Fetal Hydronephrosis as a Predictor of Neonatal Urologic Outcomes

作者：Shamshirsaz Alireza A; Ravangard Samadh F; Egan James F; Prabulos Ann Marie; Shamshirsaz Amirhoushang A; Ferrer Fernando A; Makari John H; Leftwich Heidi K; Herbst Katherine W; Billstrom Rachel A; Sadowski Allison; Gurram Padmalatha; Campbell Winston A

来源：Journal of Ultrasound in Medicine, 2012, 31(6): 947-954.

DOI：10.7863/jum.2012.31.6.947

• hydronephrosis
• pyelectasis
• sonography
• surgery

Objectives-The ability to predict surgically relevant fetal renal hydronephrosis is limited. We sought to determine the most efficacious second- and third-trimester fetal renal pelvis anteroposterior diameter cutoffs to predict the need for postnatal surgery. %26lt;br%26gt;Methods-We retrospectively reviewed the medical records of mothers and neonates who had a prenatal sonographic examination in our Perinatal-Pediatric Urology Clinic and received follow-up care. Hydronephrosis was defined as a renal pelvis anteroposterior diameter of 5 mm or greater in the second trimester and 7 mm or greater in the third trimester. Hydronephrosis was subdivided into mild, moderate, and severe. %26lt;br%26gt;Results-Of 8453 fetuses, 96 met the criteria and were referred to our clinic. Isolated hydronephrosis was diagnosed in 74 fetuses, of which 53 received postnatal follow-up evaluations. The areas under the receiver operating characteristic curves for predicting postnatal surgery in the second and third trimesters were 0.770 and 0.899, respectively. The second-trimester renal anteroposterior diameter threshold that best predicted postnatal surgery was 9.5 mm (sensitivity, 71.4%; specificity, 81.1%). The third-trimester threshold that best predicted postnatal surgery was 15.0 mm (sensitivity, 85.7%; specificity, 94.6%). %26lt;br%26gt;Conclusions-The fetal renal anteroposterior diameter on second- and third-trimester sonography is predictive of an increased risk for neonatal urologic surgery. Surgical risk is best predicted by a third-trimester renal anteroposterior diameter threshold of 15 mm.

• 出版日期2012-6