CTICasesSmall Airway Disease in Sarcoidosis mimicking Obliterative Bronchiolitis
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Imaging findings
Thin-section CT images reveal focal areas of subtle bronchial narrowing and thickening in subsegmental bronchi, such as in the right and left upper lobes. Expiratory images confirm the presence of diffuse air trapping throughout the lungs.
Key takeaways
Differentiating small airway disease related to sarcoidosis from obliterative bronchiolitis in rheumatoid arthritis can be challenging, especially in patients with both conditions. Sarcoidosis affecting the airways tends to cause bronchial narrowing and thickening, whereas obliterative bronchiolitis typically results in bronchial dilation and air trapping. Air trapping is a common feature in both, but the pattern of airway caliber change can help distinguish them.
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