Reimagining Deintensification for Low-Risk Breast Cancer

Area of Science:

• Oncology
• Surgical Oncology
• Radiation Oncology
• Medical Oncology

Background:

• Improving outcomes for low-risk breast cancer necessitate treatment deintensification.
• Current paradigms focus on enhancing the therapeutic ratio by reducing treatment toxicity.
• Deintensification strategies are being explored across surgery, radiation, and systemic therapy.

Purpose of the Study:

• To review and summarize current deintensification approaches in breast cancer treatment.
• To highlight advancements in surgical, radiotherapeutic, and systemic therapy deintensification.
• To propose future interdisciplinary deintensification strategies for low-risk breast cancer.

Main Methods:

• Review of recent studies and clinical trials in breast cancer treatment deintensification.
• Analysis of data regarding surgical margin, axillary surgery, radiation therapy duration and target, and systemic therapy utilization.
• Synthesis of findings to identify trends and future directions in breast cancer management.

Main Results:

• Surgical deintensification includes narrower margins, reduced re-excisions, and decreased need for axillary lymph node dissection or sentinel lymph node biopsy.
• Radiation therapy deintensification has led to shorter treatment durations (e.g., five treatments) and reduced treatment targets.
• Systemic therapy deintensification involves reduced chemotherapy use via genomic assays and potential endocrine therapy dose reduction for ductal carcinoma in situ.

Conclusions:

• Deintensification efforts have successfully reduced treatment burden in breast cancer.
• Future research should focus on interdisciplinary approaches, such as comparing radiation therapy alone versus endocrine therapy alone for select low-risk cases.
• Optimizing the therapeutic ratio remains a key goal for improving patient quality of life.