PT - JOURNAL ARTICLE AU - Anna Postolova AU - Megan L. Troxell AU - Irene L. Wapnir AU - Mark C. Genovese TI - Methotrexate in the Treatment of Idiopathic Granulomatous Mastitis AID - 10.3899/jrheum.181205 DP - 2020 Jun 01 TA - The Journal of Rheumatology PG - 924--927 VI - 47 IP - 6 4099 - http://www.jrheum.org/content/47/6/924.short 4100 - http://www.jrheum.org/content/47/6/924.full SO - J Rheumatol2020 Jun 01; 47 AB - Objective. Idiopathic granulomatous mastitis (IGM) is a disfiguring inflammatory breast disease without effective treatment. We report the largest IGM cohort treated with methotrexate (MTX) monotherapy.Methods. Chart review was performed on patients evaluated by the Stanford Immunology and Rheumatology Clinic, with histopathologically established IGM treated with MTX, and at least 1 followup appointment.Results. Nineteen female patients with a mean age of 33.5 years were identified. Most failed treatment with antibiotics, prednisone, and surgical intervention. By 15 months of treatment with MTX, 94% had disease improvement and 75% achieved disease remission.Conclusion. MTX monotherapy is an effective treatment for IGM.