Abstract
A 44-year-old woman who underwent chest CT for a medical check-up presented with multiple nodules in both lungs. She had no specific symptoms. Some of the multiple pulmonary nodules on chest CT were associated with a cavity within the nodules. The multiple lung nodules were followed up with chest CT, but there was no change in size over 3 years. Video-assisted thoracic surgery was performed, and the diagnosis of minute pulmonary meningothelial-like nodules (MPMNs) was established by pathological examination. Recently, MPMNs have been in-creasingly discovered on chest CT. It is clinically problematic to discriminate MPMNs from multifocal micronodular pneumocyte hyperplasia (MMPH) or multiple Well-differentiated adenocarcinoma. When chest CT shows multiple pulmonary nodules in both lungs in patients with neither malignancy nor tuberous sclerosis, MPMNs should be considered. Multiple pulmonary lesions with a cavity may be more suggestive of MPMNs than MMPH.
