https://doi.org/10.4081/aiua.2022.3.311
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External validation of Resorlu-Unsal stone score in predicting outcomes after retrograde intrarenal surgery. Experience from a single institution

Authors

Antonio Tufano
antonio.tufano91@gmail.com
Department of Maternal-Infant and Urological Sciences, "Sapienza" Rome University, Policlinico Umberto I Hospital, Rome, Italy.
Marco Frisenda
Department of Maternal-Infant and Urological Sciences, "Sapienza" Rome University, Policlinico Umberto I Hospital, Rome, Italy.
Antonio Rossi
“Cristo Re” Hospital, Rome, Italy.
Pietro Viscuso
Department of Maternal-Infant and Urological Sciences, "Sapienza" Rome University, Policlinico Umberto I Hospital, Rome, Italy.
Guglielmo Mantica
Policlinico San Martino, Genova, Italy.
Pierluigi Bove
San Carlo di Nancy Hospital, Roma, Italy.
Rosario Leonardi
Casa di Cura Musumeci- Gecas, Gravina di Catania (CT), Italy.
Alessandro Calarco
“Cristo Re” Hospital, Rome, Italy.

Objective: Pre-operative assessment of renal stones is essential in selecting treatment options and achieving high success rates for retrograde intrarenal surgery (RIRS). Several nephrolithometric scoring systems have been developed using pre-operative clinical data and stone characteristics. Resorlu-Unsal stone score (RUSS) is composed of four different parameters, and each of them adds 1 point to the final score. One point is added in patients with stone size > 20 mm, lower calyceal stones and infundibulo-pelvic angle < 45°, stone number > 1, and abnormal anatomy, respec-tively. RUSS categorizes patients into four distinct groups and aims to predict stone-free rates (SFR) after RIRS. We externally validated RUSS and evaluated its predictive accuracy.
Materials and Methods: We performed a retrospective analysis of patients who underwent RIRS for renal stones between January 2020 and December 2021. Patient age, pre-operative hydronephrosis, stone size, stone density as Hounsfield Unit
(HU), operative time and RUSS were investigated as potential preoperative predictive factors for stone-free status. RUSS was applied to all patients, and the nomogram was externally vali-dated. Area under the curve (AUC) was used for clinical validity assessment.
Results: The present study included a total of 79 patients. Mean patient age was 55.1 ± 15.4 years with a mean stone size was 14.2 ± 4.4 mm. Overall, 62/79 (78.4%) patients were stone free after the initial treatment. After applying RUSS, 36 (45.6%), 29 (36.7%), 10 (12.6%), and 4 (5.1%) patients had a score of 0, 1, 2, and 3, respectively. On multivariate logistic regression RUSS (OR = 0.220; 95%CI: 0.086-0.567; p = 0.002) was identified as the only predictor of postoperative stone-free status.
Conclusions: RUSS is a user-friendly scoring system that may predict postoperative stone-free rate after RIRS with great effi-cacy and accuracy.

