Richard Pestell, Kimmel Cancer Center (IMAGE) Thomas Jefferson University Caption Researchers at Kimmel Cancer Center at Jefferson show that cyclin D1 overexpression associates with chromosomal instability in luminal B breast cancer. Credit TJUH 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.