Renal clear cell carcinoma metastatic to the nose and paranasal sinuses.

Two cases of metastatic renal clear cell carcinoma to the nose and the paranasal sinuses are reported. Case 1 was a 73-year-old man with metastases to the bilateral maxillas and left cervical lymph nodes. These metastatic lesions were surgically eliminated together with the primary renal cancer. Case 2 was a 48-year-old man with a right maxilloethmoidal metastasis. Because of severe repeated bleeding and profound necrosis, conclusive diagnosis was hard to obtain. In both cases primary renal carcinoma was detected after the nasal tumors were confirmed to be a metastatic clear cell carcinoma. Early diagnosis and surgical removals of both primary and metastatic tumors are important to prolong the patient's life. When persistent epistaxis with intranasal necrotic mass occurs, the possibility of metastatic renal clear cell carcinoma should be considered.