Anencephaly in a monochorionic monoamniotic twin pregnancy

Case contributed by Dr Alexandra Stanislavsky


Review of pregnancy. 14 weeks and 6 days gestational age.

Patient Data

Age: 20 years
Gender: Female

Monochorionic monoamniotic twin pregnancy (note entangled umbilical cords). 

Twin 1 with anencephaly; no other morphologic abnormality is seen.

Twin 2 is morphologically normal with biometry concordant with dates.

Posterior placenta, closed cervix.

Case Discussion

Monochorionic, monoamniotic twin pregnancy. One twin with anencephaly and the other twin normal. 

Laser cord ligation was offered to the patient at the time of examination. Pregnancy outcome, however, is not known.

Twin pregnancy is associated with a higher rate of non-syndromic anomalies than singleton pregnancy, and this is particularly notable in monochorionic twins. 

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Case information

rID: 68827
Published: 16th Jun 2019
Last edited: 14th Aug 2019
System: Obstetrics
Tag: twins
Inclusion in quiz mode: Included

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