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Obinutuzumab-Induced Inflammatory Bowel Disease-Like Pancolitis: A First Case Report

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Summary:Abstract Introduction: Obinutuzumab is a type II anti-CD20 monoclonal antibody associated with a higher rate of toxicity when compared to rituximab. Gastrointestinal side-effects have been reported but data is still sparse. Case Presentation: A 47-year-old female with medical history of stage IV follicular non-Hodgkin lymphoma under chemotherapy presented with chronic bloody diarrhea and iron deficiency anemia. Endoscopic and histologic features resembled inflammatory bowel dis-ease (IBD), imposing a thorough differential diagnosis. The diagnosis of obinutuzumab-induced pancolitis was made and the drug was suspended with subsequent clinical improvement. Conclusion: This is the first case report of obinutuzumab-induced pancolitis. The challenging differential diagnosis of IBD required a multi-disciplinary approach with subsequent outcome and management implications.
Main Authors:Mendes,Raquel R.
Other Authors:Figueiredo,Pedro C.; Andrade,Isabel
Subject:Obinutuzumab Colitis Inflammatory bowel disease
Year:2024
Country:Portugal
Document type:report
Access type:open access
Associated institution:Fundação para a Ciência e Tecnologia
Language:English
Origin:SciELO Portugal
Description
Summary:Abstract Introduction: Obinutuzumab is a type II anti-CD20 monoclonal antibody associated with a higher rate of toxicity when compared to rituximab. Gastrointestinal side-effects have been reported but data is still sparse. Case Presentation: A 47-year-old female with medical history of stage IV follicular non-Hodgkin lymphoma under chemotherapy presented with chronic bloody diarrhea and iron deficiency anemia. Endoscopic and histologic features resembled inflammatory bowel dis-ease (IBD), imposing a thorough differential diagnosis. The diagnosis of obinutuzumab-induced pancolitis was made and the drug was suspended with subsequent clinical improvement. Conclusion: This is the first case report of obinutuzumab-induced pancolitis. The challenging differential diagnosis of IBD required a multi-disciplinary approach with subsequent outcome and management implications.