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Biopsy's have their own risks.

The article mentions that their method relies on blood sampling rather than biopsy, however I concede to the verity of your comment.

Such as?

Sometimes piercing a tumor can spread cancer cells

Happened to my wife’s uncle. A meningioma surgery led to glioblastoma.

Please tell me he’s OK

Glioblastoma usually means your life expectancy is a few months from diagnosis. We’re saying our goodbyes next month.

So so sorry