ILD
ILD aka Diffuse Parenchymal Lung Disease
major types:
- idiopathic interstitial pneumonia (IIP)
- Interstitial Pneumonia with Autoimmune Features (IPAF)
- connective tissue disease related (CTD-ILD)
- scleroderma (can also have UIP)
- RA
- sjogren
- myositis
- drug related
- granulomatous: sarcoidosis
- others
IIP
First do HR CT scan. Types:
- UIP
- honeycombing, LL and peripheral dominant
- +- ground glass
- reticular + traction bronchiectasis
- NSIP
- no honeycombing
- ground glass
- diffused, subpleural sparing
- BR-ILD
- smoking hx
- central lobular nodules
- traction bronchiectasis
- Misc
- desquamative interstitial pneumonia (DIP)
- acute interstitial pneumonia (AIP)
- acute/subacute, rapid few months
- ARDS looking
- atoll sign or reverse halo sign
- really sick
- treat with steroids
- cryptogenic organizing pneumonia (COP)
- migratory
- consolidative ground glass
subpleural sparing:
reverse halo sign:
graph LR
id1[Diffuse Parenchymal Lung Disease]-->id2["DPLD of known cause (drugs) or association (collagen, vascular disease)"]
id1-->id3[Idiopathic interstial pneumonias]
id1-->id4[Granulomatous DPLD, eg sarcoidosis]
id1-->id5[Other forms, eg LAM, HX]
graph TB
id3[Idiopathic interstial pneumonias]-->id6[Idiopathic pulmonary fibrosis] & id7[IIP other than IPF]
id7-->id8[DIP] & id9[AIP] & id10[NSIP] & id11[Cryptogenic] & id12[LIP] & id13[respiratory bronchiolitis ILD]