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On the left three different patients with lung cysts.
From left to right: Lymphangiomyomatosis, LIP and Langerhans
patients with lung cysts ... Langerhans cell histiocytosis ... Radiology #CTChest #Cystic ... Comparison #LAM #LIP #Histiocytosis
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Langerhans cell histiocytosis ... Cystic LCH: - LAM ... : round cysts, evenly ... child-bearing age - Cystic ... #Cysts #Differential
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Langerhans cell histiocytosis ... multiple thick walled cysts ... (LAM): regular cysts ... LowAttenuation #Cystic
HRCT findings in Langerhans cell histiocytosis:
Early stage:
- Small irregular or stellate nodules in centrilobular location.
Late stage
Langerhans cell histiocytosis ... commonly seen) - Cystic ... airspaces Cysts ... Langerhans cell histiocytosis ... There are no cysts
On the left another case of Langerhans' cell histiocytosis.
It started as small noduli, which progressed over
Langerhans' cell histiocytosis ... bizarre shaped cysts ... LangerhansCellHistiocytosis #Histiocytosis ... #Cystic #RadiologyAssistant
Cystic Lung Disease
Upper Lobe Predominant: 
Langerhans Cell Histiocytosis, Pneumocystis Jiroveci, Hypersensitivity Pneumonitis, Neurofibromatosis Type 1, Paracoccidioidomycosis,
Cystic Lung Disease ... Langerhans Cell Histiocytosis ... Disease (LCDD), Cystic ... @nickmmark #Cystic
On the left radiological pathological correlation of Langerhans cell histiocytosis in respectively nodular stage and early
Langerhans cell histiocytosis ... early and late cystic ... LangerhansCellHistiocytosis #Late #Histiocytosis
Cystic versus Reticular
It can be difficult to determine whether we are dealing with a reticular pattern
Cystic versus Reticular ... Langerhans cell histiocytosis ... LCH is called a cystic ... see if this is a cystic ... #CXR #CTChest #Cystic
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
Emphysema - Lung cysts ... Langerhans cell histiocytosis ... TractionBronchiectasis #Cysts
Differential diagnosis of Lymphangiomyomatosis:
Langerhans cell histiocytosis: > 90% are smokers, cysts have irregular shapes and the
Langerhans cell histiocytosis ... 90% are smokers, cysts ... Lymphangiomyomatosis #LAM #Cystic