Dicephalic parapagus is a rare form of partial twinning with two heads side by side on one torso. Infants conjoined this way are sometimes called "two-headed babies" in popular media. The … See more

Dicephalus means two-headed. Parapagus means joined side by side.
Dicephalic twins are called:
• dibrachius, if … See more

Conjoined twins appear in one in 50,000 to one in 100,000 births. Dicephalic twins represent about 11 percent of all conjoined twins. See more

As late as the 1960s, some medical publications argued that newborn dicephalic twins should not be actively treated or resuscitated. An attempt at surgical separation was reported in a paper published in 1982, but did not result in long-term … See more

Giacomo and Giovanni Battista Tocci (1877–1940), were Italian male dicephalus parapagus twins who survived to adulthood. Each had his own pair of arms. They had two legs all together, one of which was controlled by each twin. They were exhibited in See more

• Craniopagus parasiticus is another form of partial twinning which results in two heads kept alive by a single torso. In these cases a second, vestigial torso is present, and the heads are joined directly to one another.
• Diprosopus is a condition in … See more