Monday, September 26, 2011

Siamese Twins


Conjoined / united twins (twins attached) is often referred to as a Siamese twin (conjoined twins) are taken from the name attached twins Chang and Eng Bunker of Siam (Thailand). If the formation of twins began after disc rudimentary embryo and amniotic sac has been formed and if the embryo is not perfect separation discs, will be formed conjoined twins.
If the body only have partial duplication, attached it is usually located laterally. Incomplete separation discs embryo can begin in one or both poles and gives 2 heads, 2, 3, or 4 arms, 2, 3, or 4 limbs, or a combination thereof.
Separation of conjoined twins are almost completely by surgery may be successful when organs essential to life is not shared. For example, Chang and Eng Bunker reported to be connected only by a small bridge network that contains the structure of the abdominal wall and maybe some heart. Most likely the process of formation of twins is due to teratogenic events that disrupt normal developmental processes.

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