A study published in the June Lancet Oncology reports early stage breast cancer patients who produce circulating tumor cells (CTC) may be at greater risk for breast cancer recurrence. Until now, lymph node biopsy has been the best predictor of prognosis. More research is needed to learn how to apply this new discovery, but the study is a step forward in understanding what is happening biologically. Anthony Lucci, M.D., professor, and Isabelle Bedrosian, M.D., associate professor, both in...