Biochips Can Detect Cancers Before Symptoms Develop

n their fight against cancer, doctors have just gained an impressive new weapon to add to their arsenal. Researchers have developed a chip that can save lives by diagnosing certain cancers even before patients become symptomatic. The new technology, known as a biochip, consists of a one-centimeter by one centimeter array that comprises anywhere between several dozen and several hundred "dots," or small drops. Each of these drops contains a unique protein, antibody or nucleic acid that will attach to a particular DNA sequence or antigen.

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