13 results
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Low Attenuation pattern ... LCH: multiple round ... low attenuation areas ... Radiology #HRCT #CTChest ... #Table #RadiologyAssistant
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Low Attenuation pattern ... low attenuation areas ... histiocytosis (LCH ... Radiology #HRCT #CTChest ... #Table #RadiologyAssistant
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
Differential diagnosis ... in interstitial lung ... is interstitial lung ... The cystic pattern ... RadiologyAssistant
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
The fourth pattern ... cysts (LAM, LIP ... Radiology #Pulmonary #CTChest ... LowAttenuation #Differential ... Emphysema #SignetRing #RadiologyAssistant
Emphysema, when it is severe, can mimick Langerhans cell histiosytosis.
When it extends beyond the centrilobular area
look as if it is cystic ... , but also areas ... bronchiolitis and even fibrosis ... Clinical #Radiology #CTChest ... #Emphysema #RadiologyAssistant
On the left a chest film of a 19 year old patient with Langerhans cell histiocytosis.
The
is a reticular patern ... caused by multiple cysts ... Radiology #CXR #CTChest ... #LCH #LangerhansCellHistiocytosis ... #RadiologyAssistant
Ground-glass opacity
Ground-glass opacity (GGO) represents:
- Filling of the alveolar spaces with pus, edema, hemorrhage, inflammation or
or interstitial lung ... in ground glass pattern ... Radiology #Pulmonary #CTChest ... #GroundGlass #Differential ... #RadiologyAssistant
Cavities frequently arise within a mass or an area of consolidation as a result of necrosis.
We
In the differential ... the surrounding lung ... with end-stage fibrosis ... Diagnosis #Radiology #CTChest ... Emphysema #Comparison #RadiologyAssistant
On the left a patient who is treated with cytotoxic drugs for a hematologic malignancy.
The radiographic
or NSIP pattern ... consider drug-related lung ... disease in the differential ... Clinical #Radiology #CTChest ... #RadiologyAssistant
Chronic hypersensitivity pneumonitis (2)
The case on the left shows an inspiratory and expiratory scan: the mosaic
Signs of fibrosis ... mid and lower lung ... included in the differential ... Clinical #Radiology #CTChest ... #RadiologyAssistant