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Researchers have discovered that melanoma metastasis does not increase linearly with age as previously thought. In mouse studies, cancer spread was lowest in young mice, peaked in middle-aged mice, and decreased again in elderly mice. This pattern appears to be controlled by specific immune cells that can suppress cancer dormancy and prevent metastasis.
Why it matters
This finding challenges conventional assumptions about age-related cancer risk and could lead to age-specific cancer treatment strategies. Understanding the role of these immune cells in different life stages may help develop therapies that enhance natural cancer suppression mechanisms, particularly in middle-aged patients who appear most vulnerable to metastasis.
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.
Source: Why cancer spreads more in middle age than in old age