Earlier on, the procedures done on brain tumors have been invasive but it seems doctor’s have come up with more easier method as CNET writes.

Researchers at Washington University in St. Louis have developed a way to detect biomarkers of brain tumors with a simple sample of blood, according to a study published in Nature and report by science news site EurekAlert.

Blood-based biopsies have been developed for other cancers, but not in the brain because of what’s known as the blood-brain barrier — a membrane that separates the blood circulating in the brain from fluid in the central nervous system.

The researchers’s new technique uses focused ultrasound and microbubbles to allow biomarkers from a tumor to pass through the blood-brain barrier and into a patient’s blood, possibly eliminating the need for an invasive biopsy.

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