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Updated: May 18, 2026

Point-of-Care Kidney and Genitourinary Ultrasound in Adults: Image Acquisition
Published on: June 21, 2024
Fetal hydronephrosis: optimal renal pelvic measurement to increase detection rate for renal pathology
J Leader1, J Letshwiti, B Stuart
1UCD, Belfield, Dublin 4. joyce.leader@ucdconnect.ie
Abstract:
We reviewed the outcome of fetal hydronephrosis with a renal pelvic dilatation (RPD) of 4-7 mm to assess whether a RPD > 7 mm had a higher predictive value for renal pathology. 373 fetuses were diagnosed with hydronephrosis giving an incidence of 2.2%. The male: female ratio was 1.8:1. 5(1.34%) fetuses with antenatal hydronephrosis were diagnosed with Down Syndrome. 299 (91.7% fetuses with an RPD of 4-7 mm had resolved by 34 weeks gestation with 10 (3.1%) having moderate to severe hydronephrosis. The resolution rate for RPD > 7 mm was 60.7% (17) with 11 fetuses (39.3%) requiring long term follow up.
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