These cells, technically speaking, are immortal. The woman from whose body they were once taken has been dead for thirty ears. ~The Emperor of Maladies
The section ends there. It is a tantalizing ending. The idea of cancer cells sitting a petri dish decades after their host has died, dividing endlessly and furiously is terrifying. The question is how? And why? We view cancer, and all disease, as a mechanism designed to harm and even kill. Why does it continue living and living when its purpose has long been carried out? We view cancer as a death sentence, but cancer cells themselves cling to life. They demand it, and they hold on to it, often more tightly than the humans they afflict.