CTICasesMinute Pulmonary Meningothelial-like Nodules
Imaging findings
CT chest shows multiple tiny, stable centrilobular nodules. High-resolution CT shows some nodules forming a ring around the small airways (cheerio sign). Pathology of the biopsied lung shows nests of meningothelial-like cells in the interstitium.
Key takeaways
Minute pulmonary meningothelial-like nodules (MPMNs) are tiny, benign interstitial lesions. On HRCT, they can exhibit a 'cheerio sign' due to their growth around small airways. They are typically stable, benign, and require no intervention or follow-up when priors confirm stability.
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