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On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
Hypersensitivity ... Hypersensitivity ... Radiology #Pulmonary #CTChest ... NodularPattern #Differential
On the left a patient with ground glass pattern in a mosaic distribution.
Some lobules are involved
The differential ... diagnosis is hypersensitivity ... was typical for hypersensitivity ... Hypersensitivity ... Clinical #Radiology #CTChest
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
distribution: Hypersensitivity ... Radiology #Pulmonary #CTChest ... #GroundGlass #Differential
Chronic hypersensitivity pneumonitis (2)
The case on the left shows an inspiratory and expiratory scan: the mosaic
Chronic hypersensitivity ... the diagnosis hypersensitivity ... included in the differential ... Clinical #Radiology #CTChest ... #Chronic #Hypersensitivity
Differential diagnosis of TB.
Primary TB: Acute bacterial pneumonia
Secondary TB: Sarcoidosis, Silicosis, Pneumoconiosis
Endobronchial spread of TB: Bronchopneumonia,
Differential diagnosis ... Bronchopneumonia, Hypersensitivity ... Diagnosis #Radiology #CTChest
UIP with honeycombing (left) and chronic HP (right)
Differential diagnosis of Hypersensitivity Pneumonitis.
Subacute stage:
- RB-ILD: seen in
chronic HP (right) Differential ... diagnosis of Hypersensitivity ... Diagnosis #Radiology #CTChest
On the left a patient who is treated with cytotoxic drugs for a hematologic malignancy.
The radiographic
fibrosis in chronic hypersensitivity ... disease in the differential ... Clinical #Radiology #CTChest
On the left a smoker with RB-ILD with subtle HRCT-findings.
The dominant pattern is ground glass opacification.
Additional
there is a broad differential ... would first think hypersensitivity ... Clinical #Radiology #CTChest
High-Res Chest CT Patterns - Differential Diagnosis Framework
Reticular:
 • Septal Thickening: Lymphangitic Carcinoma, Interstitial Edema, Alveolar
High-Res Chest CT ... Patterns - Differential ... Centrilobular: Hypersensitivity ... HiRes #HighRes #Chest ... #CT #Patterns #Differential
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
Hypersensitivity ... Hypersensitivity ... Radiology #HRCT #CTChest