It has been reported that, compared with simple increased nuchal translucency, fetal
cases with septated cystic hygroma (CH) are more likely to face perinatal handicaps.
However, pediatric outcomes and proper prenatal counseling for this anomaly have not
yet been truly defined. We performed this study to determine pregnancy and pediatric
outcomes of fetuses with septated CH. We searched records for cases with septated CH
and collected data for structural abnormalities, karyotype analysis, and pregnancy
outcomes. Fetuses born with septated CH were also evaluated for their pediatric
outcomes. Sixty-nine fetuses with septated CH were enrolled in the study. Results
showed that chromosomal abnormalities were present in 28 fetuses (40.6%), and the
most common aneuploidy was Turner syndrome (n=14, 20.3%); 16 (23.2%) of the remaining
cases, in which aneuploidy was not found, had coexistent structural malformations; 25
(36.2%) cases had normal karyotype and morphology. The total number of live births
and infants with unfavorable neurologic follow-up were 13 (18.8%) and 2 (2.9%),
respectively. Septated CH is associated with poor perinatal outcomes; therefore,
karyotype analysis and ultrasonographic anomaly screening should be performed as
initial steps, and expectant management should be offered to couples with euploid
fetuses that have normal morphology.