- 2026-01
- The breast journal 2026(1)
Study Design
- Type
- Meta-Analysis
- Population
- patients with idiopathic granulomatous mastitis
- Methods
- systematically evaluated the efficacy and safety of methotrexate in IGM, pooling data from observational studies
Background
Idiopathic granulomatous mastitis (IGM) is a challenging inflammatory breast disease with limited standardized treatment guidelines.Methods
This meta-analysis systematically evaluated the efficacy and safety of methotrexate (MTX) in IGM, pooling data from observational studies. We assessed complete remission rates, recurrence rates, and severe side effects leading to MTX discontinuation using both common and random effects models, accounting for heterogeneity.Results
Nine studies were included. In analyses without control groups, the pooled complete response rate for MTX was 61.6% (95% CI: 40.4-79.2%), with significant heterogeneity (I2 = 81.4%). Combination therapy showed a higher complete response rate in the common effect model (78.0%, 95% CI: 71.4-83.3%) compared to monotherapy (46.6%, 95% CI: 34.2-59.3%), though this difference was not significant in the random effects model. The overall pooled proportion of severe side effects leading to MTX discontinuation was low at 1.23% (95% CI: 0.40-3.74%) in the common effect model and 0.51% (95% CI: 0.03-9.37%) in the random effects model, with no significant heterogeneity. In controlled studies, MTX showed no significant difference in complete remission compared to steroid-containing controls.Conclusion
Based on a pooled complete response rate of 61.6%, MTX appears to be an effective and well-tolerated treatment for IGM, though substantial heterogeneity exists in uncontrolled studies.