Metastasis to intracranial meningioma as first clinical manifestation of occult primary lung carcinoma.

Metastasis to an intracranial meningioma was the first clinical manifestation of an occult primary bronchogenic carcinoma. The principles of diagnosis on morphologic and immunohistochemical findings are discussed, particularly as regards the differential diagnosis between a metastasis to meningioma and microcystic or secretory meningioma.