Oncotype DX

The Oncotype DX test is a diagnostic test used on breast cancer patients that analyzes the tissue and determines their risk of recurrence. It is a 21-gene assay that currently tests for invasive breast cancer. However, it is now being explored that the test may be useful in patients that have ductal carcinoma in situ (DCIS). If a patient has a low risk for recurrence then they may be able to skip radiation or chemotherapy and not have to endure these harmful treatments. A limitation with the Oncotype DX is that it does not tell us the benefits of radiation, even if the test reveals a high risk for recurrence.

article:

http://www.medscape.com/viewarticle/754967