Publications by authors named "Olwen M Hahn"

Importance: Observational studies of survivors of breast cancer and prospective trials of aspirin for cardiovascular disease suggest improved breast cancer survival among aspirin users, but prospective studies of aspirin to prevent breast cancer recurrence are lacking.

Objective: To determine whether aspirin decreases the risk of invasive cancer events among survivors of breast cancer.

Design, Setting, And Participants: A011502, a phase 3, randomized, placebo-controlled, double-blind trial conducted in the United States and Canada with 3020 participants who had high-risk nonmetastatic breast cancer, enrolled participants from 534 sites from January 6, 2017, through December 4, 2020, with follow-up to March 4, 2023.

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Background: Guidelines recommend the use of genomic assays such as OncotypeDx to aid in decisions regarding the use of chemotherapy for hormone receptor-positive, HER2-negative (HR+/HER2-) breast cancer. The RSClin prognostic tool integrates OncotypeDx and clinicopathologic features to predict distant recurrence and chemotherapy benefit, but further validation is needed before broad clinical adoption.

Methods: This study included patients from the National Cancer Data Base (NCDB) who were diagnosed with stage I-III HR+/HER2- breast cancer from 2010 to 2020 and received adjuvant endocrine therapy with or without chemotherapy.

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With cancer incidence increasing worldwide, physicians with cancer research training are needed. The Scholars in Oncology-Associated Research (SOAR) cancer research education program was developed to train medical students in cancer research while exposing them to the breadth of clinical oncology. Due to the COVID-19 pandemic, SOAR transitioned from in-person in 2019 to virtual in 2020 and hybrid in 2021.

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Article Synopsis
  • The study looked at if breast-conserving therapy (BCT) is a safe treatment for women with multiple spots of breast cancer.
  • They found that the treatment resulted in a low chance (3.1%) of the cancer coming back after five years for most patients who participated in the trial.
  • It was noted that women who had a pre-surgery MRI had a much lower chance of cancer returning, suggesting that using MRI before surgery can be very helpful.
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Importance: Given conflicting results regarding the prognosis of erb-b2 receptor tyrosine kinase 2 (ERBB2; formerly HER2 or HER2/neu)-low breast cancer, a large-scale, nationally applicable comparison of ERBB2-low vs ERBB2-negative breast cancer is needed.

Objective: To investigate whether ERBB2-low breast cancer is a clinically distinct subtype in terms of epidemiological characteristics, prognosis, and response to neoadjuvant chemotherapy.

Design/participants/setting: This retrospective cohort study was conducted using the National Cancer Database, including 1 136 016 patients in the US diagnosed with invasive breast cancer from January 1, 2010, to December 31, 2019, who had ERBB2-negative disease and had immunohistochemistry results available.

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Purpose: CALGB 40603 (NCT00861705), a 2 × 2 randomized phase II trial, demonstrated that adding carboplatin or bevacizumab to weekly paclitaxel (wP) followed by doxorubicin and cyclophosphamide significantly increased the pathologic complete response (pCR) rate in stage II-III triple-negative breast cancer. We now report long-term outcomes (LTOs) and correlative science end points.

Patients And Methods: The Kaplan-Meier method was used to estimate LTOs in 443 patients who initiated study treatment.

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The COVID-19 pandemic has had widespread impact on healthcare, resulting in modifications to how we perform cancer research, including clinical trials for cancer. The impact of some healthcare workers and study coordinators working remotely and patients minimizing visits to medical facilities impacted clinical trial participation. Clinical trial accrual dropped at the onset of the pandemic, with improvement over time.

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Purpose: CD137 agonism and CSF1R blockade augment stereotactic body radiotherapy (SBRT) and anti-programmed death-1 in preclinical models. We evaluated the safety and efficacy of SBRT with nivolumab+urelumab (CD137 agonist) or nivolumab+cabiralizumab (CSF1R inhibitor).

Patients And Methods: This phase I clinical trial enrolled patients with advanced solid tumors that had progressed on standard therapies.

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Background: Cyclin-dependent kinase 4/6 (CDK4/6) inhibitors, including palbociclib, are approved to treat hormone receptor (HR)-positive/human epidermal growth factor receptor 2 (HER2)-negative advanced breast cancer (ABC) and are associated with hematologic toxicity. African American women, who are underrepresented in CDK4/6 inhibitor clinical trials, may experience worse neutropenia because of benign ethnic neutropenia. The authors specifically investigated the hematologic safety of palbociclib in African American women with HR-positive/HER2-negative ABC.

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Article Synopsis
  • Goals of care discussions (GOCD) are important for helping cancer patients, but doctors sometimes have different roles in these talks.
  • A survey was sent to a lot of doctors to find out how often they have these discussions and how comfortable they feel doing them.
  • The results showed that medical oncologists (MO) felt better prepared and valued these talks more than radiation oncologists (RO), which means more teamwork might be needed for better patient care.
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Purpose: Men with low serum testosterone at the time of prostate cancer diagnosis are frequently considered to have more aggressive disease. We examined treatment outcomes in men with clinically localized high-risk cancer to determine if baseline testosterone level identified men at higher risk for cancer progression after treatment.

Materials And Methods: Alliance/CALGB 90203 randomized men with clinically localized high-risk prostate cancer to radical prostatectomy alone or neoadjuvant chemohormonal therapy and radical prostatectomy.

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Purpose: Radical prostatectomy (RP) alone is often inadequate in curing men with clinically localized, high-risk prostate cancer (PC). We hypothesized that chemohormonal therapy (CHT) with androgen-deprivation therapy plus docetaxel before RP would improve biochemical progression-free survival (BPFS) over RP alone.

