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Here are the most common examples of these four patterns on a chest x-ray (click image
on a chest x-ray ... consolidation - Diffuse ... - Reticular interstitial ... mass - Solitary Pulmonary ... Nodule - Multiple Masses
Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
low attenuation (table ... On a Chest X-Ray ... is reticular. ... seen and in many cases ... Diagnosis #Radiology #Pulmonary
Algorithm for nodular pattern
The algorithm to distinguish perilymphatic, random and centrilobular nodules is the following:
- Look
pattern The algorithm ... bronchovascular interstitium ... the nodules are diffuse ... #HRCT #CTChest ... #NodularPattern
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 edema ... #HRCT #CTChest
UIP
UIP is a histologic pattern of pulmonary fibrosis.
On a chest X-ray UIP manifests as a reticular
of pulmonary fibrosis ... On a chest X-ray ... manifests as a reticular ... Here a CXR with a reticular ... #Interstitial #
Causes of Chronic Dyspnea - Differential Diagnosis Algorithm
Pericardial
 • Effusion
 • Cardiac Tamponade*
 • Constriction
Myocardial
 •
Differential Diagnosis Algorithm ... Artery Disease • Stable ... Chest Wall Abnormalities ... Interstitium ... #Causes
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
indicates unknown cause ... listed in the table ... have specific patterns ... Diagnosis #Radiology #Pulmonary ... #CTChest #Idiopathic
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
Amiodarone Induced Lung Toxicity Summary

Who?
• 5% of patients
• Dose ≥ 400 mg per day

How?  Possible
(e.g., chronic interstitial ... • Patchy or diffuse ... glass opacities • Reticular ... Exclude other causes ... ground glass or reticular