Baby in a Baby?

This is an amazing story. I am happy to read that the baby is doing well but sad to know that the rigorous testing has to be done afterwards. I just feel bad when infants have to have blood tests and such. I agree with the "fetus in fetu" theory, even though the doctor said that it is very rare to occur in the brain. Imagine if the other fetus was able to grow outside of the brain. This could have probably been another "siamese twin" story in which they were connected at the head and only one could be saved or both lost.