Abstract P4-17-01: Attitudes of medical oncologists towards research breast biopsies in patients with newly diagnosed stage I-III breast cancer not enrolled in a clinical trial

Background: Patients (pts) with breast cancer treated with neo-adjuvant therapy on clinical trials are often asked to consent to pre-treatment and on-treatment research biopsies. There is increasing interest in obtaining tissue samples at similar time points in pts treated with neo-adjuvant therapy outside of clinical trials. However, medical oncologists’ (MOs) attitudes towards approaching pts about research biopsies in this setting are unknown. Methods: Three hundred and nine academic breast MOs identified from websites of the National Cancer Institute (NCI) – designated cancer centers were asked to complete a survey either by paper or online. Eligible MOs (MOs who saw breast cancer pts and who saw pts >4 hours/week.) were asked to predict what proportion of their pts with newly diagnosed, non-metastatic breast cancer would consent to research purposes only biopsies (RPOBs) i.e., biopsies with no clinical benefit to pt. Median values are reported. Two-sided Fisher’s exact test was used to compare categorical variables using a α level of .05. Results: Of 221 (101F,85M, 5 unknown) MOs who completed the survey, 30 MOs were ineligible (response rate=221/309,72%). Median age was 50 (Range 33-80). Median years of oncology experience was 15 (Range 1-45). MOs predicted that 14%, 63% and 21% of their pts would definitely/probably, maybe, probably not/definitely not consent to a RPOB of the breast. Forty-one percent, 34%, 19%, 3% of MOs were very comfortable, somewhat comfortable, somewhat uncomfortable, and very uncomfortable asking pts to consent to RPOBs respectively. The only factor associated with increased comfort discussing an RPOB was MOs’ years in practice. MOs with fewer years ( 15 years) (Adjusted RR=1.2, p =0.02). Gender, number of pts enrolled onto clinical trials, and MOs with pts who had research biopsies in the last 3 months was not associated with increased comfort. MOs who were more comfortable in approaching pts for RPOBs were associated with estimating a larger proportion of their pts as willing to undergo RPOB. For example, nearly one third of MOs who were very comfortable with approaching pts for RPOBs estimated that greater than 50% of their pts would consent to research biopsies. In contrast, nearly all the MOs who were very uncomfortable with approaching pts for RPOBs estimated that less than 25% of their pts would consent to research biopsies. The 3 most common reasons why MOs were reluctant to consent pts for a RPOB include pain/discomfort of a biopsy (59%), risk of a biopsy procedure complication, (44%), and inconvenience to the pt (33%). Conclusions: Academic breast MO’s predicted that fewer than 1 in 5 women with newly diagnosed, non-metastatic breast cancer would definitely or probably agree to a request for an RPOB outside of the context of a therapeutic trial, and approximately one-quarter of MOs expressed discomfort in approaching pts for such procedures. Our results have important implications regarding the feasibility of such research efforts, and identify potential barriers to target for intervention. Citation Format: Davinia SE Seah, Sarah Scott, Hao Guo, Julie Najita, Ruth Lederman, Elizabeth Frank, Jessica Sohl, Zsofia Stadler, Stuart G Silverman, Jeffrey Peppercorn, Eric P Winer, Steve E Come, Nancy U Lin. Attitudes of medical oncologists towards research breast biopsies in patients with newly diagnosed stage I-III breast cancer not enrolled in a clinical trial [abstract]. In: Proceedings of the Thirty-Seventh Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2014 Dec 9-13; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2015;75(9 Suppl):Abstract nr P4-17-01.