Interstitial diseases

Question 1

Nonspecific interstitial pneumonia (NSIP)

Answer 1

Bilateral ground-glass
reticular opacities ± traction bronchiectasis ± peribronchovascular fibrosis

Subpleural sparing

lack of honeycombing

lower lung predominance

fibrotic and cellular NSIP

Question 2

Usual Interstitial Pneumonia (UIP)

Answer 2

irregular reticulation/ fibrosis, traction bronchiectasis

posterior basal subpleural honeycombing

Question 3

Cryptogenic Organizing Pneumonia COP

Answer 3

mixed consolidation and GGO in peripheral and peribonchovascular distribution

Reverse halo/atoll sign (central lucency surrounded by halo opacity)

Question 4

Respiratory Bronchiolitis ILD ( RB ILD)

Answer 4

Centrilobular nodules and patchy GGO in random distribution

smokers

Question 5

Desquamative Interstitial Pneumonia (DIP)

Answer 5

basal predominant patchy or subpleural GGO more extensive than RB ILD.
May be a few cysts

smokers

Question 6

Lymphoid Interstitial Pneumonia (LIP)

Answer 6

diffuse or lower lobe predominant GGO.

scattered thin walled perivascular cysts

Question 7

Acute Interstitial Pneumonia (AIP)

Answer 7

Extensive GGO