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Somewhat yes tumors have something dubbed "tumor escape mechanisms" these mechanisms allow it survive our immune system as well as treatments like radio therapy, chemotherapy and surgery.

Tumor traits are likely to undergo similar natural selection processes like every other bilogical constructs.

But it isn't "new" in the sense that tumors are starting to do it recently. It's "new" in the sense that we are only now discovering it. That's why it is a bad title, a bit click-baity.