The answer, as any self-respecting cancer biologist might have informed him, was almost certain: very little. Cancer cells, after all, were deranged, uninhibited, and altered—responsive only to the most poisonous combinations of drugs. The signals and hormones that regulated normal cells had long been flung aside; what remained was a cell driven to divide with such pathological and autonomous fecundity that it had erased all memory of normalcy.