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pygopagus

   Also found in: Encyclopedia 0.01 sec.
pygopagus
[pīgop′əgəs]
Etymology: Gk, pyge + pegos, fixed
conjoined twins consisting of two fully formed or nearly formed fetuses united in the sacral region so that they are positioned back to back.
pygopagus [pi-gop´ah-gus]
conjoined twins fused in the sacral region.
pygopagus
conjoined twins fused in the sacral region.
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The more common types of conjoined twins include the thoracopagus type where the fusion is anterior, at the chest, and involves the heart (35%); the omphalopagus type where the fusion is at the mid-trunk (30%); the pygopagus type where there is a posterior union involving the rump (19%); the parapagus type, with a lateral fusion of the lower half of the body extending upwards (5%); and combination types.
Conjoined twins with a horseshoe kidney by Modi, M.; Kramer, L. / South African Journal of Radiology
 
 
 
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