Effect of Manual Lymphatic Drainage on Breast Cancer-Related Postmastectomy Lymphedema: A Meta-analysis of Randomized Controlled Trials.
Level 1 - systematic review of randomized trials
Systematic review and meta-analysis of randomized controlled trials
PubMed 35324506 · doi:10.1097/NCC.0000000000001061
What was done
A systematic search across 4 electronic databases identified randomized controlled trials evaluating manual lymphatic drainage (MLD) compared to no MLD or control for breast cancer-related postmastectomy lymphedema (BCRL). The primary outcome was upper extremity limb volume reduction, analyzed overall and in subgroups stratified by treatment number and duration. A total of 457 patients were analyzed (the abstract does not state the number of trials).
What was found
Overall, MLD showed no statistically significant difference in upper extremity edema compared to control (P = .11). In subgroup analyses, significant reductions in upper extremity volume were found when treatment reached ≥20 sessions (P = .03) and when treatment duration was >2 weeks (P = .03). The abstract does not provide effect sizes, mean differences, or confidence intervals.
Why it matters
The findings suggest that the efficacy of manual lymphatic drainage for breast cancer-related lymphedema may be dose-dependent, requiring at least 20 sessions or more than 2 weeks of therapy to achieve volume reduction.
Limits
The total sample size is relatively small (457 patients across all trials), and the abstract omits the number of included studies, numerical effect sizes, and confidence intervals. Significant outcomes were limited to subgroup analyses, and non-volume endpoints such as function or quality of life were not reported.
Cited by
- partial Multiple peer-reviewed studies show manual lymphatic drainage is useful for treating lymphedema resulting from cancer treatments.