They really are different. Cells can grow out of control (this is what causes cancer) due to many possible defects, which could cause their growth to be different. And they’re different types of cells in the first place which has a very big effect too.
Cancers spread and need to be treated differently and this isn’t just because of where they’re located. We will never have “a cure for cancer” because of this— it’s not one disease likely to have one cure. At the same time, we have good or excellent treatments for certain types of cancer, so there are “cures” out there and more being developed all the time.
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