A Case of Metastatic Renal Cell Carcinoma to the Maxillary Sinus Initially Presenting as Recurrent Epistaxis

Abstract

Metastatic neoplasms to the sinonasal tract are rare. Here, we report the case of a 74-year-old woman with no notable oncological history, presenting to the emergency department with a 3-week history of intermittent epistaxis. CT and MRI revealed a right-sided sinonasal tract mass with histopathological analysis revealing cells of clear cell renal cell carcinoma origin. Full-body CT revealed a 4.9-cm L renal mass for which cytoreductive nephrectomy was performed after immunotherapy. The patient experienced recurrence of the sinonasal mass 14 months from initial discovery, for which they continue to follow with our multidisciplinary cancer care team.