Abstract
BACKGROUND: Immune checkpoint inhibitors (ICIs) have been proved having a better safety profile compared to platinum-based chemotherapy and have demonstrated encouraging anti-tumor therapeutic effects for patients with metastatic urothelial carcinoma (mUC). However, few studies have evaluated the efficacy of ICIs in patients with metastatic upper tract urothelial carcinoma (mUTUC). CASE REPORTS: Case 1 was a 71-year-old male patient diagnosed with left renal pelvic carcinoma, accompanied by a metastasis to the second lumbar spine. As the patient became refractory to chemotherapy, four cycles of camrelizumab, one of the ICIs, were administered, which helped to control the metastases and extend the patient's progression-free survival to five months. Case 2 was an 88-year-old female with middle and lower right ureter carcinoma with right iliac arteriovenous invasion. The patient received five cycles of camrelizumab plus vascular endothelial growth factor receptor 2 (VEGFR2) inhibitors and achieved stable disease. CONCLUSION: For patients who are ineligible for chemotherapy, immunotherapy might be a feasible treatment, regardless of whether or not they are given VEGFR2 inhibitors.