Studying about cell division always brings up great questions about cancer.
One very recent discovery is the develop of blood vessels in tumors which serves as a pipeline for nourishment. It appears that tumors have hormone receptors that allows a hormone called FSH (follicle stimulating hormone) to bind and start forming new blood vessels. This receptor was found in 11 different types of tumors and the race is on to see if compounds can be used to block the receptor or inhibit the protein.
Source: A. Radu et al. Expression of follicle-stimulating hormone receptor in tumor blood vessels. New England Journal of Medicine, Vol 363, Oct 21, 2010, p.1621.
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