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
Cancer is essentially a random mutation. Your cells go through a constant cycle of replication. At any one moment due to essentially random chance, the result of this replication is a cancerous cell instead of a regular cell. These then continue to replicate and live parasitically off of you, hindering the proper function of whatever part or organ they’re growing onto until they ultimately kill you. It’s even possible that you unknowingly have had cancerous cells form inside you that your immune system managed to kill quickly enough before they spread. Cancer factors are simply things that make the appearance of such cells more likely but basically anyone is liable to getting cancer at any point for no particular reason other than random chance. Once cancer forms it’s very difficult to completely get rid of.
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