CTICasesRheumatoid Arthritis-Associated Constrictive Bronchiolitis
Imaging findings
Inspiratory and expiratory chest CT reveals subtle mosaic attenuation on inspiration with matching lobular air trapping on expiration, particularly in non-dependent areas of the upper lobes and lingula, accompanied by preserved lung volumes and mild bronchial wall thickening.
Key takeaways
Constrictive bronchiolitis is a known, under-recognized small airways manifestation of rheumatoid arthritis. It typically presents clinically with progressive obstructive physiology on pulmonary function tests, and radiographically as mosaic perfusion with air trapping on expiratory HRCT.
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