Stem-like Tumor Cell (IMAGE) University of California - San Diego Caption A rare-stem like tumor cell, which plays a critical role in the spread of breast cancer, is identified with immunostaining for the β3 integrin subunit (blue) and transcription factor Slug (brown). Credit UC San Diego Health Usage Restrictions None 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.