Engineers find cancer cells have remarkable ability to penetrate deep into their environment

In the 1835 Hans Christian Andersen fairy tale “The Princess and the Pea,” a princess is deemed authentic because of her sensitivity to a pea placed under 20 mattresses on her bed. New research from the McKelvey School of Engineering at Washington University in St. Louis has found that like the fabled princess, cancer cells can sense a layer of cells beneath the top collagen layer on which they normally travel, while normal cells cannot.