Rituximab may cause higher mortality in young autoimmune disease patients with rituximab-induced interstitial lung disease: A case report and systematic review of the literature

Background: MOG-IgG-associated encephalomyelitis (MOG-EM), a of common type of autoimmune encephalomyelitis (AE), is an autoimmune disease (AID) of the central nervous system that predominantly affects the brain and spinal cord. Rituximab (RTX) - a chimeric anti-CD20 monoclonal antibody - has been increasingly used as an effective immunotherapeutic agent in the treatment of AE. However. interstitial lung disease (ILD) is an exceedingly rare but potentially fatal complication of RTX treatment. Case report and review of the literature: Herein, we describe the first case of RTX-induced ILD (R-ILD) in a teenager with MOG-EM. In addition, we systematically review the literature on R-ILD cases in patients with AID and discuss the clinical characteristics of R-ILD in individuals with differential diagnosis of AID. Conclusion: R-ILD should be suspected in patients with AE undergoing RTX treatment who present with dyspnea and/or cough without any signs or symptoms of infection. Meanwhile, by reviewing the literature systematically, we suggest that regardless of the dosage. RTX therapy for Al]) should be very cautious and well-monitored especially in young individuals including age groups of children, adolescents, and young adults due to the possibility of relatively higher mortality caused by R-ILD.