8 results
Chronic hypersensitivity pneumonitis
The key findings in chronic hypersensitivity pneumonitis are:
Mosaic pattern with areas of ground-glass atenuation
Chronic hypersensitivity ... The HRCT shows a ... mosaic pattern ... #Clinical #Radiology ... #Fibrosis #RadiologyAssistant
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
Nodular pattern ... #Clinical #Radiology ... #HRCT #CTChest ... #Comparison #Table ... #RadiologyAssistant
High Attenuation pattern 
1. Chronic eosinophilic pneumonia with peripheral areas of ground glass opacity.
2. Sarcoid end-stage
High Attenuation pattern ... Chronic eosinophilic ... #HRCT #CTChest ... #Comparison #Table ... #RadiologyAssistant
Nodular pattern(2)
1. Sarcoidosis: nodules with perilymphatic distribution, along fissures, adenopathy.
2. TB: Tree-in-bud appearance in a patient
bronchiolitis in infection ... #Clinical #Radiology ... #HRCT #CTChest ... #Comparison #Table ... #RadiologyAssistant
On the left a patient with ground glass pattern in a mosaic distribution.
Some lobules are involved
with ground glass pattern ... in a mosaic distribution ... are confluent, HRCT ... #Clinical #Radiology ... HypersenstitivityPneumonitis #RadiologyAssistant
Chronic hypersensitivity pneumonitis (2)
The case on the left shows an inspiratory and expiratory scan: the mosaic
Chronic hypersensitivity ... pattern with areas ... pattern should ... #Clinical #Radiology ... HypersensitivityPneumonitis #Fibrosis #RadiologyAssistant
UIP with honeycombing (left) and chronic HP (right)
Differential diagnosis of Hypersensitivity Pneumonitis.
Subacute stage:
- RB-ILD: seen in
Differential diagnosis of Hypersensitivity ... show very similar HRCT ... Clinical #Diagnosis #Radiology ... #CTChest #UIP #Comparison ... Fibrosis #Mimic #ILD #RadiologyAssistant
It can be difficult to distinguish these three entities.
There are two diagnostic hints for further differentiation:
-
bronchiolitis or chronic ... seen in: - (post) infection ... MosaicAttenuation #Mosaic ... #Attenuation #Comparison ... #RadiologyAssistant