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+Modality
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==Planning==
===Choice of modality===
*Preferably '''[[ultrasonography of the urinary system]]'''.
==Evaluation==
===Grading===
The Society of Fetal Ultrasound has developed a grading system for hydronephrosis, initially intended for use in neonatal and infant hydronephrosis, but it is now used for grading hydronephrosis in adults as well:<ref>{{cite web|url=https://www.uptodate.com/contents/overview-of-fetal-hydronephrosis|title=Overview of fetal hydronephrosis. Version Version 29.0|author=Laurence S Baskin|website=UpToDate|accessdate=2017-04-25}} Last updated Apr 20, 2017</ref>
* Grade 0 – No renal pelvis dilation. Cutoff values for different patient populations are:
