For some cancers you can see very clearly – like on the skin or the mouth.
For others you can feel them – like breast cancer.
But if you don’t know where it is you can try a few things. Different cancers put different chemicals in the blood, so you can have a blood test and this will tell you about the type of cancer, then you know where to start looking.
Then you can use a machine called an MRI machine to scan through the whole body and a Dr will look at the results and be able to see where the cancer is. The machine lets you look into the body without having to cut you open…
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