Researchers develop new blood test to screen for early-stage cancer

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Scientists have made progress on developing an experimental blood test that could detect many types of cancer in their early stages, and possibly even their locations in the body.
The noninvasive blood test was shown to detect the presence of common tumors of the ovary, liver, stomach, pancreas, esophagus, colorectum, lung and breast, according to a study published in the journal Science on Thursday.
This blood test, called CancerSEEK, could cost less than $500, w