How is severe unilateral antenatal hydronephrosis treated?

Updated: Dec 16, 2020
  • Author: Dennis G Lusaya, MD; Chief Editor: Bradley Fields Schwartz, DO, FACS  more...
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In newborns with severe antenatal unilateral hydronephrosis (renal pelvic diameter >15 mm in the third trimester), ultrasonography should be performed after the infant returns to birth weight (after age 48 h and within the first 2 wk of life).

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