Work

Secondary Organising Pneumonia Among Immunocompromised Multiple Sclerosis Patients Treated With Ocrelizumab Following COVID ‐19 Infection: Two Case Reports With Literature Review

Year: 2025

Type: article

Abstract: Anti-CD20 medications, such as rituximab and coronavirus disease 2019 (COVID-19) infection, have been shown to cause secondary organising pneumonia (OP). Ocrelizumab is an anti-CD20 monoclonal antibody widely used as a disease-modifying therapy for relapsing-remitting and primary progressive forms of multiple sclerosis (MS). We describe two cases of biopsy-proven secondary OP in ocrelizumab-treated MS patients occurring several weeks after contracting COVID-19 infection. These cases had been on ocrelizumab for 6.5 years (latent period) before the development of OP. Withdrawal of ocrelizumab and corticosteroids resulted in clinical and radiographic recovery. Literature review revealed seven cases of secondary OP in ocrelizumab-treated MS patients without evidence of infection and 10 MS cases with secondary OP due to COVID-19 infection in the setting of ocrelizumab treatment. Although unproven, ocrelizumab could trigger pneumotoxicity in patients when combined with COVID infection.

Source: Respirology Case Reports

DOI: 10.1002/rcr2.70268

Authors: Tarake M. Aljarod, Richard Scott Morehead

Institutions: Marshall University, West Virginia University

Language: English

Topic: Interstitial Lung Diseases and Idiopathic Pulmonary Fibrosis

Subfield: Pulmonary and Respiratory Medicine

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: gold

Estimated APC paid: $1,130