because of its wide variability in its presentation, difficulty in diagnosing, and managing such malformation is a challenging task. We report an unusual case of AVM within left masseter muscle with arterial feeders from branches of left external carotid artery and venous drainage into retromandibular vein. The present case was of importance to diagnose at an early stage where the condition was asymptomatic and its association with high morbidity and mortality rate. This paper reviews the importance of early diagnosis and the complications associated with AVM of the head and neck region.