Few individuals survive until birth. For those who do, the only treatment available is to surgically remove the parasitic twin. Of the two documented attempts, however, one child died within hours and neither reached their second birthday. The problem with surgical intervention is that the arterial supplies of the head are so intertwined that it is very hard to control the bleeding, but it has been suggested that cutting off the parasitic twin's arterial supply might improve the odds of the developed twin's survival.
Craniopagus parasiticus
Gnathostoma spinigerum
Ancylostoma tubaeforme
Gongylonema pulchrum
Echinostoma revolutum
Dracunculus medinensis
Fannyhessea vaginae
Brachyspira pilosicoli