Abstract
Post-mastectomy pain syndrome (PMPS) is a recognized problem associated with functional disability. It is defined as pain in the anterior or lateral region of thorax, axilla, and/or medial upper arm after surgery without infection or tumor recurrence. The aim of this study is to analyze the disability associated with pain, to identify and describe the characteristics of pain at different stages after breast cancer surgery in a sample of women referred to a Rehabilitation Unit.
Method: Single-center retrospective observational study. Pain perception was categorized according to predominant type (neuropathic, musculoskeletal, or related to lymphatic dysfunction). Disability was assessed using Quick Dash score.
Statistical analysis: Descriptive study of the sample, Spearman’s non-linear correlation was used to check the association between ordinal and qualitative variables and Linear logistic regression was performed to test the influence of variables on pain and disability perception.
Results: 128 women, 23.06% of the total sample, had PMPS. Mean age: 57.12; Mean BMI:27.05. The most common cause of pain was neuropathic. Mean Quick Dash score: 49.26.
There was moderate correlation between BMI and Quick Dash: R=0.182; p: 0.049; and between time elapsed since surgery and our assessment (rs = 0.31) for feeling pain. There was a low correlation between BMI (rs = 0.17), age (rs = 0.14) and pain, low negative correlation between surgery (rs = -0.27) and radiotherapy (rs = -0.09). There was a very low correlation between chemotherapy and perceived disability (rs = 0.16) and a very low negative correlation between perceived disability and use of radiotherapy (rs = -0.13).
Conclusions: Among women treated for breast cancer, neuropathic pain is the most common, but characteristics aren’t related to the level of disability. Surgical techniques, radiotherapy, older age, and high BMI predispose to PMPS. Time since surgery and high BMI predispose to high levels of disability.
Keywords
Post-mastectomy pain syndrome, Disability, Quick Dash score, Breast cancer