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Study Type - Therapy (case series) Level of Evidence 4 What's known on the subject? and What does the study add? Nephron-sparing surgery (NSS) is increasingly recognised as a preferred form of management for the incidentally detected small renal mass (SRM). Within the context of equivalent oncological outcomes, patients treated by NSS may have a survival advantage over those treated by radical nephrectomy (RN) through a reduced risk of chronic kidney disease and its associated cardiac morbidity. Despite this, according to Medicare data from the USA, a disproportionate number of patients with SRMs continue to be treated with RN instead of NSS. Similar data from Australia are not yet available. The present study explores the evolving management of SRMs at an Australian tertiary centre over a 5-year period. It utilises the R.E.N.A.L. Nephrometry Score to assess how lesion complexity has influenced surgical decision-making and charts the increasing use of NSS in the management of low-complexity renal masses at our centre. OBJECTIVE To examine recent trends in the use of nephron-sparing surgery (NSS) at our centre. Specifically, we sought to examine the process of surgical decision-making by applying the R.E.N.A.L. nephrometry scoring system to assess the complexity of lesions for which surgery was undertaken. [ABSTRACT FROM AUTHOR]