Cancers that have spread throughout the body, a process known as metastasis, are difficult, often impossible, to control. They are the leading cause of cancer-related deaths.
Twenty years ago, however, two University of Chicago cancer specialists--Samuel Hellman, former dean of the University of Chicago's Division of the Biological Sciences, and Ralph Weichselbaum, chairman of radiation oncology--described what they considered an intermediate and potentially treatable state between a single tumor and widespread cancer. They labelled it oligometastasis.