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There is a hydropneumothorax.
Notice the air-fluid level (blue arrow).
The upper lobe is still attached to the
lymphangioleiomyomatosis (LAM ... LAM is a rare lung ... LAM also occurs ... Lymphangioleiomyomatosis #LAM
On the left three different patients with lung cysts.
From left to right: Lymphangiomyomatosis, LIP and Langerhans
Cystic #Comparison #LAM
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
- Lung cysts (LAM
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Lymphangiomyomatosis (LAM
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Cystic LCH: - LAM
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Lymphangiomyomatosis (LAM
There is a hydropneumothorax.
Notice the air-fluid level.
The upper lobe is still attached to the chest wall
lymphangioleiomyomatosis (LAM ... LAM is a rare lung ... LAM also occurs ... Lymphangioleiomyomatosis #LAM
On the left a case with multiple cysts that are evenly distributed througout the lung (
Lymphangiomyomatosis (LAM ... Radiology #CTChest #LAM
Differential diagnosis of Lymphangiomyomatosis:
Langerhans cell histiocytosis: > 90% are smokers, cysts have irregular shapes and the
typical case of LAM ... Lymphangiomyomatosis #LAM
Pleural effusion is seen in:
1. Pulmonary edema
2. Lymphangitic spread of carcinoma - often unilateral
3. Tuberculosis
4. Lymphangiomyomatosis
Lymphangiomyomatosis (LAM