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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 ... left to right: Lymphangiomyomatosis ... #Clinical #Diagnosis ... #Radiology #CTChest ... Cystic #Comparison #LAM
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Lymphangiomyomatosis ... (LAM): uniform ... cysts in woman of ... bizarre shaped cysts ... #HRCT #CTChest
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
multiple thick walled cysts ... Lymphangiomyomatosis ... (LAM): regular ... cysts in woman of ... #HRCT #CTChest
On the left a case with multiple cysts that are evenly distributed througout the lung (
On the left a case ... with multiple cysts ... (LAM). ... #Clinical #Radiology ... #CTChest #LAM #
Key findings in Lymphangiomyomatosis:
Numerous thin-walled cysts, surrounded by normal parenchyma.
Cysts range from 2mm to 5cm in
Key findings in Lymphangiomyomatosis ... left a typical case ... of LAM with multiple ... #Clinical #Radiology ... #CTChest #Lymphangiomyomatosis
Differential diagnosis of Lymphangiomyomatosis:
Langerhans cell histiocytosis: > 90% are smokers, cysts have irregular shapes and the
Differential diagnosis ... 90% are smokers, cysts ... another typical case ... #Clinical #Radiology ... #CTChest #Lymphangiomyomatosis
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
Emphysema - Lung cysts ... (LAM, LIP, Langerhans ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... TractionBronchiectasis #Cysts
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Differential diagnosis ... Cystic LCH: - LAM ... : round cysts, evenly ... #Radiology #CTChest ... #Cystic #Cysts
There is a hydropneumothorax.
Notice the air-fluid level (blue arrow).
The upper lobe is still attached to the
attached to the chest ... There is a lung cyst ... is a possible diagnosis ... leading to pulmonary cyst ... #Clinical #Radiology
Radiologists use many terms to describe areas of decreased density or lucencies within the lung, like
the lung, like cyst ... since in many cases ... we describe a chest ... Lung #Pulmonary #Diagnosis ... #Radiology