13 results
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
there are four patterns ... low attenuation (table ... The cystic pattern ... pattern on a CXR ... pattern can be
Here are the most common examples of these four patterns on a chest x-ray (click image
of these four patterns ... on a chest x-ray ... consolidation - Diffuse ... - Reticular interstitial ... Consolidation #Patterns
High Attenuation pattern (2) 
1. Non specific interstitial pneumonitis (NSIP): ground glass with traction bronchiectasis, no
High Attenuation pattern ... Non specific interstitial ... Radiology #HRCT #CTChest ... HighAttenuation #Pattern ... #Comparison #Table
Nodular pattern
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary TB: random nodules
3. Sarcoidosis: nodules with perilymphatic
Nodular pattern ... Hypersensitivity pneumonitis: ill ... Radiology #HRCT #CTChest ... #Nodular #Pattern ... #Comparison #Table
Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
pattern The algorithm ... are visible, the pattern ... the nodules are diffuse ... Pulmonary #HRCT #CTChest ... NodularPattern #Nodular #Pattern
Whenever you see an area of increased density within the lung, it must be the result
of these four patterns ... resulting in lobar, diffuse ... opacities. 2- Interstitial ... fine or coarse reticular ... Consolidation #Patterns
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
listed in the table ... have specific patterns ... realise, that these patterns ... Radiology #Pulmonary #CTChest ... IdiopathicInterstitialPneumonia #ILD
On the left some diseases with a nodular pattern.
1. Hypersensitivity pneumonitis: ill defined centrilobular nodules.
2. Miliary
with a nodular pattern ... Radiology #Pulmonary #CTChest ... #Nodular #Pattern ... #Differential #Comparison ... #Table #RadiologyAssistant
Reticular pattern 
1. Lymphangitic carcinomatosis: irregular septal thickening, usually focal or unilateral 50% adenopathy', known carcinoma.
2.
Reticular pattern ... peribronchovascular interstitium ... Radiology #HRCT #CTChest ... #Reticular #Pattern ... #Comparison #Table
Septal thickening
Thickening of the lung interstitium by fluid, fibrous tissue, or infiltration by cells results in
cells results in a pattern ... of reticular opacities ... differential diagnosis (Table ... Pulmonary #HRCT #CTChest ... #Reticular #SeptalThickening