CTICasesPulmonary Meningothelial-like Nodules
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Imaging findings
High-resolution chest CT shows multiple, tiny, bilateral pulmonary nodules distributed along the distal branches of the pulmonary vessels. Many of these small nodules exhibit a characteristic central lucency.
Key takeaways
Minute meningothelial-like nodules (MMNs), also known as meningotheliomatosis, are small, benign, interstitial cell nests commonly found incidentally on pathology but rarely large or numerous enough to be detected on chest CT. When visible on high-resolution imaging, they can mimic hematogenous metastases, and biopsy or resection may be required to confirm their benign nature.
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