Find Your Finish to Anti-Estrogen Therapy

The Breast Cancer Index® (BCI™) Test provides valuable information to help determine the optimal length of treatment.

Breast cancer is complicated enough. Your doctor will receive your BCI Test results in one clear and easy-to-understand report. The BCI Test provides two pieces of important information, which, along with other clinical information, help you and your doctor decide about the appropriate length of anti-estrogen treatment for you. 

“Yes” Result Example

Click on the petals to learn more about each section of the report. Buttons below the report allow you to switch between "Yes" and "No" results.

Report Yes

Results That Make A Difference

Regardless of your Breast Cancer Index Test results, knowing whether longer treatment is likely to benefit you can help you and your doctor weigh the risks and benefits of longer treatment, so you can make decisions you feel good about.

Watch Patient Stories
45%

of patients changed their preference regarding extended anti-estrogen therapy following Breast Cancer Index Testing.8

Use this conversation guide to ask your doctor if the BCI Test is right for you.

1. Referenced with permission from the NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines®) for Breast Cancer V.5.2025. © National Comprehensive Cancer Network, Inc. 2025. All rights reserved. Accessed October 28, 2025. To view the most recent and complete version of the guideline, go online to NCCN.org. NCCN makes no warranties of any kind whatsoever regarding their content, use or application and disclaims any responsibility for their application or use in any way. 2. Andre F, et al. J Clin Oncol. 2022;40(16):1816-1837. Referenced with permission from the American Society of Clinical Oncology (ASCO®) Clinical Practice Guideline Biomarkers for Adjuvant Endocrine and Chemotherapy in Early-Stage Breast Cancer. © American Society of Clinical Oncology. 2025. All rights reserved. To view the most recent and complete version of the guideline, go online to https://ascopubs.org/jco/special/guidelines [ascopubs.org]. ASCO makes no warranties of any kind whatsoever regarding their content, use of application and disclaims any responsibility for their application or use in any way. 3. Zhang Y, et al. Clin Cancer Res. 2013;19(15):4196-4205. 4. Sgroi DC, et al. J Natl Cancer Inst. 2013;105(14):1036-1042. 5. Bartlett JMS, et al. Clin Cancer Res. 2022;28(9):1871-1880. 6. Noordhoek I, et al. Clin Cancer Res. 2021;27(17):311-319. 7. Mamounas EP, et al. Clin Cancer Res. 2024;30(9):1984-1991. 8. Sanft TB, et al. J Natl Compr Canc Netw. 2024;22(2):99-107.