a case report of benign fibrous histiocytoma of paranasal sinuses and role of transnasal endoscopy in its treatment

benign fibrous histiocytoma is a rare tumor of nose and paranasal sinuses that originates from histiocytes. ‎‎the main symptoms of patients are nasal obstruction and nasal mass. ‎our patient was presented with chief complaints of nasal obstruction and rhinorrhea non responsive to antibiotic treatment. in computed tomography scan a giant mass in left maxillary sinus and ipsilateral nasal cavity was seen. after en bloc resection of tumor by transnasal endoscopic approach all of patient’s symptoms were alleviated. the pathologic report was benign fibrous histiocytoma. ‎because of excellent visualization, it seems that transnasal endoscopic approach is the method of choice for resection of these benign tumors.