Journal List > Korean J Obstet Gynecol > v.54(3) > 1088257

Cho, Kim, Jeon, Chun, Jeong, and Ji: A CASE OF AMNIOTIC BAND SYNDROME ASSOCIATED WITH ANENCEPHALY DEMONSTRATED USING THREE-DIMENSIONAL ULTRASOUND AT EARLY PREGNANCY

Abstract

Amniotic band syndrome (ABS) is entrapment of fetal parts by disrupted amnion and formation of fibrous amniotic band. As results, it causes a variety of fetal malformation involving the limbs, the craniofacial region and trunk. A visualization of free floating amniotic band is appropriate diagnostic method for ABS. Three dimensional (3D) and four dimensional (4D) ultrasounds are useful to diagnosis ABS. However prenatal diagnosis is difficult especially when they do not circulate a limb or cause single abnormality. In the cases of anencephaly, a differentiation between ABS and primary neural tube defect is important because the recurrence rate is significantly different. We reported a case that a fetal anencephaly with hydrops was diagnosed using prenatal 3D and 4D ultrasound then confirmed as amniotic band syndrome by autopsy at 12 weeks of gestation. After autopsy, we demonstrated amniotic band through 3D ultrasound review.

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Fig. 1.
3D ultrasound of fetus with acrania. Calvarium is absent and remaining brain tissue shows abnormal contour (white arrow).
kjog-54-155f1.tif
Fig. 2.
(A) Autopsy finding of fetus and placenta. Amniotic membrane is attached to the fetal head. Fetal head and trunk are tilted to the left side. (B) Autopsy finding of fetus and placenta shows that amniotic membrane is attached to the segmented left thumb. (C) The posterior view of fetus with amniotic band.
kjog-54-155f2.tif
Fig. 3.
Amniotic band between fetal head and placenta is demonstrated with review of three-dimensional surface rendering mode (white open arrow).
kjog-54-155f3.tif
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