Bronchiolitis obliterans complicating bone marrow transplantation.

Area of Science:

• Medicine
• Immunology
• Pulmonology

Background:

• Bone marrow transplantation (BMT) can lead to graft-versus-host disease (GVHD), a significant complication.
• Chronic GVHD can affect various organs, including the lungs, leading to diverse clinical manifestations.

Observation:

• A 19-year-old female presented with rapidly progressive airflow obstruction 140 days post-bone marrow transplant for acute leukemia.
• Clinical symptoms included cough, rales, bronchospasm, and exertional dyspnea.
• Pulmonary function tests revealed severe airflow obstruction and hypoxemia without restrictive defects.

Findings:

• Open lung biopsy confirmed focal bronchiolitis obliterans, a specific type of obstructive lung disease.
• Despite persistent severe airflow obstruction, the patient remained clinically stable at 381 days post-transplantation.
• Chest X-ray showed mild overinflation but was otherwise unremarkable.

Implications:

• The findings suggest a direct immunologic mechanism or a viral-GVHD interaction in the pathogenesis of this respiratory syndrome.
• Increased awareness and further research are needed to understand GVHD's role in transplant-related lung disease.
• This case underscores the importance of recognizing and investigating pulmonary complications in bone marrow transplant recipients.