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Abstract
Organizing pneumonia (OP) is a known non-infectious pulmonary complication following allogeneic hematopoietic cell transplant (HCT) and represents a significant risk factor for non-relapse mortality in HCT recipients. Unlike bronchiolitis obliterans syndrome, it is not universally acknowledged as a distinctive pulmonary manifestation of chronic-graft-versus-host disease (cGVHD) and therefore, its diagnostic criteria and management approach is lacking. Given it shared similar clinical features, radiological and histological findings to OP in non-HCT population, the diagnostic approach and treatment strategy for OP in HCT recipient is largely adapted from the non-HCT population. In this paper, we aim to enhance the understanding of OP within the context of cGVHD following HCT, distinguish its clinical features and treatment strategy from non-HCT counterpart, thereby reinforcing its recognition as a pulmonary manifestation of GVHD. We will propose the diagnostic criteria and outline our approach in diagnosis and treatment strategy, highlighting the potential challenges that may arise in each process. Finally, we will discuss knowledge gaps in this field and identify the area of need for future research.
View details for DOI 10.1182/blood.2023023249
View details for PubMedID 38864640