CTICasesDiffuse Pulmonary Meningotheliomatosis
Imaging findings
High-resolution chest CT shows numerous, stable, bilateral subcentimeter pulmonary nodules, some of which demonstrate a central lucency (Cheerios). The nodules are stable over a 15-month period in a patient with a history of asthma. Pathological biopsy confirms minute pulmonary meningothelial-like nodules.
Key takeaways
Diffuse pulmonary meningotheliomatosis is a benign condition characterized by multiple minute pulmonary meningothelial-like nodules (MPMNs) in the lung parenchyma. These nodules can exhibit a central lucency, mimicking Langerhans cell histiocytosis or cavitary metastases. They are benign 'don't touch' lesions that are stable on serial imaging and do not require intervention.
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