گزارش یک مورد متاستاز سرطان کلیه به سینوس‌های پارانازال

Metastatic tumors in the nose and paranasal sinuses are rare. In the present paper, a 68 year old man with metastatic renal cell carcinoma to the left frontoethmoidal region 4 years after initial nephrectomy is presented ..Pathologic diagnosis of the case was Clear Cell Carcinoma. The patient complained of mild nasal obstruction and intermittent  epistaxis, but the significant symptom was  bulging  in medial canthus from 20 days before. Clinical and endoscopic examinations of the left nasal cavity revealed a vascular mass in the axillary of the middle turbinate and anterior ethmoidal sinuses extending to the left orbital cavity .  The patient was treated with partial endoscopic sinus resection and chemoradiotherapy. He had a complete clinical response without any significant complications and recurrence of the tumor after 6 months follow up using interanasal endoscopic examination.