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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
histiocytosis) - Bronchiectasis ... Honeycombing Most diseases ... Diagnosis #Radiology #Pulmonary ... LowAttenuation #Differential ... Emphysema #SignetRing #RadiologyAssistant
Bronchiectasis is defined as localized bronchial dilatation.
The diagnosis of bronchiectasis is usually based on a combination
thickening - lack of normal ... the peripheral lung ... Diagnosis #Radiology #Pulmonary ... #Differential # ... RadiologyAssistant
Figure 3 HRCT-LUS correlation in normal lung, pulmonary congestion, rheumatoid lung disease, idiopathic pulmonary fibrosis.
Notes: (A)
lung, pulmonary ... disease, idiopathic ... opacities and traction bronchiectasis ... artifact); (G) UIP pattern ... abnormalities, traction bronchiectasis
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
Differential diagnosis ... in interstitial lung ... disease comes from ... Diagnosis #Radiology #Pulmonary ... RadiologyAssistant
Hilar and mediastinal lymphadenopathy
In sarcoidosis the common pattern is right paratracheal and bilateral hilar adenopathy ('1-2-3-sign').
In
sarcoidosis the common pattern ... adenopathy ('1-2-3-sign ... In lung carcinoma ... Lymphadenopathy #Differential ... #RadiologyAssistant
Diffuse consolidation
The most common cause of diffuse consolidation is pulmonary edema due to heart failure.
This is
cardiogenic edema, to differentiate ... Look for other signs ... may still have a normal ... chronic heart disease ... #RadiologyAssistant
Clinical Classification of Pulmonary Hypertension

1. Pulmonary arterial hypertension from pulmonary vasculopathy
Idiopathic pulmonary arterial hypertension
Heritable gene mutations
infection - Portal ... due to lung disease ... lung disease Other ... and obstructive pattern ... Classification #Diagnosis #Differential
Bronchiectasis - Summary

What?
• Bronchiectasis is derived from the Greek words bronckos meaning airway and ectasis meaning
Nasal polyps and signs ... , in advanced disease ... in the adjacent lung ... of the affected lung ... #pulmonary #differential
Fever Patterns - Differential Diagnosis Framework

Continuous Fever:
Temp > 38°C with only 1 degree fluctuation in 24
Differential Diagnosis ... resolution falling to normal ... Brucellosis Faget's Sign ... Brucellosis • Liver or lung ... #Differential #
Hemoptysis - Differential Diagnosis Framework
Massive Hemoptysis: >150-300 mL in 24h
Airway disease: 
 • Bronchitis, Bronchiectasis, Malignancy
Hemoptysis - Differential ... in 24h Airway disease ... • Bronchitis, Bronchiectasis ... PNA, Abscess), Viral ... #Diagnosis #pulmonary