Breaking New Ground: Unraveling Sinonasal Hemangiopericytoma Through a Rare Case Series on Endoscopic Excision and Postoperative Monitoring.

Hemangiopericytoma is a rare vascular neoplasm derived from pericytes, with uncertain malignant potential. It mainly occurs in the retroperitoneum and lower extremities, with a lower incidence in the head and neck region and nasal cavity. Diagnosis is aided by histopathological examination and immunohistochemistry. Surgical excision is the preferred treatment, with different approaches depending on tumour size. Endoscopic excision is suitable for small tumours, while larger ones may require external approaches. The recurrence rate is approximately 25%, emphasizing the importance of long-term follow-up. Our study aims to discuss a rare series of sinonasal hemangiopericytoma cases, their clinical presentation, and their management. In this study, we are discussing the prospective study of six cases of sinonasal hemangiopericytoma that were presented to a tertiary hospital, from June 2017 to June 2023, with complaints of nasal obstruction and bleeding episodes. They were assessed with a detailed history, blood investigations, radiological investigations, and diagnostic nasal examination, and underwent endoscopic surgical excision of the nasal mass, with the diagnosis confirmed by histopathological examination and immunohistochemistry. All cases were followed up for 1 year postoperatively, except one case which missed follow-up after 6 months and with no postoperative complications and recurrences. All six cases came with complaints of nasal obstruction and bleeding from the nasal cavity. All six cases underwent endoscopic surgical excision of the tumour and were followed for 1 year in five cases; one case missed follow-up after 6 months of postoperative follow-up, but no recurrence was noted in all the cases. For small-sized hemangiopericytoma tumours, endoscopic excision offers benefits such as improved visualization, easy resection, preservation of the normal anatomical structure, and maintenance of physiological function in the sinonasal cavities. With a recurrence rate of approximately 25%, surgical excision and long-term follow-up play essential roles in successful tumour management. [ABSTRACT FROM AUTHOR]