QUOTE(Emperor @ Wed 2nd June 2010, 4:51pm)
They must not have bothered to read Lung Cancer
Lung cancer is a disease of uncontrolled cell growth in tissues of the lung. This growth may lead to metastasis, which is the invasion of adjacent tissue and infiltration beyond the lungs.
Second sentence is an error, contradicting Wikipedia's own definition of metastasis
Yep. Moreover, "cancer" is not simply "uncontrolled cell growth." That's the definition of "tumor," and some tumors are not cancerous (malignant). To be cancerous, a tumor must ALSO be invasive (at mnimum) and usually (though not always) capable of metastasizing also. It's not just "growth" that does this, as the first part of the second sentence wrongly suggests. Invasiveness and ability to metastasize are separate properties that are different from mere ability to grow and grow.
For example, people have occasionally been relieved of non-cancerous tumors weighing over a hundred pounds (growing in the abdomen, for example). After removal, they were fine. And as another example, there are a few rare cancers which invade but never seem to metastasize. Physicist Richard Feynman died from one of these. It kept invading until removing it fouled up his kidney function and he died. Had his doctors kept better track of him (perhaps he never went for checkups often enough) they could probably have prevented that.
Gak, WP screwed up that article.