An old woman coughs up what she believes to be a tumor. While asleep, the thing crawls inside of her son and reproduces inside him, then causes him to go on a killing spree to feed it.
A middle-aged woman is diagnosed with a tumor by a charismatic preacher. She vomits up what she believes to be the tumor. The "tumor" turns out to be a strange spore of sorts that can grow into a carnivorous creature. This spore inside the boy's body now makes him brutally kill people to feed the other spores, which grow into strange creatures as described.—liverboyjoe179@cs.com