Keywords

Describe the classic CXR appearance of acute interstitial pneumonia [3].

Diffuse heterogeneous opacities.

Describe the classic CT appearance of acute interstitial pneumonia [3].

Extensive symmetric ground-glass opacities associated with traction bronchiectasis.

Which imaging modality is preferred for characterizing diffuse pulmonary disease? [3]

CT.

What is a key radiologic difference between acute interstitial pneumonia and desquamative interstitial pneumonia? [4]

DIP does not have traction bronchiectasis.

Bilateral, lower zone-predominant ground-glass opacities ± subpleural intralobular lines are suggestive of which type of interstitial pneumonia? [5]

Desquamative interstitial pneumonia.

What are the common demographics for desquamative interstitial pneumonia? [5]

Smokers; M:F, 2:1; age, 40–60.

Bilateral, diffuse, ground-glass opacities in an immunocompromised patient suggests which pathogen? [1,2,3]

Pneumocystis jirovecii.

What is the best imaging modality for pneumocystis pneumonia? [6]

HRCT.

What is the best diagnostic clue on CT for lymphoid interstitial pneumonia?

Ground-glass opacities ± pulmonary cysts.

What is seen on CXR of lymphoid interstitial pneumonia?

Basilar reticular/reticulonodular opacities.