Colorized image of nanoneedles. Credit: Chippani/King's College London A patch containing tens of millions of microscopic nanoneedles could soon replace traditional biopsies, scientists have found. The patch offers a painless and less invasive alternative for millions of patients worldwide who undergo biopsies each year to detect and monitor diseases like cancer and Alzheimer's. The research is published in Nature Nanotechnology. Biopsies are among the mos