Blood tests called liquid biopsies show signs of finding cancers at an early stage

A blood test for 10 different types of cancers could one day help doctors screen for the disease before patients show symptoms, researchers at the world’s largest gathering of oncologists have said.

The test, called a liquid biopsy, screens for cancer by detecting tiny bits of DNA released by cancer cells into blood. The test had particularly good results for ovarian and pancreatic cancers, though the number of cancers detected was small.

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