The Times reports that researchers have identified cancer stem cells for prostate cancer: "Identifying the cancer stem cell is the most important element: stem cells feed the whole repertoire of cancer cells that complete the tumour. ... the equivalent of finding the 'engine room' that drives cancer to grow, spread and resist treatment such as chemotherapy and radiotherapy. Finding such stem cells is like looking for a very small needle in a rapidly growing haystack. This study has identified the first 'hints' that such novel stem cells do exist in prostate cancer." If you can eliminate the errant stem cells at the root of a cancer, you eliminate the cancer - the convergence of stem cell research, immune therapy and other very precise cancer treatments means that scientist should soon be able to do just this.