Why cancer spreads more in middle age than in old age

Melanoma may not become steadily more dangerous with age as scientists once assumed. In a surprising discovery, researchers found that cancer spread was lowest in young mice, surged in middle-aged mice, and then dropped again in very old mice. The key appears to be a special type of immune cell that helps keep cancer dormant and prevents it from spreading.

from Top Health News -- ScienceDaily https://ift.tt/DuZG2r3