Cancer Blood Tests

"...The team made the discovery partly by accident. They were studying short pieces of RNA called micro RNAs in human tissue samples. These tiny pieces of RNA, discovered only a few years ago, play a big role in regulating genes, and are now known to be altered in cancer..... In a large majority of the cases, just by measuring the amount of micro RNA in the blood, we could tell who had cancer and who didn’t,” Tewari says."