[Pulmonary metastasis of meningioma of the falx cerebri].

We report the case of a woman who had been operated upon for a recurrent meningioma of the falx cerebri which, 22 years after it was discovered, produced pulmonary metastases. Metastases from meningiomas are extremely rare; they affect the lungs in 60% of the cases or, less frequently, the liver or lymph nodes. The factors predictive of secondary dissemination are the site of the tumour, the quality of excision, the histological type (haemangiopericytic meningioma) and the presence of cell necrosis, hypercellularity and strong mitotic activity.