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Methimazole-Induced Pauci-Immune Glomerulonephritis and Anti-Phospholipid Syndrome: An Important Association to Be
Huzaif Qaisar1, Mohammad A Hossain1, Monika Akula1
1Department of Medicine, Jersey Shore University Medical Center, Hackensack Meridian Health, Neptune, NJ 07753, USA.
Abstract:
While methimazole (MMI) is the first line treatment for hyperthyroidism, this medication is not devoid of adverse effects. In this article, we present a 70-year-old male who admitted the hospital with right lower extremity pain and rash. The patient was recently treated with MMI for hyperthyroidism. Imaging studies revealed bilateral renal and splenic infarcts along with thrombosis of popliteal artery. Laboratory data revealed hematuria and proteinuria with positive (MPO), anti-proteinase-3 (PR3) and anti-cardiolipin IgG antibodies. Renal biopsy revealed pauci-immune glomerulonephritis and features with anti-phospholipid antibody syndrome (APS). MMI was discontinued and the patient was treated successfully with steroid therapy and anti-coagulation with resolution of proteinuria, hematuria and normalization of laboratory parameters. While MMI-induced pauci-immune glomerulonephritis has been previously reported, its association with APS has never been described before. Our case demonstrates that this rare diagnosis can be treated by early withdrawal of MMI and initiation of steroids along with anticoagulation.
Insights
Methimazole (MMI) can cause rare adverse effects like kidney and artery issues. Early MMI withdrawal and treatment with steroids and anticoagulation resolved these severe symptoms.
Area of Science:
- Nephrology
- Rheumatology
- Endocrinology
Background:
- Methimazole (MMI) is a primary treatment for hyperthyroidism.
- MMI use is associated with potential adverse effects.
- Pauci-immune glomerulonephritis is a known MMI-induced complication.
Observation:
- A 70-year-old male presented with leg pain, rash, renal, and splenic infarcts.
- The patient had hematuria, proteinuria, and positive MPO, PR3, and anti-cardiolipin antibodies.
- Renal biopsy showed pauci-immune glomerulonephritis and features of anti-phospholipid antibody syndrome (APS).
Findings:
- This case highlights a novel association between MMI-induced pauci-immune glomerulonephritis and APS.
- Discontinuation of MMI was crucial for patient recovery.
- Successful treatment involved steroids and anticoagulation, resolving renal and vascular complications.
Implications:
- Early recognition and MMI withdrawal are vital in managing this rare MMI-induced condition.
- The findings suggest a potential link between MMI, autoimmunity, and thrombotic events.
- This case expands the understanding of MMI's complex adverse effect profile and treatment strategies.
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