Cancers – Page 8 – OncWonk – Dr Bier's Oncology Research Reviews

Dietary Isoflavone Intake and All-Cause Mortality in Breast Cancer Survivors: the Breast Cancer Family Registry

November 23, 2025

Comment: This study provides compelling, high-quality data (although observational) that directly addresses the question of soy safety in a western population. For decades, the bulk of the robust epidemiological evidence linking high isoflavone intake to improved survival was rooted in Asian populations—populations with a lifetime of high whole-soy food consumption. Since women in Western populations […]

Impact of Ipsilateral Blood Draws, Injections, Blood Pressure Measurements, and Air Travel on the Risk of Lymphedema for Patients Treated for Breast Cancer

November 22, 2025

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| Cancer - Breast, Mastectomy-Lumpectomy

Comment: Although this study came out almost 10 years ago, I still regularly have to reassure patients that it’s fine to take a blood pressure or do a blood draw or the side of their surgery. For decades, the caution against ipsilateral blood draws, BP checks, injections, and flying was “logical”—it made sense that trauma […]

Risk Reduction – Relative vs. Absolute

November 20, 2025

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| Cancer - Breast, Statistics

Audio Overview: Relative vs. Absolute Risk Reduction: Understanding the True Benefit of a Medical Study When reviewing a new medical study—whether it involves a conventional drug, a supplement, or a lifestyle change—you will often see two different numbers used to describe the treatment’s effectiveness: the Relative Risk Reduction and the Absolute Risk Reduction. These two […]

Review: the impacts of circulating 25-hydroxyvitamin D levels on cancer patient outcomes: a systematic review and meta-analysis

November 19, 2025

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| Cancers

💡 Comment: The Moderate certainty evidence presented in this meta-analysis underscores the profound impact of circulating 25-hydroxyvitamin D [25(OH)D] levels on cancer patient outcomes. Although this analysis is limited to colorectal cancer, breast cancer, and lymphoma, there’s no reason to believe it doesn’t apply across the board. Yes it is based on observational studies and […]

Radiation Therapy for Breast Cancer – Synthesis

November 16, 2025

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| Cancer - Breast, Radiation Therapy, Synthesis

☢️Synthesized Clinical Bottom Line Updated 11-16-2025 The provided collection of research, which includes three major Phase 3 randomized controlled trials (RCTs), supplies strong evidence for the de-escalation of radiation therapy in several common breast cancer settings. The central, unifying theme is that the survival benefits historically attributed to radiation have been substantially or entirely negated […]

Real-world impact of postmastectomy radiotherapy in T1–2 breast cancer with one to three positive lymph nodes

November 16, 2025

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| Cancer - Breast, Mastectomy-Lumpectomy, Miscellaneous, Radiation Therapy

Comment: This SEER data review of T1-2N1 breast cancer patients continues the trend we’ve been observing: Postmastectomy Radiotherapy (PMRT) rarely translates into a statistically significant survival advantage in the modern setting. After adjusting for selection bias using Propensity Score Matching (PSM), the 5-year Breast Cancer-Specific Survival (BCSS) was comparable between the PMRT and non-PMRT groups. […]

Ten-Year Survival after Postmastectomy Chest-Wall Irradiation in Breast Cancer

November 16, 2025

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| Cancer - Breast, Radiation Therapy

📝 Comment: This trial provides a critical, high-level confirmation: modern systemic therapy has fundamentally changed the risk/benefit profile of post-mastectomy chest-wall irradiation (CWI) for intermediate-risk breast cancer. The key takeaway is that for the overall population, a minimal absolute reduction in local recurrence (less than 2 percentage points) did not translate into an Overall Survival […]

Omitting Regional Nodal Irradiation after Response to Neoadjuvant Chemotherapy

November 16, 2025

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| Cancer - Breast, Radiation Therapy

📝 Comment: This trial delivers definitive knowledge: Regional Nodal Irradiation (RNI) offers no measurable oncologic benefit for the increasingly common patient population that achieves pathologic complete response (ypN0) after neoadjuvant chemotherapy. The five-year data unequivocally demonstrate that RNI fails to significantly improve the primary endpoint—invasive breast cancer recurrence-free interval (HR 0.88, p = 0.51)—or any key […]

Breast-Conserving Surgery with or without Irradiation in Early Breast Cancer

November 15, 2025

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| Cancer - Breast, Radiation Therapy, Treatments – Conventional

Comment: This 10-year follow-up of the PRIME II trial reinforces a crucial point for managing older patients with low-risk, hormone-positive breast cancer. Yes, omitting radiotherapy after breast-conserving surgery increased the 10-year local recurrence rate significantly (from 0.9% to 9.5%). However, the definitive, practice-changing finding is that this 10-fold increase in local recurrence had zero impact on […]

Soy Consumption and Breast Cancer Outcomes – Synthesis

November 15, 2025

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| Cancer - Breast, Synthesis

🌱Synthesized Clinical Bottom Line updated 11-15-2025 The provided body of evidence, including two meta-analyses and several large prospective cohort studies, indicates that post-diagnosis soy food consumption is safe and likely beneficial for breast cancer survivors. Contrary to long-standing concerns fueled by inapplicable mouse models, the human data consistently show that moderate soy intake is associated […]