Abstract
Angiosarcomas are malignant tumors originating from the vascular endothelial cells. Comprising only 2％ of soft tissue sarcomas, primary angiosarcomas of the oral cavity are extremely rare.
A 68-year-old woman presented with massive bleeding from necrotizing tumor of the left maxillary gingiva and was brought by ambulance due to hemorrhagic shock to our hospital. Upon arrival, we tried to stop the bleeding from the tumor with local hemostatics after tracheostomy. However, as it was not enough, we ligated the external carotid artery and could stop the bleeding. A week later, she had bleeding from the tumor again. As it was difficult to control, we performed an emergency infrastructure maxillectomy. The resected tumor was diagnosed as angiosarcoma of maxillary gingiva and adjuvant radiation therapy was performed. One year has passed since the initial treatment and she survives with no recurrence.
