Loss of HER2‐positivity following neoadjuvant targeted therapy for breast cancer is not associated with inferior oncologic outcomes

2021 ◽  
Author(s):  
Catherine L. Wetzel ◽  
Thomas L. Sutton ◽  
Stuart Gardiner ◽  
Maryam Farinola ◽  
Nathalie Johnson ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Targeted Therapy ◽  
Oncologic Outcomes ◽  
Her2 Positivity

Comparative Analysis of Human Epidermal Growth Factor Receptor 2 Testing in Breast Cancer According to 2007 and 2013 American Society of Clinical Oncology/College of American Pathologists Guideline Recommendations

2017 ◽  
Vol 35 (26) ◽  
pp. 3039-3045 ◽  
Author(s):  
Wedad M. Hanna ◽  
Elzbieta Slodkowska ◽  
Fang-I Lu ◽  
Houman Nafisi ◽  
Sharon Nofech-Mozes
Keyword(s):  
Breast Cancer ◽  
Epidermal Growth Factor Receptor ◽  
Targeted Therapy ◽  
Growth Factor ◽  
Clinical Oncology ◽  
Growth Factor Receptor ◽  
Her2 Testing ◽  
Epidermal Growth ◽  
American Society ◽  
Her2 Positivity

Purpose To study the effect of the 2013 updates to the 2007 American Society of Clinical Oncology/College of American Pathologists recommendations for human epidermal growth factor receptor 2 (HER2) testing in breast cancer on testing patterns and interpretation in a large regional reference laboratory. Patients and Methods Patient cases with HER2 testing scores for breast biomarker evaluation were selected from our laboratory information system during two 12-month periods (2012 and 2014). The number of tests performed, type of specimens, proportion of HER2-positive and equivocal patient cases, and number of repeat tests on subsequent excisional specimens were examined and compared. Results Although the number of samples tested increased between 2012 and 2014 (2,201 v 2,558 patient cases; 2,278 v 2,659 tumors), HER2 positivity remained constant (15.7% v 15.5%, respectively). The number of repeat tests performed within 6 months more than doubled (122 [5.5%) of 2,201 v 302 [11.8%] of 2,558; P < .001), and the proportion of immunohistochemistry (IHC) 2+ tumors was significantly lower in 2014 than in 2012 (20.3% v 25.3%; P < .001). However, the proportion of patient cases with unresolved HER2 statuses (equivocal by IHC and in situ hybridization) was significantly higher in 2014 (four of 2,278 v 90 of 2,660; P < .001). Conclusion Our findings indicate that the 2013 updates to the American Society of Clinical Oncology/College of American Pathologists recommendations for HER2 testing in breast cancer did not affect the overall HER2-positivity rate or the proportion of patients eligible for HER2-targeted therapy. The proportion of tests and repeat tests performed increased, as did the number of patient cases categorized as ISH equivocal. The benefit of targeted therapy in the equivocal group is not proven, so targeted therapy should not be considered for patients in this category which should be redefined in future iterations of the recommendations.

Effects of COVID-19 on an academic breast oncology center in New York City.

2020 ◽  
Vol 38 (29_suppl) ◽  
pp. 51-51
Author(s):  
Jake Prigoff ◽  
Grace Hillyer ◽  
Fletcher Bell ◽  
Melissa Kate Accordino
Keyword(s):  
Breast Cancer ◽  
Targeted Therapy ◽  
Endocrine Therapy ◽  
Cancer Care ◽  
Management Strategies ◽  
Oncologic Outcomes ◽  
Patient Access ◽  
Breast Cancer Care ◽  
Oncology Patients ◽  
The Impact

