(April 23, 2015 at 5:44 pm)AFTT47 Wrote: I'd never heard of these until I read this article: http://www.msn.com/en-us/news/us/woman%E...ar-AAbzM0C
It's basically an undeveloped fetus (perhaps a twin) that ends up in the body of a person who developed to term. In this case, it was inside her brain. I wonder how someone who believes in souls reconciles it with this phenomena. God seriously works in mysterious ways.
A teratoma which seem to contain complete body parts like bones and teeth is called a fetiform teratoma. Whether fetiform teratoma is a failed fetus growing inside another is highly controversial. Normal Teratoma is usually not interpreted to be some parts of a separate failed fetus, but instead is a form of tumor of base cells in the host fetus. There is no clear delineation between normal teratoma and fetiform teratoma.