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Qian X, Wan J, Xu J, et al. Epidemiological trends of urolithiasis at the global, regional, and national levels: a population-based study. Int J Clin Pract. 2022; 2022:6807203. DOI: https://doi.org/10.1155/2022/6807203
Zheng C, Xiong B, Wang H, et al. Retrograde intrarenal surgery versus percutaneous nephrolithotomy for treatment of renal stones > 2 cm: a meta-analysis. Urol Int. 2014; 93:417-424. DOI: https://doi.org/10.1159/000363509
Karakoyunlu N, Goktug G, Sener NC, et al. A comparison of stan-dard PCNL and staged retrograde FURS in pelvis stones over 2 cm in diameter: a prospective randomized study. Urolithiasis. 2015; 43:283-287. DOI: https://doi.org/10.1007/s00240-015-0768-2
Donaldson JF, Lardas M, Scrimgeour D, et al. Systematic review and meta-analysis of the clinical effectiveness of shock wave lithotrip-sy, retrograde intrarenal surgery, and percutaneous nephrolithotomy for lower-pole renal stones. Eur Urol. 2015; 67:612-616. DOI: https://doi.org/10.1016/j.eururo.2014.09.054
Zhao Z, Sun H, Zeng T, et al. An easy risk stratification to recom-mend the optimal patients with 2-3 cm kidney stones to receive ret-rograde intrarenal surgery or mini-percutaneous nephrolithotomy. Urolithiasis. 2020; 48:167-173. DOI: https://doi.org/10.1007/s00240-019-01134-0
Breda A, Angerri O. Retrograde intrarenal surgery for kidney stones larger than 2.5 cm. Curr Opin Urol. 2014; 24:179-183. DOI: https://doi.org/10.1097/MOU.0000000000000030
Calarco A, Frisenda M, Molinaro E, Lenci N. The active guidewire technique versus standard technique as different way to approach ureteral endoscopic stone treatment. Arch Ital Urol Androl. 2021; 93:431-435. DOI: https://doi.org/10.4081/aiua.2021.4.431
Xiao Y, Li D, Chen L, et al. The R.I.R.S. scoring system: An inno-vative scoring system for predicting stone-free rate following retro-grade intrarenal surgery. BMC Urol. 2017; 17:105. DOI: https://doi.org/10.1186/s12894-017-0297-0
Jung JW, Lee BK, Park YH, et al. Modified Seoul National University Renal Stone Complexity score for retrograde intrarenal surgery. Urolithiasis. 2014; 42:335-340. DOI: https://doi.org/10.1007/s00240-014-0650-7
Resorlu B, Unsal A, Gulec H, Oztuna D. A new scoring system for predicting stone-free rate after retrograde intrarenal surgery: the "resorlu-unsal stone score". Urology 2012;80:512-518. DOI: https://doi.org/10.1016/j.urology.2012.02.072
Elbahnasy AM, Shalhav AL, Hoenig DM, et al. Lower caliceal stone clearance after shock wave lithotripsy or ureteroscopy: the impact of lower pole radiographic anatomy. J Urol. 1998; 159:676-82. DOI: https://doi.org/10.1016/S0022-5347(01)63699-1
Aboumarzouk OM, Monga M, Kata SG, et al. Flexible ureteroscopy and laser lithotripsy for stones > 2 cm: a systematic review and meta-analysis. J Endourol. 2012; 26:1257-63. DOI: https://doi.org/10.1089/end.2012.0217
Hyams ES, Munver R, Bird VG, et al. Flexible ureterorenoscopy and holmium laser lithotripsy for the management of renal stone burdens that measure 2 to 3 cm: a multi-institutional experience. J Endourol. 2010; 24:1583-8. DOI: https://doi.org/10.1089/end.2009.0629
Selmi V, Sari S, Oztekin U, et al. External validation and com-parison of nephrolithometric scoring systems predicting outcomes of retrograde intrarenal surgery. J Endourol. 2021; 35:781-788. DOI: https://doi.org/10.1089/end.2020.0491
Molina WR, Kim FJ, Spendlove J, et al. The S.T.O.N.E. Score: a new assessment tool to predict stone free rates in ureteroscopy from pre-operative radiological features. Int Braz J Urol. 2014; 40:23-9. DOI: https://doi.org/10.1590/S1677-5538.IBJU.2014.01.04
Park J, Kang M, Jeong CW, et al. External validation and evalu-ation of reliability and validity of the modified Seoul National University Renal Stone Complexity Scoring System to predict stone-free status after retrograde intrarenal surgery. J Endourol. 2015; 29:888-93. DOI: https://doi.org/10.1089/end.2014.0901
Maugeri O, Dalmasso E, Peretti D, et al. Stone free rate and clin-ical complications in patients submitted to retrograde intrarenal sur-gery (RIRS): Our experience in 571 consecutive cases. Arch Ital Urol Androl. 2021; 93:313-317. DOI: https://doi.org/10.4081/aiua.2021.3.313
Sfoungaristos S, Gofrit ON, Mykoniatis I, et al. External valida-tion of Resorlu-Unsal stone score as predictor of outcomes after ret-rograde intrarenal surgery. Int Urol Nephrol. 2016; 48:1247-1252. DOI: https://doi.org/10.1007/s11255-016-1311-2
Özman O, Akgül HM, Basataç C, et al. RIRSearch Study Group. Recent scoring systems predicting stone-free status after retrograde intrarenal surgery; a systematic review and meta-analysis. Cent European J Urol. 2022; 75:72-80.

How to Cite

Tufano, A., Frisenda, M., Rossi, A., Viscuso, P., Mantica, G., Bove, P., Leonardi, R., & Calarco, A. (2022). External validation of Resorlu-Unsal stone score in predicting outcomes after retrograde intrarenal surgery. Experience from a single institution. Archivio Italiano Di Urologia E Andrologia, 94(3), 311–314. https://doi.org/10.4081/aiua.2022.3.311

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