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Pygopagus

   Also found in: Medical 0.01 sec.
Pygopagus 

a developmental defect in which conjoined twins are united in the sacral region. The individuals forming a pygopagus are believed to be either females or hermaphrodites. The Czech pygopagus Rosa and Josefa Blažek lived 42 years (1878–1920) in good health. Modern medicine corrects this defect surgically.
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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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