Dr. Shyamala Gopalan was a breast cancer scientist whose research advanced understanding of hormone-responsive breast cancer. Working in the United States and Canada, she investigated the roles of progesterone receptors and related molecular pathways in tumor development, helping explain how certain breast cancers grow and respond to hormones. Her laboratory research contributed to improved diagnostic methods and informed advances in breast cancer treatment. Through a career spanning several decades, she helped strengthen North American biomedical research and left a lasting legacy in cancer science.