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Increasing prenatal ultrasound (US) screening has led to increased detection of antenatal hydronephrosis (1%–5% of all pregnancies). The US measurement of maximal anterior-posterior renal pelvis diameter (APRPD) is one of the most commonly used measures for postnatal follow-up of these children, and some authors recommend threshold APRPD measurements to guide follow-up and management.1 Fortunately, many children will not require surgical management and adequate follow-up can be provided by the child’s paediatrician with routine US, but reliable and reproducible measures of renal pelvis dilatation are essential to guide management.
Over the years, we have seen many referrals for children with hydronephrosis who were thought to have increasing dilatation of …
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Provenance and peer review Not commissioned; internally peer reviewed.
Patient consent for publication Not required.
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