RT Book, Section
A1 Bianchi, Diana W.
A1 Crombleholme, Timothy M.
A1 D'Alton, Mary E.
A1 Malone, Fergal D.
SR Print(0)
ID 1106397259
T1 Cystic Hygroma in Early Pregnancy
T2 Fetology: Diagnosis and Management of the Fetal Patient, 2e
YR 2015
FD 2015
PB McGraw-Hill Education
PP New York, NY
SN 978-0-07-144201-5
LK obgyn.mhmedical.com/content.aspx?aid=1106397259
RD 2024/04/20
AB Key  PointsSeptated  cystic  hygroma  in  the  first  trimester  is  defined  by  extensive  nuchal  thickening  extending  along  the  entire  length  of  the  fetal  back  and  in  which  septations  are  clearly  visible.This  finding  is  seen  frequently  in  the  first  trimester,  affecting  more  than  one  in  300  pregnancies.Given  the  50%  risk  of  fetal  aneuploidy,  definitive  diagnostic  testing  with  CVS  should  be  offered  immediately.Amongst  the  50%  of  cases  without  aneuploidy,  there  is  a  one  in  two  risk  of  major  structural  malformation,  typically  cardiac  or  skeletal  abnormalities.If  complete  prenatal  evaluation  reveals  no  evidence  of  additional  abnormality,  a  residual  risk  for  abnormal  pediatric  outcome  of  5%  should  be  quoted.