67 results
Chronic hypersensitivity pneumonitis
The key findings in chronic hypersensitivity pneumonitis are:
Mosaic pattern with areas of ground-glass atenuation
pneumonitis The ... Mosaic pattern with areas ... atenuation and areas ... Radiology #CXR #CTChest ... Chronic #Fibrosis #RadiologyAssistant
Ill defined centrilobular nodules of ground glass density in a patient with hypersensitivity pneumonitis #Clinical #Radiology
a patient with hypersensitivity ... pneumonitis #Clinical ... #Radiology #CTChest ... #Hypersenstitivity ... Centrilobular #RadiologyAssistant
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
Hypersensitivity ... Diagnosis #Radiology #Pulmonary ... #CTChest #Nodular ... NodularPattern #Differential ... Comparison #Table #RadiologyAssistant
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
Hypersensitivity ... pneumonitis: ill ... Hypersensitivity ... Radiology #HRCT #CTChest ... Comparison #Table #RadiologyAssistant
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
histiocytosis - Hypersensitivity ... pneumonitis - Sarcoidosis ... - Aspiration - Pulmonary ... HRCT #ChestCT #Differential ... #Upper #Lower #RadiologyAssistant
This patient presented with acute dyspnoe and a normal chest film (not shown).
The HRCT at presentation
shows lobular areas ... pneumonitis. ... Clinical #Radiology #CTChest ... #Hypersensitivity ... #Resolution #RadiologyAssistant
Cystic Lung Disease
Upper Lobe Predominant: 
Langerhans Cell Histiocytosis, Pneumocystis Jiroveci, Hypersensitivity Pneumonitis, Neurofibromatosis Type 1, Paracoccidioidomycosis,
Pneumocystis Jiroveci, Hypersensitivity ... Pneumonitis, Neurofibromatosis ... (LCDD), Cystic Pulmonary ... Bronchiolitis, Pulmonary ... Lung #Disease #differential
Non-Resolving Pneumonias: Etiologies
Unusual Infections:
 - Immunocompromised patients (e.g.: Mycobacterium, Aspergillosis, Nocardia)
 - Endemic Fungi (e.g.: Histoplasmosis,
Non-Resolving Pneumonias ... - Hypersensitivity ... pneumonitis - ... Others: - Pulmonary ... #differential
High-Res Chest CT Patterns - Differential Diagnosis Framework
Reticular:
 • Septal Thickening: Lymphangitic Carcinoma, Interstitial Edema, Alveolar
Patterns - Differential ... Pneumonitis, Respiratory ... Honeycombing: Idiopathic Pulmonary ... #CT #Patterns #Differential ... #Diagnosis #pulmonary
Interstitial Lung Diseases (ILD)
Exposure-Related ILD (a.k.a. extrinsic allergic alveolitis): 
 • Hypersensitivity pneumonitis, Farmer's lung, Bird
alveolitis): • Hypersensitivity ... pneumonitis, Farmer's ... • Radiation pneumonitis ... ILD #diagnosis #differential ... #pulmonary #causes