A multicentre feasibility study of partial breast irradiation using 3D conformal radiotherapy for early breast cancer [ 2007 - 2009 ]

Research Grant

Researchers: Prof Boon Chua (Principal investigator) ,  A/Pr Graeme Morgan ,  Mr David Willis ,  Prof Penelope Schofield ,  Prof Tomas Kron

Brief description Breast conserving therapy (BCT) is an accepted treatment option for most women with early breast cancer. Whole breast irradiation (WBI) after breast conserving surgery substantially reduces the risk of breast recurrence. However, the prolonged 5-7 week course of WBI substantially decreases the quality of life (QoL) experienced by women and is a logistical problem particularly for the elderly and women who reside far from a radiotherapy (RT) facility. In order to improve the access and convenience of BCT, accelerated partial breast irradiation (APBI) is being investigated. Research shows that 75% of the breast recurrences occur at the tumour bed after BCT implying that in selected women, RT may be limited to the tumour bed only. By limiting the breast volume irradiated, it is feasible to accelerate radiation dose delivery and reduce overall treatment time. In addition, a shorter schedule permits more efficient use of RT resources. To determine if APBI could replace WBI as standard of care for selected women with early breast cancer treated with BCT, it is necessary to demonstrate its technical feasibility and equivalence of outcomes compared to WBI. This study investigates the feasibility, toxicity, cosmetic outcome, local control and QoL of women with early breast cancer treated with APBI using a novel technique. It uses advanced 3-dimensional RT planning and multiple fields shaped to conform to the target volume (tumour bed) and spare the normal organs. It is more likely than the other modalities to be adopted as the preferred APBI technique in Australia because it uses equipments readily available in most RT centres and being non-invasive, is likely to be preferred by patients. However, its feasibility in multiple Australian centres with varying RT equipments is unclear. Given the current high level of international interest, it is timely to conduct this feasibility study in preparation for large scale research to determine if APBI may replace WBI in BCT.

Funding Amount $AUD 154,910.05

Funding Scheme NHMRC Project Grants

Notes Standard Project Grant