Schmid O, Hagen A, Sarioglu N, Hopp H, Entezami M, Albig M, Becker R
Charité--Campus Benjamin Franklin, Department of Obstetrics and Gynecology, Berlin, Germany.
Ultraschall Med. 2006 Aug;27(4):384-8. doi: 10.1055/s-2005-858357. Epub 2006 Apr 13.
In 1:50 000 to 1:100 000 births, conjoined twins occur, caused by incomplete division of the embryonic disc more than 13 days after fertilisation. We present a case of cephalothoracopagus janiceps, a very rare form of conjoined twins, which was diagnosed at 13 weeks of gestation. Three-dimensional and colour Doppler ultrasound enabled precise prenatal visualisation of the fusion of the foetal head and chest up to the umbilicus. We could demonstrate the presence of two foetal hearts connected by an arterio-arterial shunt as well as two pairs of upper and lower extremities. After the clear 3-D presentation of the anomaly, making the poor prognosis visible, the mother decided to have the pregnancy terminated. Autopsy confirmed the prenatal diagnosis.
连体双胞胎的发生率为1:50000至1:100000，由受精13天以后胚胎盘不完全分裂所致。我们报告一例头部胸部联体双胎畸形（一种非常罕见的连体双胞胎形式），在妊娠13周时被诊断出来。三维和彩色多普勒超声能够精确地在产前观察到胎儿头部和胸部直至脐部的融合情况。我们能够证明存在两个通过动脉-动脉分流相连的胎儿心脏以及两对上肢和下肢。在清晰地进行三维异常呈现、使不良预后可见之后，母亲决定终止妊娠。尸检证实了产前诊断。
