Putz B, Rehder H
Am J Med Genet. 1985 Aug;21(4):631-5. doi: 10.1002/ajmg.1320210403.
This is a report of monoamniotic-monochorionic (ie, probably MZ) twins, one of which had anencephaly, whereas the co-twin died of complications of prematurity. Autopsy in this seemingly nonmalformed twin showed a small encephalocele. The literature on MZ twins with discordant anencephaly is often contradictory. It is suggested that this might be due to the difficulty of determining zygosity on the one hand and identifying discordance or concordance on the other. This case is presented as an example of this difficulty; it is discordant with respect to anencephaly, but concordant in the sense of "dysraphic" disturbances.
这是一篇关于单羊膜囊单绒毛膜（即可能为同卵）双胞胎的报告，其中一个胎儿患有无脑畸形，而另一个双胞胎死于早产并发症。对这个看似无畸形的双胞胎进行尸检发现了一个小的脑膨出。关于患有无脑畸形不一致的同卵双胞胎的文献往往相互矛盾。有人认为，这一方面可能是由于确定合子性存在困难，另一方面是由于难以确定不一致或一致情况。本文展示此病例以说明这种困难；该病例在无脑畸形方面不一致，但在“神经管闭合不全”紊乱方面是一致的。
