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Main causes of diffuse parenchymal lung diseases.

#differential #algorithm #diagnosis #causes #DPLD #ILD #parenchymal #lung #diseases #pulmonary
parenchymal lung diseases ... #differential #algorithm ... parenchymal #lung #diseases ... #pulmonary #respiratory
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
Honeycombing Most diseases ... Diagnosis #Radiology #Pulmonary ... #CTChest #LowAttenuation ... #Differential # ... Diagram #Comparison
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
the left some diseases ... Respiratory bronchiolitis ... #CTChest #Nodular ... NodularPattern #Differential ... #Comparison #Table
Clues to Differential Diagnosis of Central Cyanosis: Onset of cyanosis, Clubbing, Secondary erythrocytosis, Auscultation, X-ray, Echocardiography,
Clues to Differential ... heart defect - Pulmonary ... diseases - Pulmonary ... #Cyanosis #Differential ... Causes #Table #Comparison
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
Smoking related diseases ... centrilobular emphysema - Respiratory ... - Aspiration - Pulmonary ... Diagnosis #Radiology #Pulmonary ... HRCT #ChestCT #Differential
Interstitial Lung Diseases (ILD)
Exposure-Related ILD (a.k.a. extrinsic allergic alveolitis): 
 • Hypersensitivity pneumonitis, Farmer's lung, Bird
• Idiopathic pulmonary ... pneumonia (COP), Respiratory ... Acute, Chronic • Pulmonary ... ILD #diagnosis #differential ... #pulmonary #causes
Connective tissue disease-associated interstitial lung diseases

LIP: lymphoid interstitial pneumonia. NSIP: nonspecific interstitial pneumonia. OP: organizing pneumonia.
Connective tissue disease-associated ... interstitial lung diseases ... CTILD #Diagnosis #Differential ... #Comparison #Table ... #Pulmonary #Rheumatology
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
result of air space disease ... interstitial lung disease ... Diagnosis #Radiology #Pulmonary ... #CTChest #GGO # ... #GroundGlass #Differential
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
Hypoventilation: CNS of Respiratory ... Obstructive Lung Disease ... , Interstitial Disease ... Interstitial Lung Disease ... Hypoxia #hypoxemia #differential
Causes of Hypoxemia- Differential Diagnosis Algorithm
Ventilation/perfusion Mismatch
 • Airway Disease (Asthma, COPD)
 • Vascular (PE*)
 •
of Hypoxemia- Differential ... Mismatch • Airway Disease ... • Parenchymal Disease ... Abnormalities • Chest ... Hypoxemia #Hypoxia #Differential