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LiveScience
LiveScience
Kamal Nahas

New blood test detects cancers 3 years before typical diagnosis, study hints

A photo of a gloved hand holding up a tube of blood in a laboratory.

Blood plasma can harbor DNA changes that could flag cancer years before existing diagnostic tests, an early study hints.

The recent study, published May 22 in the journal Cancer Discovery, found traces of free-floating DNA from dead precancerous or cancerous cells in plasma that had been donated three years before a diagnosis.

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