For example, if someone discovers they have breast cancer or cancer in the liver or something, does that mean that they always had cancer but it was not able to be detected until they discovered they had it? Or is that something that is formed later, and wasn’t always in that person’s body?
In: Biology
the cells in your body follow rules so they play nice together. sometimes cells have a mutation that makes them stop following rules and be selfish. this happens to an existing cell by dna damage or a new cell during division, it’s not something you were born with. usually your immune system notices and kills it and you are fine, but sometimes the mutation also helps it hide from the immune system. this is when cancer gets dangerous and grows into a tumor.
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