Hi,
This is a good question! All organs can get cancer in them, there are over 200 different types of cancer. But there are cancers that occur in tissues rather than organs, such as leukemia which is a cancer of the blood.
Cancers can occur in pretty much any cell within your body. They will all have an effect on the organs, even if it is in a tissue like the blood. This is bacause the body is a very controlled environment and changes in any part of it will effect the other parts. Sort of like dominos.
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