This is a prospective randomized controlled trial design. Women who have undergone breast cancer surgery (breast conserving surgery or mastectomy) and who meet the eligibility criteria specified will be offered study participation. After obtaining informed consent, subjects will be randomized between two cohorts: scar massage (intervention group) versus no scar massage (control group). The primary outcome is scar-related pain (scored using the McGill Pain Questionnaire Short Form). The secondary outcomes are: upper body range of motion, physical parameters of the scar (pliability, scar height, vascularity and pigmentation scored using the Vancouver Scar Scale), lymphedema (evaluated by arm circumference measurements) and quality of life (using the Functional Assessment of Cancer Therapy (FACT)-B breast cancer-specific instrument).
A sample size of 143 patients per arm was estimated to detect a 30% difference in the primary outcome of postoperative scar-related pain between the intervention and the control groups with 80% statistical power.
