• Kimberley Nguyen, Penny Mackenzie, Angela Allen, Marcus Dreosti, Marita Morgia, Yvonne Zissiadis, Gilian Lamoury, and Apsara Windsor.
• Central Coast Cancer Centre, Gosford Hospital, Gosford, New South Wales, Australia.
• J Med Imaging Radiat Oncol. 2017 Aug 1; 61 (4): 508-516.

IntroductionThis patterns of practice study was conducted on behalf of the RANZCR Breast Interest Group in order to document current radiotherapy practices for breast cancer in Australia and New Zealand. The survey identifies variations and highlights potential contentious aspects of radiotherapy management of breast cancer.MethodsA fifty-eight question survey was disseminated via the Survey Monkey digital platform to 388 Radiation Oncologists in Australia and New Zealand.ResultsIn total, 156 responses were received and collated. Areas of notable consensus among respondents included hypofractionation (77.3% of respondents would 'always' or 'sometimes' consider hypofractionation in the management of ductal carcinoma in-situ and 99.3% in early invasive breast cancer); margin status in early breast cancer (73.8% believe a clear inked margin is sufficient and does not require further surgery) and use of bolus in post-mastectomy radiotherapy (PMRT) (91.1% of participants use bolus in PMRT). Areas with a wider degree of variability amongst respondents included regional nodal irradiation and components of radiotherapy planning and delivery (examples include the technique used for delivery of boost and frequency of bolus application for PMRT).ConclusionThe results of these patterns of practice survey informs radiation oncologists in Australia and New Zealand of the current clinical practices being implemented by their peers. The survey identifies areas of consensus and contention, the latter of which may lead to a development of research trials and/or educational activities to address these areas of uncertainty.© 2016 The Royal Australian and New Zealand College of Radiologists.

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