A Case of Coexistence of an Arteriovenous Malformation and Hemangioma of the Maxillary Sinus

Abstract

Arteriovenous malformation or arteriovenous hemangioma of the maxillary sinus is relatively rare. The coexistence of the 2 lesions in the maxillary sinus is extremely rare. Such lesions may cause severe epistaxis due to arterial bleeding. A 73-year-old woman visited our department for recurrent and severe epistaxis, and a blood transfusion (400 mL) was required owing to the decrease in hemoglobin level (8.0 g/dL). On magnetic resonance imaging, the mass expanding in the right maxillary sinus had mixed high signal intensity on T1 magnetic resonance imaging with heterogeneous enhancement. The angiography showed no dilatation or meandering of the blood vessels of the relevant region and any apparent bleeding sites were not detected. An endoscopic nasal surgery could remove the maxillary sinus mass without preoperative embolization. Pathological examination clarified the coexistence of arteriovenous malformation and arteriovenous hemangioma in the mass. She has never complained of epistaxis for 6 months after the surgery.