Abstract
Purpose
To evaluate the use of real-time shear wave elastography (SWE) in the assessment of renal elasticity and the efficacy of steroid treatment in adult idiopathic nephrotic syndrome (INS).
Methods
This study included 120 patients with INS. Patients were divided into steroid-sensitive and steroid-resistant groups. Renal biopsy was performed. Thirty healthy subjects were recruited as controls. Young’s modulus (YM) of the renal parenchyma was measured by SWE. The YM values in each group were compared using glomerular sclerosis index (GI) and renal interstitial fibrosis (RIF).
Results
The YM values were significantly different between the INS and control groups, as well as between the steroid-sensitive and steroid-resistant groups (P < 0.05). Higher YM values were associated with steroid sensitivity. The area under the receiver operating characteristic curve for the YM value in the INS group vs. control group was 0.871 (95% CI 0.815–0.927) and in the steroid-resistant group vs. control, and steroid-sensitive groups was 0.836 (95% CI 0.765–0.908). The corresponding cut-off values were 7.96 and 10.73 m/s, with 81.7% and 86.0% sensitivities, 93.3% and 77.9% specificities, and Youden index 0.750 and 0.639, respectively. Spearman correlation analysis showed that the YM value in the renal parenchyma was positively correlated with GI (r = 0.631, P < 0.05) and RIF (r = 0.606, P < 0.05).
Conclusion
SWE technology is a potential method for non-invasive quantitative measurement of renal parenchyma stiffness to determine the pathological changes of INS renal parenchyma and evaluate the effectiveness of steroid therapy.
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Acknowledgements
We are indebted to the patients that were included in this study, whose participation made this study possible. We would like to thank Yan Xu, of the Department of Nephrology at the Affiliated Hospital of Qingdao University, and Shi-Hong Shao, of the Department of Pathology at the Affiliated Hospital of Qingdao University, for the selection of patients and the assessment of the pathologic results.
Funding
This research was supported by the Natural Science Foundation of Shandong Province (CN), ZR2014HM092.
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This study was approved by the institutional review board of Qingdao University, Shandong Province, P.R. China. All procedures performed in the studies involving human participants were in accordance with the ethics standards of the institutional and national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethics standards.
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Yang, X., Hou, FL., Zhao, C. et al. The role of real-time shear wave elastography in the diagnosis of idiopathic nephrotic syndrome and evaluation of the curative effect. Abdom Radiol 45, 2508–2517 (2020). https://doi.org/10.1007/s00261-020-02460-3
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DOI: https://doi.org/10.1007/s00261-020-02460-3