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  • Title: The Impact of Prenatal Diagnosis of Selected Central Nervous System Anomalies for Prenatal Counselling Based on Significant Pregnancy Morbidity and Neonatal Outcomes.
    Author: Morton CC, Metcalfe A, Yusuf K, Sibbald B, Wilson RD.
    Journal: J Obstet Gynaecol Can; 2019 Feb; 41(2):166-173.e1. PubMed ID: 30316708.
    Abstract:
    BACKGROUND & OBJECTIVES: Prenatal screening and diagnostic imaging advances have led to an increased detection of CNS anomalies, including ventriculomegaly/congenital hydrocephalus (HCP), Dandy-Walker malformation (DWM), and myelomeningocele (MMC). Data on pregnancy outcomes and the impact of prenatal diagnosis on neonatal outcomes is limited. Our study aimed to provide data on obstetric and neonatal outcomes following prenatal diagnosis of one of three CNS anomalies. METHODS: A retrospective search of two databases in Alberta, Canada and NICU chart review of cases between 2001 and 2011was completed. Primary outcomes for each group were pregnancy outcome (live birth, stillbirth, and termination) and detection rate. Secondary outcomes were live and total birth prevalence, mode of delivery, GA at delivery, and length of NICU stay for inborn versus outborn patients. RESULTS: Prenatal detection rates were 91.6% (HCP), 83.4% (DWM), and 92.9 % (MMC). Termination rates were 30.2% (DWM), 34.2% (HCP), and 48.5% (MMC). Median GA (weeks, range) at diagnosis were 22 (17-38), 20 (12-37), and 20.5 (18-34) for HCP, DWM, and MMC, respectively. Rate of Caesarean section for fetal indication was 50.0%, 44.4%, and 42.9% for HCP, DWM, and MMC, respectively. Median NICU length of stay was longer for outborn patients than inborn patients and were as follows: (range) 33.0 (21-38) versus 8.5 (1-49) d (HCP), and 29 (29-57) versus 14 (2-75) d (DWM). CONCLUSION: This study provides termination rates, obstetric interventions, and NICU length of stay for prenatally-identified CNS anomalies. Collectively, this study assists prenatal counselling women with a fetus affected by a described CNS anomaly.
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