Plattner V, Heloury Y, Cohen J Y, Nomballais M F, Rogez J M, Leborgne J, Robert R
Laboratoire d'Anatomie, Nantes, France.
Surg Radiol Anat. 1993;15(1):35-9. doi: 10.1007/BF01629859.
Among conjoined twins (1 out 50000 births), thoracopagus occurs most frequently and is generally lethal. Our anatomical study of five sets of sternopagus twins (3 female, 2 male) was performed to determine the ability of prenatal sonography to detect these anomalies. Autopsy in four cases revealed identical malformations: common sternum, single malformed heart, joined hepatic parenchyma, and a common small bowel leading to a cystic dilatation situated on the ileal segment at the end of the superior mesenteric artery. The diagnosis of conjoined twins was made in all cases by prenatal sonography at the mean time of 24.6 gestation weeks (range 19-34). The malformations detected by prenatal sonography were a single cardiac mass (all cases), joined hepatic parenchymas (3 cases), and an ileal cystic dilatation (1 case). Pregnancy was terminated in four cases. In one case cesarean delivery was performed, and the infants died 48 hours later. Prenatal sonography currently seems to be the best examination for diagnosis of sternopagus twins and the detection of lethal malformations thus allowing interruption of pregnancy.
在联体双胎（每50000例出生中有1例）中，胸部联体最为常见，且通常是致命的。我们对五组胸骨联体双胎（3例女性，2例男性）进行了解剖学研究，以确定产前超声检查检测这些异常的能力。4例尸检显示出相同的畸形：共同胸骨、单一畸形心脏、相连的肝实质以及导致肠系膜上动脉末端回肠段出现囊性扩张的共同小肠。所有病例均在妊娠平均24.6周（范围19 - 34周）时通过产前超声检查确诊为联体双胎。产前超声检查发现的畸形包括单一心脏团块（所有病例）、相连的肝实质（3例）以及回肠囊性扩张（1例）。4例终止妊娠。1例行剖宫产，婴儿在48小时后死亡。目前，产前超声检查似乎是诊断胸骨联体双胎及检测致命畸形从而允许终止妊娠的最佳检查方法。
