22 results
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Nodular LCH: - Sarcoidosis ... Cystic LCH: - LAM ... Centrilobular emphysema ... Diagnosis #Radiology #CTChest ... Comparison #Table #RadiologyAssistant
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
LCH: multiple round ... Centrilobular emphysema ... low attenuation areas ... Radiology #HRCT #CTChest ... Comparison #Table #RadiologyAssistant
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Centrilobular emphysema ... low attenuation areas ... histiocytosis (LCH ... Radiology #HRCT #CTChest ... Comparison #Table #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
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
result in decreased lung ... These include: - Emphysema ... - Lung cysts (LAM ... Radiology #Pulmonary #CTChest ... #RadiologyAssistant
Cavities frequently arise within a mass or an area of consolidation as a result of necrosis.
We
the surrounding lung ... with end-stage fibrosis ... Diagnosis #Radiology #CTChest ... Emphysema #Comparison ... #RadiologyAssistant
On the left another case of Langerhans' cell histiocytosis.
It started as small noduli, which progressed over
bizarre shaped cysts ... replace normal lung ... Clinical #Radiology #CTChest ... #LCH #LangerhansCellHistiocytosis ... #RadiologyAssistant
Radiologists use many terms to describe areas of decreased density or lucencies within the lung, like
terms to describe areas ... , like cyst, cavity ... pneumatocele, emphysema ... we describe a chest ... with a thin wall Emphysema
On the left a chest film of a 19 year old patient with Langerhans cell histiocytosis.
The
caused by multiple cysts ... Emphysema however ... #LCH #LangerhansCellHistiocytosis ... Histiocytosis #Cystic ... #RadiologyAssistant
Honeycombing is defined by the presence of small cystic spaces with irregularly thickened walls composed of
walls composed of fibrous ... Honeycomb cysts ... and subpleural lung ... from paraseptal emphysema ... #Differential #RadiologyAssistant