CTICasesDouble Audrey Sign (Inviscid Airway Mucus)
Imaging findings
Thin-section CT and maximum intensity projection (MIP) reconstructions demonstrate a small, round opacity within a bronchus located directly adjacent to a pulmonary arteriole, simulating a solitary pulmonary nodule on axial images but appearing as a classic "double-barreled" structure on multiplanar views.
Key takeaways
The "double Audrey" sign describes impacted mucus within a bronchus lying parallel to its companion pulmonary artery. Identifying this airway-centered relationship on thin-section CT or MIP images prevents the misinterpretation of inspissated mucus as a neoplastic pulmonary nodule.
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