Hydronephrosis in Infants - SFU grading - Society of Fetal Urology
Hydronephrosis in infants is divided into five grades that were standardized by the Society of Fetal Urology. The grading is usually based on ultrasound, ev. intravenous urography.
| Grade | Description |
|---|---|
| Grade 0 | no splitting of renal sinus |
| Grade I | urine visible in renal pelvis only |
| Grade II | urine fills intrarenal pelvis, extrarenal pelvis, major calyces are dilated |
| Grade III | Grade II + minor calyces are uniformly dilated without thinning of parenchyma |
| Grade IV | Grade III + thinning of parenchyma |
References:
1. Fernbach SK, Maizels M, Conway JJ. Ultrasound grading of hydronephrosis: Introduction to the system used by the society for fetal urology. Pediatr Radiol. 1993 Oct 1;23(6):478–80.
2. Ross SS, Kardos S, Krill A, Bourland J, Sprague B, Majd M, et al. Observation of infants with SFU Grades 3–4 hydronephrosis: Worsening drainage with serial diuresis renography indicates surgical intervention and helps prevent loss of renal function. Journal of Pediatric Urology. 2011 Jun;7(3):266–71.
3. Fernbach SK, Maizels M, Conway JJ. Ultrasound grading of hydronephrosis: Introduction to the system used by the society for fetal urology. Pediatr Radiol. 1993 Oct 1;23(6):478–80.
4. Kim S-Y, Kim M-J, Yoon CS, Lee MS, Han KH, Lee M-J. Comparison of the reliability of two hydronephrosis grading systems: the Society for Foetal Urology grading system vs. the Onen grading system. Clin Radiol. 2013 Sep;68(9):e484–490.
5. Keays MA, Guerra LA, Mihill J, Raju G, Al-Asheeri N, Geier P, et al. Reliability assessment of Society for Fetal Urology ultrasound grading system for hydronephrosis. J Urol. 2008 Oct;180(4 Suppl):1680–1682; discussion1682–1683.