Non-specific interstitial pneumonia
Progressive systemic sclerosis.
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Bibasilar symmetric ground glass opacities with reticulation and traction bronchiectasis/bronchiolectasis.
Nonspecific interstitial pneumonia (NSIP) can be idiopathic or a manifestation of collagen vascular diseases, hypersensitivity pneumonitis and drug-induced lung disease.
HRCT is the best imaging tool for characterisation and assessment of disease extent. The main CT findings are: bibasilar ground-glass opacities and reticular opacities associated with traction bronchiectasis/bronchiolectasis, sometimes with subpleural sparing.
It is important to make the distinction from usual interstitial pneumonia, because NSIP has a better prognosis.