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Fetal Genitourinary Tract Anomalies: Evaluation, Operative Correction, and Follow-Up

From the Divisions of Maternal-Fetal Medicine, Ultrasound, and Pediatric Urology, The Johns Hopkins University School of Medicine, Baltimore, Maryland

Abstract

The prenatal diagnosis of a genitourinary anomaly was made in 53 fetuses. Sonographic findings, antenatal course, and postnatal treatment and outcomes were examined. No interventional therapy was undertaken in utero, and the natural history could be examined in the 44 of 53 (83%) who did not electively terminate their pregnancies. Twenty-three of the total 53 (43%) had unilateral disease and 30 (57%) had bilateral involvement. Thirty-five of 53 (66%) survived, with 22 undergoing operative therapy postnatally. In all but one of the 35 survivors, the anomaly was isolated to the genitourinary tract, and the majority of surviving fetuses had unilateral disease. Oligohydramnios was present in only three of 35 survivors, and none had severe oligohydramnios. Nine of 53 women underwent termination of pregnancy and nine others experienced a neonatal death. All 18 of their fetuses had bilateral disease, with oligohydramnios present in 14 (78%). All five fetuses with chromosomal abnormalities were found in this group of 18. The majority of fetuses with a genitourinary anomaly will do well postnatally. Pulmonary hypoplasia, extrarenal anomalies, and chromosomal defects are frequent findings in the minority with poor outcomes. A multidisciplinary approach to management of the pregnancy with a fetal genitourinary tract anomaly is essential to optimize outcome.