Abstract
Purpose
To determine the risk factors associated with major complications in patients with histologically confirmed Xanthogranulomatous pyelonephritis (XGP) who underwent nephrectomy.
Methods
A multicenter retrospective study was performed including patients who underwent nephrectomy between 2018 and 2022 with histopathological diagnosis of XGP. Clinical and laboratory parameters at the initial presentation were evaluated. Data on extension of XGP was recorded as per the Malek clinical-radiological classification. Characteristics of nephrectomy and perioperative outcomes were obtained. The primary outcome was major complications, defined as a CD ≥ grade 3 and the need for intensive care unit (ICU) admission. Secondary outcomes included the comparison of complications evaluating the nephrectomy approach (transperitoneal, retroperitoneal, and laparoscopic). A sub-analysis stratifying patients who needed ICU admission and Malek classification was performed.
Results
A total of 403 patients from 10 centers were included. Major complications were reported in 98 cases (24.3%), and organ injuries were reported in 58 patients (14.4%), being vascular injuries the most frequent (6.2%). Mortality was reported in 5 cases (1.2%). A quick Sepsis-related Organ Failure Assessment (qSOFA) score ≥ 2, increased creatinine, paranephric extension of disease (Malek stage 3), a positive urine culture, and retroperitoneal approach were independent factors associated with major complications.
Conclusion
Counseling patients on factors associated with higher surgical complications is quintessential when managing this disease. Clinical-radiological staging, such as the Malek classification may predict the risk of major complications in patients with XGP who will undergo nephrectomy. A transperitoneal open approach may be the next best option when laparoscopic approach is not feasible.
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Data availability
Data supporting Tables 1–5 and Supplementary Tables are not publicly available in order to protect patient privacy.
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JI Robles-Torres: protocol/project development, data analysis, manuscript writing/editing, data analysis; LR García-Chairez: protocol/project development, data collection or management; D Castellani: protocol/project development, data analysis, manuscript writing/editing; JV Enrriquez-Ávila: data collection or management; JF Monzón-Falconi: data collection or management, manuscript writing/editing; A Esqueda-Mendoza: data collection or management; JP Flores-Tapia: data collection or management; ML Wroclawski: data collection or management, manuscript writing/editing; HO Duarte-Santos: data collection or management; D Ragoori: data collection or management, manuscript writing/editing; N Gadzhiev: data collection or management, manuscript writing/editing; A Mahajan: data collection or management; S Kumar: data collection or management, manuscript writing/editing; M Farooq: Data collection or management; A Ganpule: Data collection or management; Y Tanidir: Data collection or management, Manuscript writing/editing; PN Maheshwari: data collection or management; VA Gite: data collection or management, manuscript writing/editing; MM Sinha: data collection or management; BK Somani: data collection or management, manuscript writing/editing; A Gutiérrez-González: protocol/project development, manuscript editing; V Gauhar: protocol/project development, Data analysis, Manuscript writing/editing.
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This retrospective study involving human participants was in accordance with the ethical standards of the institutional research committee of each center involved and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The Ethics Committee of each center was obtained for this study.
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Robles-Torres, J.I., García-Chairez, L.R., Castellani, D. et al. Perioperative outcomes and risk factors for major complications associated with nephrectomy for Xanthogranulomatous pyelonephritis: a multicenter study. World J Urol 41, 2905–2914 (2023). https://doi.org/10.1007/s00345-023-04415-x
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DOI: https://doi.org/10.1007/s00345-023-04415-x