BackgroundFear of surgery has been associated with more postoperative pain, disability, and a lower quality of life among patients undergoing various surgical procedures. While qualitative studies indicate breast cancer patients to be afraid of surgery, detailed quantitative analyses are lacking. The present research aimed at investigating the prevalence, severity, and sources of fear of surgery in this patient group and to compare patients reporting different degrees of such fear.MethodsThis cross-sectional study included 204 breast cancer patients, 18–70 years old, and scheduled for surgery at Oslo University Hospital, Norway. Following their preoperative visit participants completed validated psychological questionnaires online. Among these, the primary outcome measure, the Surgical Fear Questionnaire (SFQ; scores: 0–10 per item, 0–80 overall). Patients were grouped based on SFQ-percentiles (<25th= little, 25th–75th= moderate and >75thpercentile = high fear) and compared on psychological (anxiety, depression, experienced injustice, optimism and expected postsurgical pain), sociodemographic, and medical outcomes.Results195 patients completed the SFQ. On average fear of surgery was low (M = 26.41, SD = 16.0, median = 26, min-max = 0–80), but omnipresent. Only 1.5% (n = 3) indicated no fear at all. Overall, patients feared surgery itself the most (M = 3.64, SD = 2.8). Groups differed significantly (p < .001) in their experience of anxiety, depression, and injustice, as well as their disposition to be optimistic, and expectance of postsurgical pain. Differences between groups concerning demographic and medical information were largely insignificant.DiscussionThis study was the first to demonstrate fear of surgery to be prevalent and relevant among female breast cancer patients. The higher a patients’ fear group, the poorer their preoperative psychological constitution. This, largely irrespective of their current diagnoses or treatments, medical history, and demographics. Fear of surgery might thus cater as a prognostic marker and treatment target in this patient group. However, given the cross-sectional character of the present data, prognostic studies are needed to evaluate such claims.