International Session 18　　Nasal Surgery 2

Glomangiopericytoma(GPC)represent 0 5 of sinonasal neoplasms.It is a highly vascular soft tissue tumor arising from pericytes-modified smooth muscle cells that surround capillaries in the sinonasal region.It is a clinically and histologically distinct from haemangiopericytomas. GPCs have borderline-low malignant potential.Despite recommendations for complete surgical excision of tumor, the local recurrence rate is 17.A 68-year-old lady presented with recurrent left epistaxis.Nasoendoscopy and imaging revealed a soft tissue lesion at the sphenoethmoidal recess.The tumor was excised endoscopically.As submucoperiosteal dissection was carried out from the septal mucosa towards the anterior face of the sphenoid, the tumor was found to be pedicled on the posterior septal branch of sphenopalatine artery.Despite adequate intraoperative haemostasis, massive epistaxis ensued a few hours after the operation, requiring repeat examination under anaesthesia and haemostasis.We discuss the anatomy and histology of glomangiopericytomas, therapeutic principles, the challenges of resection, and the current literature on pre-operative angioembolisation.