1103 results
Cystic Lung Disease
Upper Lobe Predominant: 
Langerhans Cell Histiocytosis, Pneumocystis Jiroveci, Hypersensitivity Pneumonitis, Neurofibromatosis Type 1, Paracoccidioidomycosis,
Cystic Lung Disease ... Pneumonitis, Follicular Bronchiolitis ... , Constrictive Bronchiolitis ... nickmmark #Cystic #Lung
Lung Nodules - Differential Diagnosis by Distribution
 • Centrilobular: Hypersensitivity Pneumonitis, RB-ILD, Pneumoconiosis, Infectious Bronchiolitis, Vasculitis,
Lung Nodules - Differential ... Pneumoconiosis, Infectious Bronchiolitis ... BrighamChiefs #Lung
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
Upper lung zone ... - Respiratory bronchiolitis
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
or interstitial lung ... predominance: Respiratory bronchiolitis ... pneumonitis, Respiratory bronchiolitis
Interstitial Lung Diseases (ILD)
Exposure-Related ILD (a.k.a. extrinsic allergic alveolitis): 
 • Hypersensitivity pneumonitis, Farmer's lung, Bird
Interstitial Lung ... pneumonitis, Farmer's lung ... Bird fanciers' lung ... (coal workers' lung ... ), Respiratory bronchiolitis-interstitial
It can be difficult to distinguish these three entities.
There are two diagnostic hints for further differentiation:
-
in the 'black' lung ... to the 'white' lung ... possibilities: obstructive bronchiolitis ... and 'white' lung ... Temporary bronchiolitis
Tree-in-Bud Sign on Chest CT
 • Multiple centrilobular nodules arranged in a linear branching pattern.
 •
atypical pna, Viral bronchiolitis ... TreeInBud #Sign #CT #Lung
Here another case of hypersensitivity pneumonitis.
There is a mosaic pattern.
Some secundary lobules demonstrate ground-glass opacity due
opacity due to lung ... lucent due to bronchiolitis
Patients with CHD are exceptionally sensitive to the effects of bronchiolitis on their volume status
Four principles
the effects of bronchiolitis ... blood flow to the lungs ... CongenitalHeartDisease #Bronchiolitis
Subacute hypersensitivity pneumonitis
The key findings in the subacute hypersensitivity pneumonitis are:
ill-defined centrilobular nodules of ground-glass opacity
opacity due to lung ... lucency due to bronchiolitis