Editing CUA: Antenatal hydronephrosis (2017) (section)

==== Urinary tract dilation (UTD) classification ====
* Proposed by SFU; combines elements of both APD and SFU
* Uses a 3-point system '''based on 6 different observations''' (renal pelvis APD, calyceal dilation, parenchymal thickness/appearance, ureteral dilation, and bladder abnormalities) to '''stratify patients into 3 risk categories''' (P1, P2, and P3) based on the most concerning of 6 US variables:
** UTD P1 (low-risk) with 10‒15 mm renal pelvis APD and central calyceal dilation to UTD P3 with renal pelvis APD >15 mm, peripheral calyceal dilation, parenchymal thinning, ureter dilation, and or bladder abnormality (high-risk).