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Mediastinal masses are discussed in more detail in Mediastinal masses.
Here is just a brief overview. #Diagnosis
Mediastinal masses ... masses. ... #Diagnosis #Radiology ... #Differential #Table ... Middle #Posterior #RadiologyAssistant
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Lymphangiomyomatosis (LAM ... #Clinical #Radiology ... Pattern #Comparison #Table ... #RadiologyAssistant
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Cystic LCH: - LAM ... central dot. - LIP #Clinical ... #Diagnosis #Radiology ... Differential #Comparison #Table ... #RadiologyAssistant
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Lymphangiomyomatosis (LAM ... #Clinical #Radiology ... Pattern #Comparison #Table ... #RadiologyAssistant
The table on the left is the overall table for mediastinal masses.
In the next paragraphs we
The table on the ... for mediastinal ... Diagnosis #Pulmonary #Radiology ... #Mediastinal #Mass ... Middle #Posterior #RadiologyAssistant
Azygoesophageal recess
The most important mediastinal line to look for is the azygoesophageal line, which borders the
most important mediastinal ... The causes of displacement ... summarized in the table ... #Diagnosis #Radiology ... #Differential #RadiologyAssistant
The azygoesophageal recess is the region inferior to the level of the azygos vein arch in
interface with the mediastinum ... azygoesophageal line is caused ... Bronchogenic cyst #Clinical ... #Anatomy #Radiology ... Azygoesophageal #Recess #RadiologyAssistant
Sarcoidosis
On a CXR sarcoidosis usually first presents with hilar and mediastinal lymphadenopathy (example).
Parenchymal disease can present
with hilar and mediastinal ... consolidation or even as masses ... Here a typical case ... #Clinical #Radiology ... #Sarcoidosis #RadiologyAssistant
Key findings in Lymphangiomyomatosis:
Numerous thin-walled cysts, surrounded by normal parenchyma.
Cysts range from 2mm to 5cm in
Mediastinal or hilar ... left a typical case ... of LAM with multiple ... #Clinical #Radiology ... #Cystic #RadiologyAssistant
Notice that there are multiple densities in both lungs.
The larger ones are ill-defined and maybe there
multiple ill-defined masses ... The lab-findings ... #Clinical #Radiology ... OrganizingPneumonia #BOOP #RadiologyAssistant