Craniopagus Parasiticus

Craniopagus parasiticus is a medical condition in which a parasitic twin head with an undeveloped (or underdeveloped) body is attached to the head of a developed twin.

There have only been eight documented cases of this phenomenon. On December 10, 2003, Rebeca Martínez was born in the Dominican Republic with this rare condition. She was the first baby born with the condition to undergo an operation to remove the second head. She died on February 7, 2004, after an 11-hour operation. On February 19, 2005, Manar Maged underwent a successful 13-hour surgery in Egypt, but died March 25, 2006 [1].

An earlier case was the so-called "Two-Headed Boy of Bengal," who was born in 1783 and died of a cobra bite in 1787. His skull remains in the collection of the Hunterian Museum of the Royal College of Surgeons of London.[2].