Eli5 why cancerous Tumors cant just be removed

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Gandma had colon cancer. They just cut ist out.
Grandpa has liver cancer. Has to go through chemo.
Why cant they just cut out the liver cancer. The liver can heal Right?

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8 Answers

Anonymous 0 Comments

Big tumors can be identified using imaging techniques (MRI, CT etc.) and can be removed if accessible. But single cancerous cells cannot be seen on a scan and will continue dividing and a new larger tumor will form. Often these single cells or small groups of cells will have spread from the primary tumor. Cancer sucks

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