by Max Delbrück Center for Molecular Medicine Immunofluorescence image of the post-partum mouse mammary gland showing membrane bound B-catenin (white) and nuclei (blue). Credit: Birchmeier Lab, MDC Breast cancer is the most common type of tumor found in women. Each year in Germany alone, 69,000 new cases are diagnosed. Around 80 percent of tumors originate in...