Acupuncture Needles and the Risk of Lymphedema After Breast Cancer Surgery: A Retrospective National Cohort Study

Abstract

Background: Controversies remain over the impact of using needles on breast cancer patients after surgery due to risk of breast cancer-related lymphedema (BCRL). While recent literature suggests that vascular access during the postsurgical stage does not affect the risk of BCRL, the impact of acupuncture on the risk of BCRL during the postsurgical stage has not been studied.Methods: This study included 35,153 patients from 2011 to 2013 who were newly diagnosed with breast cancer in a population-based cohort from the Korean National Health Insurance Service database. All patients received breast surgery, and the treatment group received acupuncture for more than 3 sessions in the 3-6 months post-surgery. The control group did not receive acupuncture. The incidence rate ratio, Kaplan-Meier curve, and Cox proportional hazards models were used to compare the risk of BCRL, and death between groups.Results: About 5.8% of the study population received acupuncture during the 3-6 months post-surgery treatment window. After propensity score matching, the acupuncture treatment group did not show an increased risk of BCRL (IRR 1.017, 95% CI 0.868-1.193; unadjusted HR 1.018, 95% CI 0.868-1.193). This risk was robust in all multivariate Cox proportional hazards models.Conclusion: An association of BCRL with acupuncture was not observed. Patients who received acupuncture to manage symptoms such as pain during the 3-6 months postsurgical stage did not have a higher risk of developing BCRL. Breast cancer patients who seek acupuncture to alleviate post-surgery symptoms such as pain, can receive acupuncture without concerns for potential risk of BCRL.