Background: Risk factors for local recurrence after mastectomy in ductal carcinoma in situ (DCIS) emerged as a grey area during the second "Assisi Think Tank Meeting" (ATTM) on Breast Cancer.
Aim: To review practice patterns of post-mastectomy radiation therapy (PMRT) in DCIS, identify risk factors for recurrence and select suitable candidates for PMRT.
Methods: A questionnaire concerning DCIS management, focusing on PMRT, was distributed online via SurveyMonkey.
Results: 142 responses were received from 15 countries. The majority worked in academic institutions, had 5-20 years work-experience and irradiated <5 DCIS patients/year. PMRT was more given if: surgical margins <1 mm, high-grade, multicentricity, young age, tumour size >5 cm, skin- or nipple- sparing mastectomy. Moderate hypofractionation was the most common schedule, except after immediate breast reconstruction (57% conventional fractionation).
Conclusions: The present survey highlighted risk factors for PMRT administration, which should be further evaluated.
Keywords: Breast cancer; Ductal carcinoma in situ; Hypofractionation; Post-mastectomy radiotherapy; Survey.
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