19 results
Low Attenuation pattern 
1. Lymphangiomyomatosis (LAM): uniform cysts in woman of child-bearing age; no history of
Low Attenuation pattern ... Lymphangiomyomatosis (LAM ... ): uniform cysts ... bizarre shaped cysts ... Radiology #HRCT #CTChest
Low Attenuation pattern (2) 
1. Centrilobular emphysema: low attenuation areas without walls. Notice the centrilobular artery
Low Attenuation pattern ... multiple thick walled cysts ... Lymphangiomyomatosis (LAM ... ): regular cysts ... Radiology #HRCT #CTChest
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Cystic LCH: - LAM ... : round cysts, evenly ... child-bearing age - Cystic ... Diagnosis #Radiology #CTChest ... #Cystic #Cysts
The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
The fourth pattern ... Emphysema - Lung cysts ... (LAM, LIP, Langerhans ... Radiology #Pulmonary #CTChest ... TractionBronchiectasis #Cysts
On the left three different patients with lung cysts.
From left to right: Lymphangiomyomatosis, LIP and Langerhans
patients with lung cysts ... Diagnosis #Radiology #CTChest ... #Cystic #Comparison ... #LAM #LIP #Histiocytosis
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
On a Chest X-Ray ... detected on a chest ... The cystic pattern ... When the cysts have ... seen and in many cases
Algorithm for Diagnosis of Diffuse Cystic Lung Disease (DCLD)
Round, smooth cysts with normal lung parenchyma in
Round, smooth cysts ... distribution - LAM ... Bizarre/irregular cysts ... - PLCH Round cysts ... pattern not consistent
Nodular pattern(2)
1. Sarcoidosis: nodules with perilymphatic distribution, along fissures, adenopathy.
2. TB: Tree-in-bud appearance in a patient
Nodular pattern( ... before the typical cysts ... Radiology #HRCT #CTChest ... #Nodular #Pattern
Key findings in Lymphangiomyomatosis:
Numerous thin-walled cysts, surrounded by normal parenchyma.
Cysts range from 2mm to 5cm in
Numerous thin-walled cysts ... Cysts range from ... Cysts are distributed ... thickness of the cysts ... Clinical #Radiology #CTChest
High-Res Chest CT Patterns - Differential Diagnosis Framework
Reticular:
 • Septal Thickening: Lymphangitic Carcinoma, Interstitial Edema, Alveolar
High-Res Chest CT ... Patterns - Differential ... Antitripsyn Def • Cysts ... Infection, Aspiration, Cystic ... #CT #Patterns #