Abstract
INTRODUCTION: Intravascular large B-cell lymphoma is a rare and aggressive type of extranodal large B-cell lymphoma. Although intravascular large B-cell lymphoma can invade various organs, renal involvement has been rarely reported. Synchronous occurrence of intravascular lymphoma with renal cell carcinoma is extremely rare. We herein report a case of intravascular large B-cell lymphoma in a renal cell carcinoma incidentally detected by robot-assisted partial nephrectomy. CASE PRESENTATION: A 69-year-old female with recurrent fever lasting 4 years underwent robot-assisted partial nephrectomy for small renal cell carcinoma. Histological findings led to the diagnosis of intravascular large B-cell lymphoma, which involved the normal tissue of right kidney as well as clear cell renal cell carcinoma. She received six cycles of chemotherapy without major complications and achieved complete remission. CONCLUSION: We encountered a rare case of synchronous intravascular lymphoma with renal cell carcinoma.