Mosaic attenuation pattern

Case contributed by Bruno Di Muzio
Diagnosis certain

Presentation

History of bronchiolitis.

Patient Data

Age: 55 years
Gender: Female

CT Chest

ct
This study is a stack
Axial lung
expiratory
This study is a stack
Coronal
lung window
This study is a stack
Axial lung
window
Coronal
lung window
Axial lung
window
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Info

Mosaic attenuation pattern that is accentuated after the expiration associated with peripheral tree-in-bud pattern micro-nodules suggesting peripheral mucoid impaction.

Case Discussion

The findings are non-specific but in keeping with constrictive bronchiolitis.

A mosaic attenuation pattern is a patchwork of regions of differing attenuation seen on CT scans.

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