Evaluation of Fetal Central Nervous System Anomalies; Perinatology Council Data of a Reference Center

INTRODUCTION: Central nervous system (CNS) anomalies are the second most common congenital malformations detected during antenatal period. Rates of prenatal diagnosis are aroung 96% in anencephaly, but drops down to approximately 14 % in migration anomalies.We aimed to determine the frequency and features of CNS anomalies evaluated in the perinatology council of our hospital where high-risk pregnancies were discussed and also to emphasize the importance of antenatal diagnosis. METHODS: Pregnant women, with a CNS anomaly detected in their fetus, who were evaluated between January 2019-December 2019 in the perinatology council of Tepecik Training and Research Hospital were included in the study. Retrospectively, the records of the cases were examined, prenatal, and maternal risk factors at the time of council session, the council decision and the results were recorded. Statistical analyzes were done using SPSS 20.0 program. RESULTS: Data of 1272 pregnant women were evaluated in the study, and 261 cases (20.5%) with CNS anomalies were detected. A total of 129 pregnant women were excluded from the study because follow-up of these patients were not realized in our center or they didn’t give birth yet.. Totally, 132 pregnant women were included in the study. The mean maternal age was 26.99±6.50 (14-42) years, the mean gestational age was 22.63±7.08 (10.4-38.6) weeks. Most common CNS anomalies detected were neural tube defects (n=54; 40%), hydrocephalus/ventriculomegaly (n=36; 27%), migration defects (n=21; 15%) and cerebellar malformations (n=9; 6%). Termination of pregnancy was decided for 29.8% (n=78) of pregnant women, but realized only for 62 pregnancies. Among pregnancies which were decided to be continued due to the fact that gestational week was 22 weeks or more (n=51), had fetuses with neural tube defects (n=25; 50%) and hydrocephalus/ventriculomegaly (n=36; 27%) with poor prognosis. DISCUSSION AND CONCLUSION: As the anomalies with high morbidity and mortality were referred to our hospital after the 22nd gestational week, termination option could not be offered to these pregnancies. High-risk pregnancies should be directed to perinatology centers in the early period so that this option can be presented to the family, appropriate follow-up and treatment of life-compatible ones.