Structures Involved

1. 1. Bronchi and Bronchioles:
      • bronchi and bronchioles,
        • peribronchovascular tissues
      • Blood vessels i
        • vasculitis
   2. Alveoli:
      •  inflammation and  then
      • fibrosis
   3. Connective Tissue:
      • inflammation and scarring.

Manifesting as

1. Peribronchovascular Involvement:
2. Ground-Glass Opacities
3. Organizing Pneumonia (OP):
4. Interstitial Lung Disease (ILD)
5. Honeycombing:
6. Pulmonary Hypertension:

 

Links and References

Wiki