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The fourth pattern includes abnormalities that result in decreased lung attenuation or air-filled lesions.
These include:
- Emphysema
-
on the basis of HRCT ... #Diagnosis #Radiology ... #Pulmonary #CTChest ... Differential #Diagram #Comparison ... Emphysema #SignetRing #RadiologyAssistant
Central distribution is seen in sarcoidosis and cardiogenic pulmonary edema.
Peripheral distribution is mainly seen in cryptogenic
and cardiogenic pulmonary ... #Diagnosis #Radiology ... #Pulmonary #HRCT ... Central #Peripheral #RadiologyAssistant
Upper lung zone preference is seen in:
- Inhaled particles: pneumoconiosis (silica or coal)
- Smoking related diseases
- Aspiration - Pulmonary ... edema #Diagnosis ... #Radiology #Pulmonary ... #HRCT #ChestCT ... #Upper #Lower #RadiologyAssistant
Perilymphatic distribution
Perilymphatic nodules are most commonly seen in sarcoidosis.
They also occur in silicosis, coal-worker's pneumoconiosis and
in differential diagnosis ... #Diagnosis #Radiology ... #Pulmonary #HRCT ... #Differential #RadiologyAssistant
More than 100 entities manifest as diffuse lung disease.
Fortunately only about 10 of these account for
also uncommon HRCT-presentations ... #Diagnosis #Radiology ... #Pulmonary #SHITFACED ... #Mnemonic #HRCT ... #RadiologyAssistant
Differential diagnosis of Langerhans cell histiocytosis.
Nodular LCH:
- Sarcoidosis: perilymphatic distribution.
- Metastases: random distribution.
Cystic LCH:
- LAM: round
Differential diagnosis ... : 'signet ring sign ... #Radiology #CTChest ... #Differential #Comparison ... #Table #RadiologyAssistant
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
Differential diagnosis ... on HRCT Most of ... #Diagnosis #Radiology ... #Pulmonary #CXR ... #Differential #RadiologyAssistant
The distribution of nodules shown on HRCT is the most important factor in making an accurate
nodules shown on HRCT ... #Diagnosis #Radiology ... #Pulmonary #HRCT ... Perilymphatic #Comparison ... #Diagram #RadiologyAssistant
Diffuse consolidation
The most common cause of diffuse consolidation is pulmonary edema due to heart failure.
This is
consolidation is pulmonary ... Look for other signs ... #Diagnosis #Radiology ... #Pulmonary #CXR ... #Differential #RadiologyAssistant
Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
#Diagnosis #Radiology ... #Pulmonary #HRCT ... Differential #Algorithm #RadiologyAssistant