Percutaneous needle biopsy for breast diagnosis: how do surgeons decide?

BACKGROUND: Despite the advent of guidelines recommending core needle biopsy (CNB) for diagnosis of breast abnormalities, it is underused in some jurisdictions. We sought to determine those factors influencing surgeons' choices of breast biopsy techniques.
METHODS: We surveyed 385 general surgeons in Ontario to first determine factors influencing the choice of fine-needle aspiration biopsy (FNAB), CNB, both or neither for diagnosis of breast abnormalities in six clinical scenarios with varying risk of malignancy. Second, respondents were asked to rate 15 patient, organizational, and system factors for their impact on choice of biopsy technique. Third, surgeons were asked to describe their three greatest barriers to provision of cancer care.
RESULTS: Response rate was 44%, and 126 provided answers to the survey questions. When there was a high risk of malignancy, CNB and/or FNAB were favored over surgical biopsy (83% to 97% compared with 41% for presumed benign lesions), and CNB was preferred for percutaneous biopsy over FNAB (58% to 79% compared with 1% to 18%). Patient and clinical factors (46% FNAB, 42% CNB), patient preference for biopsy technique (34%, 31%), and delayed access to CNB, rather than lack of equipment (11% FNAB, 8% CNB) or expertise for CNB or FNAB (15%, 12%), had the greatest reported impact on choice of biopsy technique.
CONCLUSIONS: Surgeon preference for CNB is higher than actual use. Further research is needed to establish whether or how CNB use could be improved by support for shared decision making or facilitating access.