Emerging strategies: conservative management of upper tract urothelial carcinoma.

PURPOSE OF REVIEW: 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.

RECENT FINDINGS: 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.

SUMMARY: 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.