Bortezomib-Induced Bronchiolitis Obliterans Organizing Pneumonia.

Introduction. Bortezomib is a proteasome inhibitor indicated for the treatment of multiple myeloma patients. The most frequent side effects are gastrointestinal and neurological. Serious pulmonary complications have been described rarely. Observation. This case involves a 74-year-old man suffering from IgG Kappa myeloma treated with bortezomib, melphalan, and dexamethasone. After administering chemotherapy, the patient developed an acute respiratory distress syndrome (ARDS). A surgical pulmonary biopsy proved the existence of bronchiolitis obliterans organizing pneumonia (BOOP) lesions. Systemic corticotherapy led to a rapid improvement in the patient's condition. Conclusion. This is the first reported histologically confirmed case of bortezomidinduced BOOP. Faced with severe respiratory symptoms in the absence of other etiologies, complications due to bortezomid treatment should be evoked and corticotherapy considered. [ABSTRACT FROM AUTHOR]