51 Background: The influx of patients to the healthcare system due to COVID-19 impacted healthcare practices including the care of breast cancer patients. Our aim is to describe the impact this pandemic had on breast cancer care delivery at an academic center in NYC to inform policy and procedure for future crises that limit patient access to on-site facilities. Methods: A survey was sent to physicians involved in the care of patients with breast cancer at Columbia University Irving Medical Center in May 2020. Participants were asked about practice structure and changes to breast cancer care. The primary outcome was the degree that providers believed breast oncology patients’ clinical outcomes were significantly impacted by COVID-19. Secondary outcomes included changes in diagnostic and management approaches and advice for future providers faced with a similar pandemic. Results: The response rate was 65.4% (17/26). This included physicians from medical oncology (n = 7), radiology (n = 4), breast surgery (n = 3), radiation oncology (n = 2), and plastic surgery (n = 1). Seventy-six percent of physicians somewhat agreed, agreed, or strongly agreed that oncologic outcomes may be significantly impacted by the COVID-19 pandemic. Nearly half (47%) of respondents reported delays in the workup of patients due to COVID-19 with 50.0% for mammograms, 47.5% for bone scans, 46.0% for ultrasounds, 43.8% for PET scans, and 43.3% for biopsies. Eighty-two percent reported delays in overall oncologic management. Delays to systemic therapy were: intravenous/targeted therapy (37.9%), intramuscular/subcutaneous endocrine therapy (28.3%), oral chemotherapy/targeted therapy (22.9%), and oral endocrine therapy (12.8%). Delays to local therapy were: surgery (64.4%) and radiation therapy (44.6%). Almost two-thirds (64.7%) reported it necessary to use alternative oncologic management strategies. The most common piece of advice our providers offered was to increase testing capacity to all patients, especially when coming to a healthcare facility. Conclusions: The COVID-19 pandemic has caused major disruption to breast cancer practices. Breast oncology physicians reported delays in management in over 80% of patients, and the need to use alternative management strategies in over 60% of patients. Effects of these disruptions on oncologic outcomes are unknown, but over 75% of our physicians believe this will significantly impact breast oncology patients’ outcomes. There's a need for policies and procedures to structure patient care should there be a future crisis that limits patient access to oncologic care.

scholarly journals Aptamer-protamine-siRNA nanoparticles in targeted therapy of ErbB3 positive breast cancer cells

2020 ◽  
Vol 590 ◽  
pp. 119963
Author(s):  
Xiangshang Xu ◽  
Li Li ◽  
Xiaolan Li ◽  
Deding Tao ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Targeted Therapy ◽  
Cancer Cells ◽  
Breast Cancer Cells ◽  
Positive Breast Cancer

scholarly journals Pathogenesis and Potential Therapeutic Targets for Triple-Negative Breast Cancer

Cancers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2978
Author(s):  
Chia-Jung Li ◽  
Yen-Dun Tony Tzeng ◽  
Yi-Han Chiu ◽  
Hung-Yu Lin ◽  
Ming-Feng Hou ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Targeted Therapy ◽  
Triple Negative Breast Cancer ◽  
Triple Negative ◽  
High Efficiency ◽  
Early Recurrence ◽  
New Developments ◽  
Great Progress ◽  
Low Toxicity ◽  
Made In

Triple negative breast cancer (TNBC) is a heterogeneous tumor characterized by early recurrence, high invasion, and poor prognosis. Currently, its treatment includes chemotherapy, which shows a suboptimal efficacy. However, with the increasing studies on TNBC subtypes and tumor molecular biology, great progress has been made in targeted therapy for TNBC. The new developments in the treatment of breast cancer include targeted therapy, which has the advantages of accurate positioning, high efficiency, and low toxicity, as compared to surgery, radiotherapy, and chemotherapy. Given its importance as cancer treatment, we review the latest research on the subtypes of TNBC and relevant targeted therapies.

scholarly journals Trastuzumab Mechanism of Action; 20 Years of Research to Unravel a Dilemma

Cancers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 3540
Author(s):  
Hamid Maadi ◽  
Mohammad Hasan Soheilifar ◽  
Won-Shik Choi ◽  
Abdolvahab Moshtaghian ◽  
Zhixiang Wang
Keyword(s):  
Breast Cancer ◽  
Targeted Therapy ◽  
Cancer Patients ◽  
Mechanism Of Action ◽  
Mechanisms Of Action ◽  
Breast Cancer Patients ◽  
Her2 Positive ◽  
Her2 Positive Breast Cancer ◽  
Insight Into ◽  
Positive Breast Cancer

Trastuzumab as a first HER2-targeted therapy for the treatment of HER2-positive breast cancer patients was introduced in 1998. Although trastuzumab has opened a new avenue to treat patients with HER2-positive breast cancer and other types of cancer, some patients are not responsive or become resistant to this treatment. So far, several mechanisms have been suggested for the mode of action of trastuzumab; however, the findings regarding these mechanisms are controversial. In this review, we aimed to provide a detailed insight into the various mechanisms of action of trastuzumab.

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