The less than whole breast radiotherapy approach

Area of Science:

• Oncology
• Radiation Oncology
• Surgical Oncology

Background:

• Conventional whole breast irradiation (WBI) following breast conserving surgery (BCS) improves survival but is lengthy.
• Longer WBI treatment durations negatively impact patient quality of life.

Purpose of the Study:

• To review the rationale and techniques for partial breast irradiation (PBI).
• To evaluate accelerated partial breast irradiation (APBI) as an alternative to WBI.
• To discuss current results and ongoing trials comparing WBI and APBI.

Main Methods:

• Review of techniques for partial breast irradiation, including interstitial brachytherapy, intracavitary brachytherapy (Mammosite), intraoperative radiotherapy, external beam radiotherapy, and permanent seed implant.
• Discussion of the rationale for reducing radiation volume.
• Analysis of existing data on APBI outcomes.
• Overview of 7 prospective randomized controlled trials comparing WBI and APBI.

Main Results:

• APBI involves delivering higher doses of radiation to a limited tissue volume around the tumor cavity.
• Various techniques exist to achieve APBI, each with specific delivery methods.
• Results to date from APBI studies will be presented.
• Ongoing trials are actively recruiting patients to compare WBI and APBI.

Conclusions:

• APBI represents a potentially less burdensome treatment option for select breast cancer patients.
• Further evidence from ongoing randomized trials is crucial for establishing APBI's role.
• The goal is to maintain oncologic efficacy while improving patient quality of life.