As with any cancer, the only way you know you have it is when it forms a tumor that is seen on a CT scan. In the meantime, most of the cancer cells are microscopic and you can’t see them. But your immune system can spot them and eliminate them So try not to worry as it lowers your immune system.
You’re asking how does the pathologist determine no lymphovascular or angioinvasion? I don’t know, there must be something they look at under the microscope when they are doing the pathology that allows them to determine if lymphovascular invasion or angioinvasion is present or absent.
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