BACKGROUND AND OBJECTIVES: We assessed the cumulative incidence, symptoms, and risk factors for upper-extremity lymphedema in breast cancer and melanoma patients undergoing sentinel lymph node biopsy or axillary lymph node dissection. METHODS: Patients were recruited preoperatively (time 0) and assessed at 6, 12, and 18 months postoperatively. Limb volume change (LVC) was measured by perometry. Lymphedema was categorized as none, mild (LVC 5-9.9%), or moderate/severe (LVC≥10%). Symptoms were assessed with a validated lymphedema instrument. Longitudinal logistic regression analyses were conducted to identify risk factors associated with moderate/severe lymphedema. RESULTS: Among 205 breast cancer and 144 melanoma patients, the cumulative incidence of moderate/severe lymphedema at 18 months was 36.5% and 35.0%, respectively. However, in adjusted analyses, factors associated with moderate/severe lymphedema were breast cancer (OR 2.0, P = 0.03), body mass index ≥ 30 kg/m(2) (OR 1.6, P = 0.04), greater number of lymph nodes removed (OR 1.05, P < 0.01), and longer interval since surgery (OR 2.33 at 18 months, P < 0.01). CONCLUSIONS: Lymphedema incidence increased over time in both cohorts. However, the adjusted risk of moderate/severe lymphedema was two-fold higher in breast cancer patients. These results may be attributed to surgical treatment of the primary tumor in the breast and more frequent use of radiation.
BACKGROUND AND OBJECTIVES: We assessed the cumulative incidence, symptoms, and risk factors for upper-extremity lymphedema in breast cancer and melanomapatients undergoing sentinel lymph node biopsy or axillary lymph node dissection. METHODS:Patients were recruited preoperatively (time 0) and assessed at 6, 12, and 18 months postoperatively. Limb volume change (LVC) was measured by perometry. Lymphedema was categorized as none, mild (LVC 5-9.9%), or moderate/severe (LVC≥10%). Symptoms were assessed with a validated lymphedema instrument. Longitudinal logistic regression analyses were conducted to identify risk factors associated with moderate/severe lymphedema. RESULTS: Among 205 breast cancer and 144 melanomapatients, the cumulative incidence of moderate/severe lymphedema at 18 months was 36.5% and 35.0%, respectively. However, in adjusted analyses, factors associated with moderate/severe lymphedema were breast cancer (OR 2.0, P = 0.03), body mass index ≥ 30 kg/m(2) (OR 1.6, P = 0.04), greater number of lymph nodes removed (OR 1.05, P < 0.01), and longer interval since surgery (OR 2.33 at 18 months, P < 0.01). CONCLUSIONS:Lymphedema incidence increased over time in both cohorts. However, the adjusted risk of moderate/severe lymphedema was two-fold higher in breast cancerpatients. These results may be attributed to surgical treatment of the primary tumor in the breast and more frequent use of radiation.
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