(Washington Post) – Scientists have discovered a new type of stem cell in the spine that appears crucial to resolving a long-standing mystery: why far more cancer cells spread to the spine than to other bones in the body. When breast, lung and prostate cancers metastasize to multiple bones in the body, three to five times more cancer winds up in the spine than in the lower and upper limbs. Scientists have known of this disparity for decades, but the reason for it has remained unclear. (Read More)