Diprosopus, also known as craniofacial duplication, is an extremely rare congenital disorder whereby parts or all of the face are duplicated on the head.
A chick with two beaks and three eyes
Spanish case of diprosopus, born 1775
An example of a "Janus cat"
Polycephaly is the condition of having more than one head. The term is derived from the Greek stems poly meaning "many" and kephalē meaning "head". A polycephalic organism may be thought of as one bei
Diprosopus
…Kara Mia, a Philippine TV series that tells the story of a young woman with two faces divided in one body. Polycephaly Leroi, Armand Marie (2005). Mutants: On Genetic Variety and the Human Body. New York, NY: Penguin Books. ISBN 9780142004821. Archived from the original…
The Tocci Brothers, c. 1881
A (female) case of Dicephalus parapagus.
Drawing of the eighteenth century Boy of Bengal, affected by craniopagus parasiticus.
Skeletal structure in a case of dicephalus parapagus dipus. From: Hirst & Piersol, 1893.