CRP and Cachexia: Few studies have demonstrated the prognostic roles of CRP level as one of the cachexia-related criteria for UTUC patients treated with RNU [3,23,24].These studies analyzed only the CRP level instead of using all cachexia-related criteria, which led to controversial results: some studies identified CRP level as a useful biomarker of poor prognosis in UTUC patients treated with RNU [23,24], while others reported the opposite [3].