Like a horror-movie villain locked into a three-picture contract, your twin never really died. Instead, she'll end up hiding in plain sight--within your very cells--rendering you a chimera, a single human who carries the genetic makeup of two different people. Most of the time, there aren't any outward signs that your body is harboring a stowaway. But when you do notice, things get a little crazy.

Originally posted by boondock-saint

Man Survives Huge ‘Alien’ Tumor

When Josh Abken told his doctor he was having persistent back pain about a year ago, the doctor took an x-ray. The Chico-area school vice principal said he was stunned to learn what was growing inside him.

“You think you got a serious muscle pull or something, [but] the doctor has that serious doctor face you see on TV,” Abken said. “They didn’t really know what was growing inside of me.”

They named it Gill: A soccer-ball size “alien” tumor that had become as solid as a rock and even had growing tentacles.

Alien Tumor

CNN Video

OK, I just got flashbacks to the hollywood movie
ALIENS, where the body acted as a host for the alien
to grow til it busted out on it's own.

This being a conspiracy web site, I'm sure the
conjecture on this will abound.

These are actually common tumours. A very high percent of women (if not all women) have these tumours, they are called fibroids and often they are calcified and massive, they dont remove them if its a women as so many have them, even if its causing problems. Because its a man, the media make a big deal about it.