conjoined twins

Japanese: conjoined twins(英語表記)conjoinedtwins
conjoined twins

...Also, because identical twins are produced from a single fertilized egg, the two children have exactly the same genetic material.
[fused body, fused twins]
Identical twins in which parts of the body are fused together are called conjoined twins, but because a pair of Chinese brothers (the Chan-Eng brothers) who were brought to America from Thailand (Siam) lived an exceptionally long life, they are commonly known as "Siamese twins." The fused parts can be in the head, chest, abdomen, or buttocks, but today many of these twins survive after undergoing surgery to separate the fused parts immediately after birth.

*Some terminology explanations that mention "conjoined twins" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…また,一卵性双生児では一つの受精卵からの分割のために,2児はまったく同じ遺伝質を有していることになる。
[癒合体,癒合双子]
 一卵性双生児で,体の一部分が癒合している症例を癒合体あるいは癒合双子conjoined twinsというが,タイ(シャム)からアメリカに連れられてきた中国系の兄弟(チャン=エン兄弟)が例外的に長命であったことから,俗に〈シャム双生児Siamese twins〉といわれている。癒合している部位は頭部,胸部,腹部,臀部とさまざまであるが,今日では出生直後に癒合を切り離す手術を行って生存できる例も多くなった。…

※「conjoined twins」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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