Abstract P1-20-27: Changes in the shoulder range of motion, strength after breast cancer surgery: An observational study

Abstract

Abstract Purpose: The importance of rehabilitation after breast surgery is valued, yet changes in range of motion (ROM) and shoulder strength after surgery have not been elucidated. The aim of this study was to explore the shoulder ROM and strength in both surgery (SS) and non-surgery side (NSS) after breast cancer surgery for up to four weeks. Methods: Twenty-five patients (7 total mastectomy, 18 partial mastectomy) were observed five times: the day before surgery, on discharge day (post operate day; POD 1 or 2), the 1st outpatient visit (POD 7-10), the 2nd outpatient visit (POD 14-15), and 3rd outpatient visit (POD 21-25). The primary outcomes were ROM and strength of both the SS and NSS. Results: While ROM declined only in the shoulder of the SS, shoulder strength declined in both SS and NSS. Greatest reduction in shoulder strength was observed in flexion (SS: -43.9% to -45.3%, NSS: -14.2% to -35.8%) and abduction in both SS and NSS (SS: -41.1% to -52.5%, NSS: -16.3% to -30.6%). Shoulder strength on the SS decline immediately after surgery, which remained low after four weeks. Shoulder strength of the NSS continually declined after surgery up to four weeks. Conclusion:These results provide preliminary evidence for clinicians to understand the changes of shoulder ROM, strength, and function after surgery in breast cancer patients. Rehabilitation exercises should be implemented in both SS and NSS. Citation Format: Jihee Min, Sujin Yeon, Jinjoo Min, Jee Ye Kim, Seung Il Kim, Ha-Nui Park, Jeong min Lee, Justin Y. Jeon. Changes in the shoulder range of motion, strength after breast cancer surgery: An observational study [abstract]. In: Proceedings of the 2019 San Antonio Breast Cancer Symposium; 2019 Dec 10-14; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2020;80(4 Suppl):Abstract nr P1-20-27.