Objective To investigate the clinical and imaging features,pathological features and differential diagnosis of primary pulmonary meningioma.Methods A retrospective analysis of the clinical features of 10 cases of primary pulmonary meningioma was performed,and a review and study of relevant literature at home and abroad on their imaging and histopathological features was conducted.Results All 11 patients were female,age 50～72 years.They were all sporadic during physical examinations and had no symptoms.Among them,2 cases presented with ground glass nodules,8 cases were single solid nodules,and pulmonary meningioma nodules were all located under the pleura.Among the 10 cases,7 cases were complicated with lung adenocarcinoma,and no special treatment was given after surgery.Follow up for 1～4 years showed no recurrence or metastasis.Through microscopic observation,primary pulmonary meningioma was composed of spindle shaped cells and epithelioid cells,with a vortex-like structure and an elliptical nucleus,without atypia.Conclusion Primary pulmonary meningioma is extremely rare and often benign.It can appear as ground glass nodules or solid nodules on imaging,and is more common under the pleura.Based on the clear diagnosis based on pathological morphology and immunohistochemistry,differ ential diagnosis should be made for metastatic meningioma,and surgical resection is the preferred treatment.
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