Back to June 2010: Updates from the 2010 ASCO Annual Meeting
Would a test for circulating tumor cells predict future metastasis?
- Question from LauraT: Do you anticipate a test for circulating tumor cells in a non-metastatic setting? I had considerable residual disease (triple-negative breast cancer) after neoadjuvant chemo (tumor removed by surgery). Would a test for CTCs help in predicting metastasis or at least give us more information to determine if scans should be ordered?
- Answers —Beth DuPree , M.D., F.A.C.S.: Identifying circulating tumor cells (CTCs) in and of themselves at this point would have no therapeutic benefit as metastatic breast cancer is treated when it becomes identified and symptomatic. It is unknown whether CTCs would predict the recurrence of breast cancer, and generally scans looking for distant disease are not ordered routinely unless a patient has a specific set of symptoms that would warrant investigation. Although there may be trials looking at CTCs and what the presence of them may mean, currently we are not using this specific technology outside clinical trials.
- Andrew Seidman, M.D. : Unfortunately, many promising diagnostic tools are accepted as being proven to be useful ahead of the definitive data that either prove or disprove this. I currently am not convinced that measuring circulating tumor cells improves an outcome based on any and all available data.