Breast cancer treatment beliefs and influences among surgeons in areas of scientific uncertainty

Background Breast cancer treatment beliefs in areas of scientific uncertainty may contribute to widely variable practices. We sought to better describe surgeons' beliefs and to identify the relative importance of different information sources on surgeons' decision-making. Methods A total of 2,188 American College of Surgeons (ACoS) members were surveyed on their treatment beliefs in 4 controversial areas and on the perceived influence of various information sources on their decision-making. Responses were analyzed by sex, practice type, oncology training, professional society membership, and breast cancer patient volume. Results Nine hundred twenty-three responses were received, with 459 eligible for analysis. Responses diverged most regarding significance of positive sentinel lymph node biopsy (SNLB) and role of post-lumpectomy radiation for low-risk ductal carcinoma-in-situ (DCIS). Overall, expert opinion ranked as the most influential information source. Conclusions Axillary dissection after positive SLNB and post-lumpectomy radiation in low-risk DCIS denoted areas of greater uncertainty. Breast cancer opinion leaders have substantial influence when standard practice is uncertain.