Zach and Amber’s baby was born with a rare condition which the doctors told them was called craniopagus parasiticus. This meant that their baby had two heads. Or–more properly–it meant that there had once been two babies, conjoined twins, but the second one had failed to develop completely. They were connected by the fused crowns of their skulls, and shared a small portion of the parietal lobes of their brains.
The second twin, which was called the “parasitic” twin, had a head and a neck but didn’t really have a body. The neck stump below the head contained fragments of bone and vestiges of a heart and lungs, and there were tiny buds attached to the neck that were the beginnings of limbs.