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Chronic hypersensitivity pneumonitis

Case contributed by Melbourne Uni Radiology Masters


Increasing shortness of breath for 8 months.

Patient Data

Age: 80-year-old
Gender: Female

CT Chest - HRCT

Inspiratory and expiratory scans of the chest have been performed along the dynamic series of the chest.

Extensive changes of pulmonary fibrosis remain stable and there is mosaic attenuation in both lungs exacerbated in the expiratory film.

These appearances are stable when compared to the previous study.

No focal mass within the lungs. Mediastinal lymph nodes are numerous but within normal size limits and are likely reactive.

Case Discussion

The changes are characteristic of pulmonary fibrosis.

This patient had a long history of exposure to pigeons as a hobby, and the CT findings are in keeping with end-stage chronic hypersensitivity pneumonitis.

On HRCT,  chronic hypersensitivity pneumonitis usually has the following features:

  • established pulmonary fibrosis with honeycomb formation
  • may see ground glass opacification
  • areas of lobular air-trapping
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Case information

rID: 38919
Published: 24th Aug 2015
Last edited: 14th Aug 2019
System: Chest
Tag: rmh
Inclusion in quiz mode: Included

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