The Society for Fetal Urology (SFU) has developed a grading system for hydronephrosis in a fetus or neonate.
Parameters seen on ultrasound:
(1) central renal echo complex and renal pelvis
(2) calices
(3) renal parenchyma
Appearance
Grade
central renal echo complex closely apposed (no hydronephrosis)
0
slight separation of the central renal echo complex
1
further dilatation of the renal pelvis
one to a few renal calices can be seen
2
renal pelvis dilated
multiple fluid filled calices throughout the kidney
renal parenchyma shows normal thickness
3
renal parenchyma over the calices is thinned
4
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Specialty: Nephrology, Clinical Laboratory
ICD-10: ,
