Objectives: The sinonasal hemangiopericytomas (SNHPC) are rare tumors, originating from perivascular modified myoepithelial cells, and are often referred as glomangioperycitomas (GPC). These lesions have a rather benign local behavior, with rare metastasis rate but high recurrence rate. Histologically are classified as low-grade malignant lesions. The treatment is the complete excision of the lesion with intrao...