Tumor section (IMAGE) Max Delbrück Center for Molecular Medicine in the Helmholtz Association Caption A tumor section, with a mass spectrometer visible in the background. Credit © Corinna Friedrich, MDC / Charité Usage Restrictions Please only use when reporting about the paper. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.