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On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
the left some diseases ... #Clinical #Diagnosis ... #Radiology #Pulmonary ... #Differential #Comparison ... #Table #RadiologyAssistant
Highlighted Conditions With Arteritis or Periarteritis of the Coronaries
Takayasu's arteritis:
 - Onset < 40 yrs
 -
- pulmonary nodules ... Retroperitoneal fibrosis ... - Perirenal fibrosis ... #Differential #Diagnosis ... #Cardiology #Table
The distribution of nodules shown on HRCT is the most important factor in making an accurate
making an accurate diagnosis ... distribution In certain diseases ... #Diagnosis #Radiology ... Perilymphatic #Comparison ... #Diagram #RadiologyAssistant
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Differential diagnosis ... Nodular LCH: - Sarcoidosis ... #Radiology #CTChest ... #Differential #Comparison ... #Table #RadiologyAssistant
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
Honeycombing Most diseases ... #Diagnosis #Radiology ... Differential #Diagram #Comparison ... Emphysema #SignetRing #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 ... #Differential #RadiologyAssistant
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
HRCT as seen in fibrosis ... (i.e. fibrosis) ... bronchiolitis #Diagnosis ... #Radiology #Pulmonary ... #Differential #RadiologyAssistant
Solid pulmonary nodules can represent various etiologies:
- benign granulomas
- focal scar
- intrapulmonary lymph nodes
- primary malignancies
-
Solid pulmonary nodules ... malignancies - metastatic disease ... Perifissural nodules ... #Diagnosis #Radiology ... PulmonaryNodule #Followup #RadiologyAssistant
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
not represent 'diseases ... combinations of fibrosis ... These diseases have ... #Diagnosis #Radiology ... ILD #Findings #RadiologyAssistant
It is very important to differentiate between acute consolidation and chronic consolidation, because it will limit
the differential diagnosis ... In chronic disease ... granulomatous noduli ... #Diagnosis #Radiology ... #Differential #RadiologyAssistant