"What mm measurement of hydronephrosis in children is considered severe?"

Update Date: 2024-10-04 Source: Network

Pediatric Hydronephrosis Severity Classification

The severity of pediatric hydronephrosis is primarily classified into three main grading systems, each suitable for different clinical evaluations. Details are as follows:

APD Quantitative Grading (APD, Anteroposterior Diameter of Renal Pelvis)

Grade 1: No dilation of renal calyces, APD < 1cm;
Grade 2: No dilation of renal calyces, APD between 1cm and 1.5cm;
Grade 3: Mild dilation of renal calyces, APD > 1.5cm;
Grade 4: Moderate dilation of renal calyces, APD > 1.5cm;
Grade 5: Severe dilation of renal calyces, APD > 1.5cm.

SFU Semi-Quantitative Grading

Grade 0: No hydronephrosis detected;
Grade I: Mild separation of renal pelvis;
Grade II: Mild dilation of renal pelvis with visible dilation in a few renal calyces;
Grade III: Visible dilation in all renal calyces;
Grade IV: Visible dilation in all renal calyces with thinning of renal parenchyma.

UTD Grading

Low Risk: APD between 1cm and 1.5cm, with visible dilation of central renal calyces;
Medium Risk: APD > 1.5cm, in addition to findings in Low Risk, also includes dilation of peripheral renal calyces and ureter;
High Risk: APD > 1.5cm, in addition to findings in Medium Risk, also includes bladder abnormalities.

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