Finding cancer before there have been any symptoms is the promise of a chip from IBM.
IBM have an IC which can detect and isolate particles at the nanoscale, Exosome particles, which point up the development of cancer and other diseases, can be isolated and analysed. The technology can detect particles down to 20nm. The 2cm square IC has an asymmetric pillar array which sorts a liquid passing through them into isolated particles.
Although the technology can be used to detect the presence of several diseases before any physical symptoms have appeared, it is initially being directed at prostate cancer.