Abstract

Upper urinary tract urothelial carcinoma (UTUC) represents a minor subgroup of malignancies arising in the urothelium of the renal pelvis or ureter. The estimated annual incidence is around 2 cases per 100,000 people, with a mean age at diagnosis of 73 years. UTUC is more frequently diagnosed in an invasive or metastatic stage. However, even though the incidence of UTUC is not high, UTUC tends to be aggressive and rapidly progressing with a poor prognosis in some patients. A significant challenge in UTUC is ensuring accurate and timely diagnosis, which is complicated by the non-specific nature of symptoms seen at the onset of disease. Moreover, there is a lack of biomarkers capable of identifying the early presence of the malignancy and guide-tailored medical treatment. However, the growing understanding of the molecular biology underlying UTUC has led to the discovery of promising new biomarkers. Among these biomarkers, there is a class of small non-coding RNA biomarkers known as microRNAs (miRNAs) that are particularly promising. In this review, we will analyze the main characteristics of UTUC and focus on microRNAs as possible novel tools that could enter clinical practice in order to optimize the current diagnostic and prognostic algorithm.

Highlights

  • Urological Research Institute, Division of Experimental Oncology, IRCCS San Raffaele Scientific Institute, Faculty of Medicine and Surgery„ Università Vita-Salute San Raffaele, 20132 Milan, Italy

  • Upper urinary tract urothelial carcinoma (UTUC) is a minor subgroup of malignancies arising in the urothelium of the renal pelvis or ureter (5–10%) [1]

  • We summarize the most relevant findings of published research regarding miRNAs as candidate biomarkers of UTUC

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Summary

Introduction

Urological Research Institute, Division of Experimental Oncology, IRCCS San Raffaele Scientific Institute, Faculty of Medicine and Surgery„ Università Vita-Salute San Raffaele, 20132 Milan, Italy. The estimated annual incidence is around 2 cases per 100,000 people, with a mean age at diagnosis of 73 years. The growing understanding of the molecular biology underlying UTUC has led to the discovery of promising new biomarkers. Among these biomarkers, there is a class of small non-coding RNA biomarkers known as microRNAs (miRNAs) that are promising. The estimated annual incidence is around two cases per 100,000 people [2], with a mean age at diagnosis of

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