Recognizing Features of ILD on HRCT

Question 1:

Subpleural Cysts on HRCT, Other Etiology

Images courtesy of and used with permission from Jonathan Goldin, MD, PhD.

In the above images, please identify which demonstrates honeycomb cysts typical of usual interstitial pneumonia (UIP) vs subpleural cysts of another etiology.

A Left, honeycomb cysts; Right, lung cysts of another etiology

B Left, lung cysts of another etiology; Right, honeycomb cysts

Correct! The image to the left represents subpleural cysts of another etiology. The image to the right demonstrates subpleural honeycomb cysts typical of usual interstitial pneumonia.

Incorrect! The image to the left represents subpleural cysts of another etiology. The image to the right demonstrates subpleural honeycomb cysts typical of usual interstitial pneumonia.

Question 2:

Air trapping is best identified on scans.

A Inspiratory

B Expiratory

Correct! It is often helpful to obtain expiratory scans in additional to traditional inspiratory scans to identify air trapping.

Incorrect! Air trapping is most easily identified on expiratory scans, not inspiratory scans.

Question 3:

Image courtesy of and used with permission from Sudhakar Pipavath, MD.

The term that describes the highlighted region above is:

A Honeycombing

B Consolidation

C Reticulation

D Traction bronchiectasis

E Air trapping

Correct! This highlighted region of this image clearly demonstrates traction bronchiectasis, resulting from fibrotic tissue “pulling” on the bronchi.

Incorrect! This highlighted region of this image demonstrates traction bronchiectasis, resulting from fibrotic tissue “pulling” on the bronchi.

Updated International Guidelines for IPF Diagnosis: A Radiology Perspective

Quiz: Recognizing Features of ILD on HRCT