27 day old male with right duplex kidney and hydronephrosis. Evaluate for interval change. BLADDER  Wall Thickness: Normal  Contents: Distended and normal. Distal Ureter -- SFU Grade**  Right: Not Identified  Left: Not Identified   Ureteral Jets Right: Not observed  Left: Not observedKIDNEYS  Cortical Echogenicity: Normal   Medullary Echogenicity: Normal   Pelvicaliceal System -- SFU Grade*  Right: Duplex right kidney: Grade 2 in both the upper and lower pole moieties. Left: 1  Length*** Right: 5.8 cm Left: 5.0 cm   Mean for age: 4.2 cm  Range for age: 4.0 - 6.0 cmADDITIONAL OBSERVATIONS: Duplex right kidney.
Duplex right kidney with grade 2 hydronephrosis of both the upper and lower moieties. Grade 1 left-sided hydronephrosis.*SFU grading system: Grade 0: No hydronephrosis. Grade 1: The renal pelvis is visualized. Grade 2: A few but not all of the calices are identified in addition to the renal pelvis. Grade 3: Virtually all the calices are seen. Grade 4: Grade 3 and parenchymal thinning. **SFU grading system retrovesical ureter: Grade 0: No ureteral dilatation. Grade 1: Ureter less than 7 mm. Grade 2: Ureter is 7-10 mm. Grade 3: Ureter is over 10 mm. Fernbach SK, Maizels M, Conway JJ. Ultrasound Grading of Hydronephrosis: Introduction to the System used by the Society for Fetal Urology. Pediatric Radiology (1993) 23: 478-480.***Rosenbaum DM, Korngold E, Teele RL. Sonographic Assessment of Renal Length in Normal Children. AJR Am J. Roentgenol (1984) 142:467-469