Parasitic Twins
 

that sounded like it was narrated by the 'faces of death' guy

One of my friends' unborn twin brother lived in his body and became a tumor around the time he was in kindergarten. When they removed it, it was like a small, dead fetus with hair and nails :/

Yes, fetus in fetu - as it is called - is not all that uncommon. I nearly added it to the teaser though the only images I have in my collection are quite graphic. However, it can go undetected for decades.

Imagine a creature living inside of you, leeching and slowly growing. You would never know until a lumb appeared, usually in the abdominal area.

By the way, that is my voiceover.

i can't watch/listen 'cause i'm at work, and my computer at home is f@cked. but this concept has intrigued me since i read stephen king's _The Dark Half_.