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Updated: Feb 18, 2026

Determination of the Relative Potency of an Anti-TNF Monoclonal Antibody mAb by Neutralizing TNF Using an In Vitro Bioanalytical Method
Published on: September 16, 2017
Three cases of anti-TNF induced myositis and literature review
Orhan Zengin1, Mustafa Erkut Onder1, Samet Alkan2
1Gaziantep University, School of Medicine, Department of Rheumatology, Gaziantep, Turkey.
Abstract:
Anti-tumor necrosis factor drugs are frequently preferred in the treatment of rheumatologic diseases and other inflammatory diseases. The development of myositis after using anti-tumor necrosis factor drugs is a rare clinical condition. Here we aimed to report cases who developed myositis after using anti-tumor necrosis factor drugs and review the current literature. We report two cases of rheumatoid arthritis and a case of ankylosing spondylitis developed idiopathic inflammatory myopathy following anti-tumor necrosis factor therapy. In conclusion, myositis could develop during anti-tumor necrosis factor therapy, so these patients should be evaluated carefully initially for myositis and should be closely monitored due to the potential for developing myositis in treatment process.
Insights
Anti-tumor necrosis factor (TNF) drugs can rarely cause myositis, a muscle inflammation condition. Patients undergoing TNF inhibitor therapy for inflammatory diseases require careful monitoring for this rare side effect.
Area of Science:
- Rheumatology
- Immunology
- Neurology
Background:
- Anti-tumor necrosis factor (TNF) drugs are mainstays in treating inflammatory and rheumatologic diseases.
- Myositis is a rare but serious adverse event associated with anti-TNF therapy.
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