Gastric metastasis from renal cell carcinoma 18 years after diagnosis of the primary tumor: A case report

Renal cell carcinoma is the most common malignancy arising in the kidney. It is known to metastasize to the lungs, lymph nodes, bone, liver and skin. Its treatment is mainly surgical resection. For unresectable cases or cases with multiple metastases, multi-disciplinary treatment is performed which combines surgical resection with radiation therapy, immunotherapy, or molecularly targeted drug therapy. As new treatments develop, particularly pharmacotherapies, cases are predicted to increase with metastases to organs which were previously reported infrequently. We herein report a case of renal cell carcinoma with metastasis to the stomach which occurred 18 years after resection of the primary cancer. A 71-year-old man presented to our hospital with the chief complaints of loss of appetite and melena. Upper gastrointestinal endoscopy and CT revealed a solitary gastric tumor. Wedge resection of the stomach was performed and the patient's QOL improved. The tumor was diagnosed histopathologically as metastasis to the stomach. Renal cell carcinoma rarely metastasizes to the stomach, and its prognosis is poor. Surgical resection should be considered in such cases depending on the condition of the disease.