But research is still in early stages, experts note
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In the usual cancer biopsy, a surgeon cuts out a piece of the patient’s tumor, but researchers in labs in the US are testing a potentially transformative innovation. They call it the liquid biopsy, and it is a blood test that has only recently become feasible with the latest exquisitely sensitive techniques. It is showing promise in finding tiny snippets of cancer DNA in a patient’s blood. It will enable oncologists to quickly figure out whether a treatment is working and, if it is, to continue monitoring in case the cancer develops resistance. Failing treatments could be abandoned quickly. Researchers caution that more evaluations of the test’s accuracy and reliability are needed. So far, there have been only small studies in particular cancers, including lung, colon and blood cancer. But early results are encouraging.
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