ArticleCureus2025
Clinical Outcomes of Rituximab Infusion Among Refractory Myasthenia Gravis Patients in the Philippines: A 10-Year Retrospective Study.
Article in Cureus, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundMyasthenia gravis (MG) is an autoimmune disorder causing muscle weakness, with 10%-20% of cases becoming refractory to standard treatments. Rituximab, a CD20-targeting monoclonal antibody, has shown promise in refractory MG but lacks data from low- and middle-income countries (LMICs), such as the Philippines.
methodsA retrospective, cross-sectional study was conducted in treatment-refractory MG patients in St. Luke's Medical Center in the Philippines between January 2014 and December 2023. Clinical outcomes were assessed before and after treatment, including MGFA scores, pyridostigmine dosage, and CD19/CD20 levels. Subgroup analyses were performed based on thymectomy and MG antibody status.
resultsTwenty-one MG patients (10 acetylcholine receptor (AChR) positive, eight seronegative, and three muscle-specific kinase (MuSK) positive) were identified. These patients (mean age 46.4 years, 76% female) showed significant improvement post-rituximab, with 50% achieving complete or near-complete remission (MGFA Class I). Pyridostigmine dosage decreased significantly, and CD19/CD20 levels dropped markedly. MuSK-positive patients responded most rapidly, and thymectomy did not considerably impact outcomes. Rituximab was well-tolerated, with mild infusion-related reactions in two patients.
conclusionRituximab is a safe and effective option for refractory MG, especially in MuSK-positive patients, offering a cost-effective alternative in LMICs where treatments like eculizumab are inaccessible.
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