Herring S W, Rowlatt U F
Teratology. 1981 Apr;23(2):159-73. doi: 10.1002/tera.1420230202.
Anatomical features are described in a case of cephalothoracopagus female twins with laterally fused heads. There was a single foregut, shared equally by the two individuals. The tracheae, lungs, hearts, livers, and gallbladders were also shared by the two individuals. They were located in the anterior and posterior regions of the joined bodies. These peculiarities occur in other cases of cephalothoracopagus twinning reported in the literature, and may have been caused by spatial problems in the developing twin embryos. In particular, each heart is considered to be a composite organ, formed by tissue from both individuals. The occipital region of the skull was double, but the remainder of the cranium was single. The oral cavity was divided in two by a midline mandibular body thought to represent the fused medial portions of two mandibles. Each compartment so formed contained a tongue. This midline body is considered responsible for a cleft lip and palate. Finally, we propose that anencephaly in this and other cases of laterally fused heads is associated with mechanical difficulty in closing the rostral neuropore.
本文描述了一例头部侧向融合的胸腹联体女双胞胎的解剖特征。存在一个单一的前肠，由两人平均共享。气管、肺、心脏、肝脏和胆囊也由两人共享。它们位于联体身体的前部和后部区域。这些特征在文献中报道的其他胸腹联体双胎病例中也有出现，可能是由发育中的双胎胚胎的空间问题引起的。特别是，每个心脏被认为是一个复合器官，由两人的组织形成。颅骨的枕部是双重的，但颅骨的其余部分是单一的。口腔被一个中线下颌体分为两部分，该下颌体被认为代表两个下颌骨融合的内侧部分。这样形成的每个腔室都包含一条舌头。这个中线体被认为是唇腭裂的原因。最后，我们提出，这种和其他头部侧向融合病例中的无脑畸形与关闭头端神经孔的机械困难有关。
