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On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
Langerhans cell ... #Clinical #Diagnosis ... #Radiology #Pulmonary ... #Comparison #Table ... #RadiologyAssistant
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Differential diagnosis ... of Langerhans cell ... Nodular LCH: - Sarcoidosis ... #Radiology #CTChest ... #Comparison #Table
Perilymphatic distribution
Perilymphatic nodules are most commonly seen in sarcoidosis.
They also occur in silicosis, coal-worker's pneumoconiosis and
Perilymphatic distribution ... #Diagnosis #Radiology ... #Pulmonary #HRCT ... #Differential # ... RadiologyAssistant
Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
in number, the distribution ... #Diagnosis #Radiology ... #Pulmonary #HRCT ... #Differential # ... Algorithm #RadiologyAssistant
The distribution of nodules shown on HRCT is the most important factor in making an accurate
In most cases small ... #Diagnosis #Radiology ... #Pulmonary #HRCT ... Perilymphatic #Comparison ... #Diagram #RadiologyAssistant
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
) - Langerhans cell ... edema #Diagnosis ... #Radiology #Pulmonary ... HRCT #ChestCT #Differential ... #Table #Distribution
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
LIP, Langerhans cell ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... LowAttenuation #Differential ... #Diagram #Comparison
Diffuse consolidation
The most common cause of diffuse consolidation is pulmonary edema due to heart failure.
This is
The most common cause ... from the various causes ... heart failure like redistribution ... #Diagnosis #Radiology ... #RadiologyAssistant
Consolidation is synonymous with airspace disease.
When you think of the causes of consolidation, think of 'what
blood or tumor cells ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... Consolidation #Differential ... #RadiologyAssistant
Mediastinal Widening - Differential Diagnosis

 • Vascular: Aortic dissection, Aortic anourysm, Enlarged pulmonary arteries, Venous or
, Atelectasis, Nodule ... / mass • Masses ... Lymphoma, Germ cell ... #Diagnosis #pulmonary ... #radiology