CTICasesLymphoid Interstitial Pneumonia
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Imaging findings
Chest radiograph demonstrates subtle reticular opacities predominantly affecting the lower lung zones. High-resolution chest CT shows numerous small pulmonary nodules and multiple thin-walled perivascular lung cysts, which are most numerous and prominent in the lower lobes. Pathological biopsy confirmed the diagnosis.
Key takeaways
Lymphoid interstitial pneumonia is a rare interstitial lung disease closely associated with autoimmune disorders, particularly Sjögren's syndrome. The characteristic CT finding of thin-walled perivascular cysts and centrilobular nodules in a lower-lung predominant distribution should prompt evaluation for connective tissue disease.
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