Mosaic attenuation pattern

Case contributed by Bruno Di Muzio


History of bronchiolitis.

Patient Data

Age: 55 years
Gender: Female

CT Chest


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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