Upper Trunk & Head (Front/Back): Cephalopagus
Head: Craniopagus
Brain, Head & Chest: Epholothoracopagus
Trunk (Front/Back): Omphalopagus
Rear End: Pygopagus
Chest (Side to Side): Thoracopagus
Lower Body (Side to Side): Parapagus
Lower Body (Front/Back): Ischiopagus
When the twins share an extensive connection over several areas, then the duplicated part is named. For example, dicephalus describes twins with two heads and one body.
Conjoined twins, also known as Siamese twins, are a rare type of monozygotic (identical) twins. Find more answers to Frequently Asked Questions About Conjoined Twins.

