We present a case of amniotic band syndrome leading to encephalocele in one
triplet. In this case, discordance in feta I growth was observed at 9 week
s' gestation, and the amniotic membrane was not recognized in the sac of th
e smallest fetus. Thus, significant first-trimester growth discordance in m
ultifetal pregnancies suggests congenital anomalies, and examinations consi
dering amniotic band syndrome should be performed. Absence of the amniotic
membrane in the gestational sac may be a useful marker of amniotic band syn
drome. Copyright (C) 1999 S.Karger AG, Basel.