[Renal cell carcinoma in a patient with malignant lymphoma: a case report].

We herein report a case of renal cell carcinoma coexisting with malignant lymphoma. A 69-year-old male complained of an obstruction of the right nasal cavity due to a solid tumor in the paranasal sinuses. A biopsy of the tumor revealed diffuse, large cell and B cell type non-Hodgkin lymphoma. At the same time, just before the patient was scheduled to receive therapy, a left renal cell carcinoma was found. He therefore underwent a left radical nephrectomy.