47 results
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Cystic LCH: - LAM ... bronchiectasis: ... Clinical #Diagnosis #Radiology ... #Comparison #Table ... #RadiologyAssistant
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
(LAM): uniform cysts ... bizarre shaped cysts ... #Clinical #Radiology ... Pattern #Comparison #Table ... #RadiologyAssistant
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
(LAM): regular cysts ... #Clinical #Radiology ... LowAttenuation #Cystic ... Pattern #Comparison #Table ... #RadiologyAssistant
Bronchiectasis is defined as localized bronchial dilatation.
The diagnosis of bronchiectasis is usually based on a combination
Bronchiectasis is ... The most common cause ... bronchitis, COPD and cystic ... #Diagnosis #Radiology ... #Differential #RadiologyAssistant
Notice the cavitation especially on the right.
In the left upper lobe there is probably some traction-bronchiectasis
some traction-bronchiectasis ... #Clinical #Radiology ... Tuberculosis #TB #Active ... TractionBronchiectasis #RadiologyAssistant
Mucoid impaction
Mucus plugs or mucoid impaction can mimick the appearance of lung nodules or a mass.
Sometimes
patients with bronchiectasis ... , as in cystic fibrosis ... bronchial obstruction caused ... #Clinical #Radiology ... Mucus #Plugging #RadiologyAssistant
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
Emphysema - Lung cysts ... histiocytosis) - Bronchiectasis ... #Diagnosis #Radiology ... TractionBronchiectasis #Cysts ... Emphysema #SignetRing #RadiologyAssistant
Nodular pattern(2)
1. Sarcoidosis: nodules with perilymphatic distribution, along fissures, adenopathy.
2. TB: Tree-in-bud appearance in a patient
a patient with active ... before the typical cysts ... #Clinical #Radiology ... Pattern #Comparison #Table ... #RadiologyAssistant
High Attenuation pattern (2) 
1. Non specific interstitial pneumonitis (NSIP): ground glass with traction bronchiectasis, no
with traction bronchiectasis ... #Clinical #Radiology ... Pattern #Comparison #Table ... #RadiologyAssistant
Mediastinal masses are discussed in more detail in Mediastinal masses.
Here is just a brief overview. #Diagnosis
Mediastinal masses ... in Mediastinal masses ... #Diagnosis #Radiology ... #Differential #Table ... Middle #Posterior #RadiologyAssistant