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Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
pattern The algorithm ... and centrilobular ... the nodules are diffuse ... Pulmonary #HRCT #CTChest ... #NodularPattern
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
with a nodular pattern ... Miliary TB: random ... before the typical cysts ... Radiology #Pulmonary #CTChest ... #NodularPattern
The distribution of nodules shown on HRCT is the most important factor in making an accurate
or random distribution ... Centrilobular distribution ... Random distribution ... Pulmonary #HRCT #NodularPattern ... Random #Centrilobular
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
Nodular pattern ... Miliary TB: random ... perilymphatic distribution ... Radiology #HRCT #CTChest ... #Nodular #Pattern
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
- Metastases: random ... : - LAM: round cysts ... ring sign'. - Centrilobular ... Diagnosis #Radiology #CTChest ... #Cystic #Cysts
Algorithm for Diagnosis of Diffuse Cystic Lung Disease (DCLD)
Round, smooth cysts with normal lung parenchyma in
Algorithm for Diagnosis ... of Diffuse Cystic ... Diffuse distribution ... pattern not consistent ... DCLD #pulmonary #Algorithm
High-Res Chest CT Patterns - Differential Diagnosis Framework
Reticular:
 • Septal Thickening: Lymphangitic Carcinoma, Interstitial Edema, Alveolar
Patterns - Differential ... Nodular: • Random ... Pneumoconiosis • Centrilobular ... Antitripsyn Def • Cysts ... #CT #Patterns #
On the left a patient with ground glass pattern in a mosaic distribution.
Some lobules are involved
with ground glass pattern ... in a mosaic distribution ... presents with centrilobular ... confluent, HRCT shows diffuse ... Clinical #Radiology #CTChest
Basic Interpretation
A structured approach to interpretation of HRCT involves the following questions:
What is the dominant HR-pattern:
reticular
nodular
high
the dominant HR-pattern ... secondary lobule (centrilobular ... perilymphatic or random ... Pulmonary #HRCT #CTChest ... Interpretation #Algorithm