Publications by authors named "B L Nisenbaum"

Background: The combination of a taxane with trastuzumab and pertuzumab is standard of care for first-line treatment of human epidermal growth factor receptor 2 (HER2)-positive metastatic breast cancer. The combination of vinorelbine with trastuzumab and pertuzumab showed anti-tumor activity in a phase 2 trial.

Patients And Methods: The databases of two tertiary medical centers were retrospectively searched for patients with HER2-positive metastatic breast cancer who underwent first-line treatment in 2013-2019 with a taxane or vinorelbine in combination with trastuzumab and pertuzumab.

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The 21-gene Recurrence Score (RS) assay is a validated prognosticator/predictor of chemotherapy (CT) benefit in early-stage estrogen receptor (ER)-positive breast cancer (BC). Long-term data from real-life clinical practice where treatment was guided by the RS result are lacking. We performed exploratory analysis of the Clalit Health Services (CHS) registry, which included all CHS patients with node-negative ER+ HER2-negative BC who underwent RS testing between 1/2006 and 12/2009 to determine 10-year Kaplan-Meier estimates for distant recurrence/BC-specific mortality (BCSM) in this cohort.

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Purpose: In the Breast cancer trials of OraL EveROlimus-2 (BOLERO-2) trial, everolimus plus exemestane improved progression-free survival (PFS) in patients with hormone receptor-positive (HR), human epidermal growth factor receptor 2-negative (HER2) advanced breast cancer (ABC) recurring or progressing on/after prior endocrine therapy (ET), suggesting that dual blockade using targeted therapy and ET was an effective treatment option. Here, we investigated the clinical benefit of combining everolimus with different endocrine partner, letrozole, in a similar patient population.

Methods: In this phase II, open-label, single-arm, multicenter trial, postmenopausal women with HR, HER2 ABC who had recurrence/progression on/after prior ET received everolimus 10 mg daily and letrozole 2.

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Article Synopsis
  • The 21-gene Recurrence Score® (RS) assay helps predict outcomes in ER+ early-stage breast cancer, but there’s a lack of real-life data for patients with high RS scores (≥11).
  • This retrospective study analyzed 1801 ER+ HER2-negative breast cancer patients who underwent RS testing between 2006 and 2010, focusing on their treatment outcomes over an average follow-up of 6.2 years.
  • Results indicated that patients with lower RS scores (RS < 18) had very low rates of distant recurrence and breast cancer death, supporting the effectiveness of endocrine therapy alone, even for those with RS scores of 11-25 who did not receive chemotherapy.
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The Recurrence Score® is increasingly used in node-positive ER+ HER2-negative breast cancer. This retrospective analysis of a prospectively designed registry evaluated treatments/outcomes in node-positive breast cancer patients who were Recurrence Score-tested through Clalit Health Services from 1/2006 through 12/2011 ( = 709). Medical records were reviewed to verify treatments/recurrences/survival.

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