Patients And Methods: Men with clinically localized, high-risk PC were assigned to RP alone or neoadjuvant CHT with androgen deprivation plus docetaxel (75 mg/m body surface area every 3 weeks for 6 cycles) and RP.

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Article Synopsis
  • - The study investigates the side effects of capecitabine, a drug used for treating breast cancer, focusing on diarrhea and hand-foot syndrome (HFS) that can impact patient quality of life and treatment adherence.
  • - Researchers analyzed data from 259 metastatic breast cancer patients using both in-person and automated phone assessments to identify genotypes linked to these toxicities, finding several single nucleotide polymorphisms (SNPs) significantly associated with the side effects.
  • - The findings suggest that these genetic markers could help tailor capecitabine dosing to minimize side effects, marking a promising step toward personalized cancer treatment based on individual genetic profiles.
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Background: In hormone receptor-positive advanced breast cancer, a progression-free survival benefit was reported with addition of bevacizumab to first-line letrozole. However, increased toxicity was observed. We hypothesized that functional age measures could be used to identify patients at risk for toxicity while receiving letrozole plus bevacizumab for hormone receptor-positive advanced breast cancer.

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As the population of patients with cancer and survivors grows, physician knowledge of oncology clinical care and research is increasingly important. Despite this patient population growth, medical students and non-oncology physicians report insufficient oncologic and survivorship care training. First-year students at a single US medical school completing a summer research experience were invited to participate in integrated Scholars in Oncology-Associated Research (SOAR) program.

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Purpose Tumor overexpression of cyclooxygenase-2 (COX-2) has been associated with worse outcome in non-small-cell lung cancer (NSCLC). In Cancer and Leukemia Group B (CALGB) 30203, we found that the selective COX-2 inhibitor celecoxib in addition to chemotherapy in advanced NSCLC improved progression-free and overall survival in patients with moderate to high COX-2 expression by immunohistochemistry (IHC). CALGB 30801 (Alliance) was designed to prospectively confirm that finding.

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Oncologists must have a strong understanding of collaborating specialties in order to deliver optimal cancer care. The objective of this study was to quantify current interdisciplinary oncology education among oncology training programs across the USA, identify effective teaching modalities, and assess communication skills training. Web-based surveys were sent to oncology trainees and program directors (PDs) across the USA on April 1, 2013 and October 8, 2013, respectively.

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Purpose: Terminal oncology intensive care unit (ICU) hospitalizations are associated with high costs and inferior quality of care. This study identifies and characterizes potentially avoidable terminal admissions of oncology patients to ICUs.

Methods: This was a retrospective case series of patients cared for in an academic medical center's ambulatory oncology practice who died in an ICU during July 1, 2012 to June 30, 2013.

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Metastases-directed therapy via surgery or stereotactic body radiotherapy (SBRT) has become the de facto standard of care in the United States and abroad despite a lack of high quality prospective, randomized trials. Oligometastatic tumors may behave in an inherently more indolent manner secondary to underlying biologic characteristics, including discrepant microRNA expression patterns. This biologic discrepancy suggests that historic improvements in survival observed in retrospective series may stem from the inherent biology of oligometastases and selection biases as opposed to advances in novel localized treatments.

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Purpose: One third of patients with triple-negative breast cancer (TNBC) achieve pathologic complete response (pCR) with standard neoadjuvant chemotherapy (NACT). CALGB 40603 (Alliance), a 2 × 2 factorial, open-label, randomized phase II trial, evaluated the impact of adding carboplatin and/or bevacizumab.

Patients And Methods: Patients (N = 443) with stage II to III TNBC received paclitaxel 80 mg/m(2) once per week (wP) for 12 weeks, followed by doxorubicin plus cyclophosphamide once every 2 weeks (ddAC) for four cycles, and were randomly assigned to concurrent carboplatin (area under curve 6) once every 3 weeks for four cycles and/or bevacizumab 10 mg/kg once every 2 weeks for nine cycles.

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Comparative effectiveness research (CER) has been promoted as a way to improve the translation gap between clinical research and everyday clinical practice as well as to deliver more cost-effective health care. CER will account for a significant portion of funding allocated by the US government for health care research. Oncology has a rich history of improving clinical outcomes and advancing research through randomized controlled trials (RCTs).

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Objectives: Renal cell carcinoma (RCC) is considered radioresistant, but stereotactic radiosurgery can control intracranial metastases. Advances in radiotherapy, such as stereotactic body radiotherapy (SBRT), allow high-dose radiation delivery to extracranial sites. Herein, we report our experience treating oligometastatic RCC with SBRT.

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Preclinical models suggested that activating mutations of the PIK3CA gene are associated with sensitivity to inhibitors of the mammalian target of rapamycin (mTOR). In breast cancers, PIK3CA mutations are associated with estrogen receptor (ER) positivity. We therefore performed an open-label single arm phase II study of the rapamycin analog, temsirolimus, at a dose of 25 mg weekly, in women with pretreated breast cancers that were positive for ER, PR, or HER2.

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Objectives: Renal cancer is resistant to most DNA and DNA repair targeted chemotherapy; although moderate response rates to nucleotide analog based therapy have been reported. Bevacizumab also has activity. We thus performed a phase II trial of gemcitabine, capecitabine, and bevacizumab in patients with metastatic renal cancer.

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Purpose: Sorafenib is an antiangiogenic agent with activity in renal cancer. We conducted a randomized trial to investigate dynamic contrast magnetic resonance imaging (DCE-MRI) as a pharmacodynamic biomarker.

Patients And Methods: Patients were randomly assigned to placebo or 200 or 400 mg twice per day of sorafenib.

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