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Biotheranostics, Inc. Announces Several Data Disclosures at the 40th annual San Antonio Breast Cancer Symposium
Findings from correlative studies elucidate association between Breast Cancer IndexSM (BCI) with traditional clinicopathologic and molecular factors
By PR Newswire

SAN DIEGO, Dec. 8, 2017 /PRNewswire/ -- Biotheranostics releases the results from 6 multi-institutional collaborative studies at the San Antonio Breast Cancer Symposium this week. These studies, led by breast oncology thought leaders, analyze data from the proprietary Breast Cancer Index (BCI) Clinical Correlative Database which represents a detailed aggregation of molecular biomarker and clinicopathologic data for women with early stage estrogen-receptor positive (ER+) breast cancer diagnoses in whom BCI has been utilized to inform the decision to extend or end endocrine therapy after five years of treatment. The database is an IRB-approved, deidentified data repository containing more than 50 data points per patient, including their BCI test results.

The extension of endocrine therapy for women with early stage, ER+ breast cancer has been, and continues to be, one of the most studied questions in oncology. Breast Cancer Index is uniquely qualified and validated to inform this shared decision between patient and physician through its prognostic and predictive test results. The database of nearly 20,000 patients provides an approach to gain powerful insights into the integration of BCI into routine clinical care and addresses important questions regarding the relationships between molecular-based prediction of risk of recurrence, benefit from extended endocrine therapy (EET), and traditional clinical and pathologic factors.

As clinical adoption of Breast Cancer Index continues to grow, the requests from luminaries to help clarify the correlation of independent clinicopathological factors and other molecular tests with the Breast Cancer Index test results have also increased. "What we have routinely found is that although there is moderate correlation between BCI and clinicopathologic factors, BCI identifies a significant subset of patients who, considered low risk based on traditional parameters, are in fact at high genomic risk of late recurrence and high likelihood of benefit from EET. Additionally, there is significant discordance between BCI and other genomic tests for this same measure. Furthermore, neither clinical pathological factors nor other molecular tests predict benefit from extended endocrine therapy," said Dr. Catherine Schnabel, Chief Scientific Officer, Biotheranostics.

Analyses focusing on known prognostic factors to assess risk and inform the extended endocrine decision including lymphovascular invasion status, nodal status, quantitative hormone receptor expression, proliferation status, age, tumor grade and tumor size, and previous genomic test results will be presented at the Symposium during the week beginning Wednesday through Saturday.

These results provide additional insight into tumor, patient and molecular features and their relation to BCI, and enable characterization of this important tool that provides additional information beyond clinicopathology to help physicians to better personalize EET recommendations -- informing patient selection for extended therapy, while potentially minimizing exposure to unnecessary side effects and toxicities for the patients who are at low risk of late distant recurrence and low likelihood of benefit from EET.

About Breast Cancer IndexSM
BCI is a molecular, gene expression-based test uniquely positioned to help identify patients with early-stage, ER+ breast cancer who may be suitable candidates for extended endocrine treatment. It is the only validated, commercially available test that predicts risk of late distant recurrence, as well as the likelihood of benefit from extended endocrine therapy. The breakthrough test helps oncologists and patients navigate the difficult trade-off between taking†steps to prevent recurrence of their disease and facing significant side effects and safety challenges related to extended endocrine therapy. For more information, visit

About Biotheranostics
Biotheranostics, Inc. operates a CLIA-certified and CAP-accredited diagnostic laboratory in San Diego, California. †Biotheranostics, Inc., is a leading healthcare provider in the oncology field assisting physicians in the treatment of cancer patients. Its suite of proprietary molecular diagnostic tests provides important information to physicians to tailor treatment to individual patients. The company's Breast Cancer IndexSM and CancerTYPE IDģ tests address a variety of unmet medical needs in the management of cancer patients, and the accuracy, clinical validity, clinical utility, and cost-effectiveness of the tests have been confirmed across extensive clinical studies. Learn more at

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SOURCE Biotheranostics, Inc.

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