Emerging strategies: conservative management of upper tract urothelial carcinoma

Upper tract urothelial carcinoma (UTUC) is a rare yet aggressive malignancy, representing 5-10% of urothelial cancers. While radical nephroureterectomy (RNU) has traditionally offered excellent oncological control, it compromises renal function. Recent advancements have shifted the paradigm toward kidney-sparing strategies in select cases. This review highlights innovations in UTUC diagnosis and conservative management, focusing on emerging imaging techniques, noninvasive biomarkers, and minimally invasive treatments.

Advances in multiparametric MRI and radiomics have improved diagnostic accuracy and risk stratification. Moreover, noninvasive biomarkers - including circulating tumor DNA, microRNAs, and urinary methylation assays - provide promising tools for early detection and surveillance. Kidney-sparing approaches such as endoscopic laser ablation and segmental ureterectomy have demonstrated comparable oncologic outcomes in low-risk patients. Moreover, topical therapies, including intracavitary treatments like UGN-101, offer a promising minimally invasive option.

The conservative management of UTUC is evolving, driven by advancements in imaging, molecular diagnostics, and minimally invasive treatments. While kidney-sparing approaches are increasingly utilized in low-risk patients, further prospective studies are needed to validate their efficacy.