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Differential diagnosis on HRCT
Most of our knowledge about imaging findings in interstitial lung disease comes from
about imaging findings ... there are four patterns ... low attenuation (table ... The ground-glass ... Diagnosis #Radiology #Pulmonary
The idiopathic interstitial pneumonias (IIPs) comprise a heterogenous group of disorders. 
They represent fundamental responses of
a heterogenous group ... listed in the table ... have specific patterns ... realise, that these patterns ... Diagnosis #Radiology #Pulmonary
Reticular pattern 
1. Lymphangitic carcinomatosis: irregular septal thickening, usually focal or unilateral 50% adenopathy', known carcinoma.
2.
Reticular pattern ... edema: incidental finding ... peribronchovascular interstitium ... CTChest #Reticular #Pattern ... #Comparison #Table
Figure 3 HRCT-LUS correlation in normal lung, pulmonary congestion, rheumatoid lung disease, idiopathic pulmonary fibrosis.
Notes: (A)
with extensive ground ... with extensive ground ... artifact); (G) UIP pattern ... #Correlation #Table ... #ILD #Findings
Septal thickening
Thickening of the lung interstitium by fluid, fibrous tissue, or infiltration by cells results in
cells results in a pattern ... a predominant finding ... differential diagnosis (Table ... pulmonary edema ... Diagnosis #Radiology #Pulmonary
On the left a patient who is treated with cytotoxic drugs for a hematologic malignancy.
The radiographic
The radiographic findings ... are areas of ground ... like idiopathic pulmonary ... patients with a UIP pattern ... or NSIP pattern
Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
inflammatory lesions-interstitial ... discrepancies Findings ... - (C-ANCA) pattern ... - (P-ANCA) pattern ... #rheumatology #classification
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 ... high attenuation (ground-glass ... there additional findings ... Diagnosis #Radiology #Pulmonary ... Interpretation #Algorithm