Related conditions In addition to<unk> , a few other conditions involve a child's, or animal's, birth with two heads or faces. Dicephalic parapagus Dicephalic parapagus is a condition where two heads are side by side on a single torso, with varying degrees of twinning of organs and structures within the torso. Diprosopus Diprosopus occurs when a single body and neck are present, but there is a duplication of the structures of the face. This is different from<unk>  in that there is only one head, although there is a duplication of the craniofacial features. Diprosopus can range from having two fully formed faces to just a duplication of the nose or eyes. Cats with the condition are referred to as 'Janus cats'. A cat named Frankenlouie was a famous example noted by the Guinness Book of World Records in 2012 for being the longest surviving Janus cat.
Craniopagus parasiticus
Gnathostoma spinigerum
Ancylostoma tubaeforme
Gongylonema pulchrum
Echinostoma revolutum
Dracunculus medinensis
Fannyhessea vaginae
Brachyspira pilosicoli