Through a process called metastasis a malignant tumor's cells will eventually break off, travel throughout the body, and begin forming tumors in other regions.
Dorothy was shocked to see that the cow had broken her leg off, and that the pail was lying in several small pieces, while the poor milkmaid had a nick in her left elbow.
And even people with 'XX' Chromosomes that develop male genitals and characteristics, due to a piece of the 'Y' chromosome breaking off, and switching places to an 'X' chromosome.
Sunday's incident began with what was supposed to be a peaceful march to the border but an number of protestors broke off in different directions once they got close to it.
Now there's a new theory that the pancake shaped object was part of a dwarf planet like Pluto that somehow broke off from another solar system and traveled near ours.