25 results
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
bronchiolitis (RB-ILD ... Hypersensitivity pneumonitis ... HRCT #ChestCT #Differential ... #Table #Distribution ... #Upper #Lower #RadiologyAssistant
Lung Nodules - Differential Diagnosis by Distribution
 • Centrilobular: Hypersensitivity Pneumonitis, RB-ILD, Pneumoconiosis, Infectious Bronchiolitis, Vasculitis,
Lung Nodules - Differential ... Diagnosis by Distribution ... Hypersensitivity Pneumonitis ... , RB-ILD, Pneumoconiosis ... , Infectious Bronchiolitis
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
Hypersensitivity pneumonitis ... : ill defined centrilobular ... perilymphatic distribution ... Pattern #Comparison #Table ... #RadiologyAssistant
Central distribution is seen in sarcoidosis and cardiogenic pulmonary edema.
Peripheral distribution is mainly seen in cryptogenic
Central distribution ... pneumonia (COP), chronic ... HRCT #ChestCT #Differential ... #Table #Distribution ... Central #Peripheral #RadiologyAssistant
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
Hypersensitivity pneumonitis ... perilymphatic distribution ... NodularPattern #Differential ... #Comparison #Table ... #RadiologyAssistant
Cough - Diagnostic Schema

Infectious: URTI, LRTI, Bacterial, Viral
Irritant/Exposure: Allergic, Post-infectious, Pneumonitis, ACEi, PTX, Foreign Body
Airway Disease:
, Pneumonitis, ACEi ... Autoimmune Vasculitis, ILD ... Schema #Acute #Chronic ... #Differential # ... Algorithm
Batwing
A bilateral perihilar distribution of consolidation is also called a Batwing distribution.
The sparing of the periphery
bilateral perihilar distribution ... it is seen in pneumonias ... frequently seen in chronic ... #CXR #Batwing #Differential ... #RadiologyAssistant
Differential diagnosis
The table summarizes the most common diseases, that present with consolidation.
Chronic diseases are indicated in
Differential diagnosis ... The table summarizes ... Chronic diseases ... the pattern of distribution ... #Table #RadiologyAssistant
UIP with honeycombing (left) and chronic HP (right)
Differential diagnosis of Hypersensitivity Pneumonitis.
Subacute stage:
- RB-ILD: seen in
HP (right) Differential ... Hypersensitivity Pneumonitis ... Subacute stage: - RB-ILD ... strong lower zone distribution ... #RadiologyAssistant
Notice that there are multiple densities in both lungs.
The larger ones are ill-defined and maybe there
is a peripheral distribution ... month history of chronic ... dealing with the differential ... diagnosis of chronic ... OrganizingPneumonia #BOOP #RadiologyAssistant