7e26d8ac_Eng_and_Chang_Bunker__Scientific_Term
[Description] About 6% of all conjoined twins have this condition, with the twins joined by the coccyx (lowest part of the backbone) and the sacrum (backbone immediately above the coccyx). [Scientific Term] 
Ischiopagus
C r a n i o p a g u s
T h o r a o p a g u s
P y g o p a g u s
I s c h i o p a g u s
O m p h a l o p a g u s
D i c e p h a l u s
Eng and Chang Bunker
Scientific Term