Parasite

In the future, cities are ravaged by atomic fallout and controlled by evil corporations that have developed a mutant pair of flesh-eating parasites. One is feeding inside the man who created it. The other has escaped. Now with the help of a young woman left orphaned in the wasteland (Demi Moore), a scientist (Robert Glaudini) on the run must destroy these horrific creatures before they can reproduce. But the more a parasite feeds, the bigger it becomes. And the more it grows, the hungrier and angrier it gets.