10 results
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
#Clinical #Diagnosis ... #Radiology #Pulmonary ... #CTChest #Nodular ... #Differential #Comparison ... #Table #RadiologyAssistant
Septic emboli
Septic emboli usually present as multiple ill-defined nodules.
In about 50% cavitation is seen.
CT demonstrates more
nodules. ... can suggest the diagnosis ... #Clinical #Radiology ... #CXR #CTChest # ... SepticEmboli #Cavity #RadiologyAssistant
Air Bronchogram Sign on Chest CT
 • Patent airways surrounded by opacified lung
 • DDx: pna,
Sign on Chest CT ... edema, severe ILD ... #CT #Lung #Pulmonary ... #diagnosis #radiology ... #clinical
Subacute hypersensitivity pneumonitis
The key findings in the subacute hypersensitivity pneumonitis are:
ill-defined centrilobular nodules of ground-glass opacity
cases) or mosaic pattern ... opacity due to lung ... #Clinical #Radiology ... #CTChest #Hypersensitivity ... Centrilobular #RadiologyAssistant
Air Crescent Sign on Chest CT
 • Crescentic or circumferential rim of radiolucent airspace within a
Air Crescent Sign ... on Chest CT • ... #CT #Lung #Pulmonary ... #diagnosis #radiology ... #clinical
Tree-in-Bud Sign on Chest CT
 • Multiple centrilobular nodules arranged in a linear branching pattern.
 •
on Chest CT • ... centrilobular nodules ... #CT #Lung #Pulmonary ... #diagnosis #radiology ... #clinical #tree
UIP with honeycombing (left) and chronic HP (right)
Differential diagnosis of Hypersensitivity Pneumonitis.
Subacute stage:
- RB-ILD: seen in
throughout the whole lung ... #Clinical #Diagnosis ... #Radiology #CTChest ... #UIP #Comparison ... #RadiologyAssistant
Chronic hypersensitivity pneumonitis (2)
The case on the left shows an inspiratory and expiratory scan: the mosaic
Signs of fibrosis ... mid and lower lung ... #Clinical #Radiology ... #CTChest #Chronic ... #Fibrosis #RadiologyAssistant
It can be difficult to distinguish these three entities.
There are two diagnostic hints for further differentiation:
-
There are two diagnostic ... gren - Post transplant ... penicillamine) #Clinical ... #Radiology #CTChest ... #RadiologyAssistant
Authors: Mark M. Ramzy, DO, EMT-P (@MarkRamzyDO, EM Resident Physician, Drexel University, Department of Emergency Medicine)
Vital signs: BP ... This patient’s clinical ... radiograph pattern ... #Radiology #CTChest ... #Lung #Pulmonary