And this works for metastatic lymph nodes also.

But when sentinel lymph node came into our treatment protocol, the surgeon basically looks for the single node that is the first draining lymph node of the cancer.

Who amongst us hasn't had swollen lymph nodes with a cold?

But fortunately it was removed before it had spread to her lymph nodes.

Some of these are swollen lymph nodes that look a little larger than others.

Sentinel lymph node dissection has really changed the way that we manage breast cancer, melanoma.

Women used to get really debilitating surgeries to excise all of the axillary lymph nodes.

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And then if that node has cancer, the woman would go on to get the axillary lymph node dissection.

The patient has cancer, you want to know if the lymph nodes have cancer even before you go in.

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A windpipe cell already knows it's a windpipe cell.

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This is a normal cell. This is a cancer cell.

They're taking you over cell for cell... atom for atom.

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So what that means is if the lymph node did not have cancer, the woman would be saved from having unnecessary surgery.

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