In its first laboratory tests on human tissue, a light-based probe built by researchers at Duke University's Pratt School of Engineering, Durham, N.C.

• Position: HEALTH BEAT - Brief article

In its first laboratory tests on human tissue, a light-based probe built by researchers at Duke University's Pratt School of Engineering, Durham, N.C., almost instantly detected the earliest signs of cancer in cells that line internal organs. The vast majority of cancers start in the body's epithelial cells, which line the mucous membranes in the lungs, esophagus...