Primary solitary meningioma of the lung.

Light microscopic, ultrastructural and immunohistochemical features of a case of primary meningioma of the lung are described in this report. The lesion was incidentally discovered in the right lung of a 68-year-old man and treated by lobe resection. No evidence of recurrence or metastasis has been detected 2 years after surgery. The literature is reviewed and the differential diagnosis from other neoplasms presenting as coin lesions in the lung is stressed. Different histogenetical theories and the relation to so-called "minute pulmonary chemodectomas" are discussed.