Early-Stage Breast Cancer: A Critical Review of Current and Emerging Practice

Area of Science:

• Oncology
• Radiation Oncology
• Breast Cancer Research

Background:

• Breast-conserving surgery followed by adjuvant radiation is standard for early-stage breast cancer (ESBC).
• Understanding ESBC heterogeneity drives personalized treatment strategies.
• Advances in radiobiology inform new radiation fractionation approaches.

Purpose of the Study:

• To review recent evidence and ongoing research in radiotherapeutic management of ESBC.
• To discuss personalized treatment strategies including boost, accelerated fractionation, partial breast irradiation, and radiation omission.
• To explore the role of molecular profiling and novel radiation techniques in ESBC management.

Main Methods:

• Review of recent clinical trials and scientific literature on breast cancer radiotherapy.
• Analysis of data on moderate and ultrahypofractionated radiation regimens.
• Discussion of molecular profiling's impact on radiation decision-making.

Main Results:

• Hypofractionated radiation shows effectiveness and tolerability, leading to practice changes.
• Opportunities exist for tailored radiation approaches like boost, accelerated fractionation, and partial breast irradiation.
• Radiation omission may be suitable for low-risk ESBC patients.

Conclusions:

• Personalized radiotherapy, informed by molecular profiling, is crucial for optimizing ESBC treatment.
• Advances in fractionation and delivery techniques offer improved outcomes and reduced toxicity.
• Future research directions include novel primary radiation strategies and reirradiation protocols.