A metastatic ureteral tumor successfully treated with multidisciplinary therapy including radiotherapy.

Introduction: Metastatic ureteral tumors are difficult to diagnose pathologically. Treatment is only available for the primary disease, and prognosis is generally poor.

Case Presentation: A 63-year-old patient with a history of gastric cancer presented with asymptomatic right-sided hydronephrosis.

Remarkable antitumor effect of nivolumab in a patient with metastatic renal cell carcinoma previously treated with a peptide-based vaccine.

Introduction: The safety and efficacy of combination therapy comprising immune checkpoint inhibitors and cancer-specific peptide vaccines have not yet been established.

Case Presentation: A 71-year-old female metastatic renal cell carcinoma patient with multiple lung and pleural metastases. She had been treated with interferon alpha, sunitinib, axitinib, and pazopanib sequentially, but no clinical efficacy was observed.