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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
- Lung cysts (LAM ... Honeycombing Most diseases ... #Diagnosis #Radiology ... LowAttenuation #Differential ... #SignetRing #RadiologyAssistant
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
Upper lung zone ... Smoking related diseases ... (centrilobular emphysema ... Pulmonary edema #Diagnosis ... HRCT #ChestCT #Differential
Causes of Nail Clubbing - Mnemonic 
Cyanotic Heart Disease, Cystic Fibrosis
Lung Cancer, Lung abscess 
Ulcerative Colitis
Cyanotic Heart Disease ... , Cystic Fibrosis ... Lung Cancer, Lung ... Nails #Mnemonic #Differential ... #Causes #Diagnosis
Radiographic Features of Pulmonary Diseases
 - Pneumonia
 - Atelectasis
 - Emphysema
 - Pneumothorax
 - Effusion
 -
Features of Pulmonary Diseases ... Atelectasis - Emphysema ... Radiology #Patterns #Lung ... XRay #ChestCT #Differential ... #Diagnosis
Figure 3 HRCT-LUS correlation in normal lung, pulmonary congestion, rheumatoid lung disease, idiopathic pulmonary fibrosis.
Notes: (A)
disease, idiopathic ... pulmonary fibrosis ... arrow); (E) NSIP fibrotic ... #Clinical #Diagnosis ... #HRCT #POCUS #Lung
Interstitial Lung Diseases (ILD)
Exposure-Related ILD (a.k.a. extrinsic allergic alveolitis): 
 • Hypersensitivity pneumonitis, Farmer's lung, Bird
Diseases (ILD) ... Idiopathic pulmonary fibrosis ... disease (RB-ILD ... #Diseases #ILD ... #diagnosis #differential
Nail Clubbing - Differential Diagnosis Algorithm
Bronchopulmonary Disease
 • Bronchiectasis
 • Chronic Lung Infection
 • Lung Cancer
Nail Clubbing - Differential ... Diagnosis Algorithm ... Infection • Lung ... Asbestosis • Cystic Fibrosis ... #Diagnosis #Algorithm
Upper Lobe Lung Diseases - STAR CHASERS Mnemonic

S - Silicosis
T - Tuberculosis
A - Ankylosing Spondylitis
R -
Radiation C - Cystic Fibrosis ... Centrilobular emphysema ... clearance: - Cystic Fibrosis ... #diseases #differential ... #diagnosis #mnemonic
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
or interstitial lung ... disease (i.e. fibrosis ... bronchiolitis #Diagnosis ... #GroundGlass #Differential ... #RadiologyAssistant
Consolidation is synonymous with airspace disease.
When you think of the causes of consolidation, think of 'what
with airspace disease ... Even fibrosis as ... #Diagnosis #Radiology ... Consolidation #Differential ... #RadiologyAssistant