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Our results suggest that risk group stratification based on preoperative clinical T stage, voided urine cytology, and WBC counts may be useful for selection of UUT-UC patients for neoadjuvant chemotherapy. Prospective studies with larger numbers of patients and a longer follow-up period are needed to confirm our results.

UTUC with variant histology might be a phenotype of high-grade, locally aggressive advanced tumors rather than of systemic disease. Variant histology may be useful for selection of patients with pT ≥ 3 UTUC for adjuvant therapy. Prospective studies in a larger number of patients with a centralized pathological review are needed to confirm our results.

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