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Omphalocele: comparison of outcome following prenatal or postnatal diagnosis
T E Cohen-Overbeek1, W H Tong, T R Hatzmann
1Department of Obstetrics and Gynaecology, Division of Obstetrics and Prenatal Medicine, Erasmus MC, Rotterdam, The Netherlands. t.cohen@erasmusmc.nl
Objectives:
To assess the impact of prenatal compared with postnatal diagnosis on outcome for liveborn infants with an isolated or with a non-isolated omphalocele.
Methods:
This was a retrospective analysis of 101 prenatally and 45 postnatally diagnosed cases of omphalocele. Cases were collected from the ultrasound database of the Division of Obstetrics and Prenatal Medicine and the patient database of the Department of Pediatric Surgery.
Results:
Following confirmation at delivery or autopsy, prenatally diagnosed omphaloceles included 21 isolated cases, 44 non-isolated cases with a normal karyotype and 36 non-isolated cases with an abnormal karyotype. Of the prenatally diagnosed apparently isolated cases (n = 31), 12 (39%; 95% CI, 22-58%) revealed associated anomalies after delivery. Liveborn infants with an isolated omphalocele had significantly worse short-term morbidity following prenatal diagnosis (n = 14) compared with diagnosis at birth (n = 29), having a lower gestational age at delivery, lower Apgar scores, longer duration of ventilation and parenteral nutrition, more readmissions and a longer hospital stay. The prenatally diagnosed subset contained more infants with a giant omphalocele (9/14 vs. 3/29, P = 0.001) and liver herniation (8/14 vs. 6/29, P = 0.02). The outcome of liveborn infants with a non-isolated omphalocele diagnosed prenatally (n = 17) was not different from that of those diagnosed at birth (n = 16), except for a greater need for ventilation and parenteral nutrition in the prenatal subset.
Conclusion:
When counseling patients with a prenatal diagnosis of isolated omphalocele, it is important to remember that over one third could turn out to have associated anomalies. Liveborn infants with an isolated omphalocele detected prenatally have worse short-term morbidity than do cases detected at birth. Those with non-isolated omphaloceles detected prenatally have an increased need for ventilation and parenteral nutrition compared with those detected at birth.
