• 1\) Patients after radical nephroureterectomy with full-length nephroureterectomy and pathologically confirmed cancer of the renal pelvis or ureter, AJCC staging (8th edition) containing one of the following factors: pT3-4, pN+; 2) Patients with creatinine eGFR \<60 min/L. or underlying disease refusing to tolerate chemotherapy.

• 18≤age≤80 years old; 4)Completion of abdominopelvic CT 4 weeks prior to enrolment. 5)Except for cutaneous non-melanoma and ductal carcinoma in situ of the breast, the patient has not suffered from any other malignant disease within the last 5 years; 6)Willing to participate in perfecting the necessary examinations and follow-up visits for the sake of the study, and willing to provide written informed consent.

⁃ All of the above need to be fulfilled:

⁃ Expected survival \> 6 months; KPS \> 70 points; Leukocytes ≥ 3.5 x 109/l,Neutrophils ≥ 1.5 x 109/l, Platelets ≥ 100.0 x 109/l, Haemoglobin ≥ 90g/l.