摘要：

It is generally believed that intracranial tumors do not metastasize outside the cranial and spinal dura mater. Metastases inside the dura—in the lepto-meninges and in the substance of the brain and spinal cord—are known to occur frequently with medulloblastomas and occasionally with other malignant intracranial tumors. The more benign gliomas, such as astrocytoma and oligodendroglioma, have not until recent years been considered capable of giving rise to metastases. The report of Cairns and Russell (1) has been especially stimulating in this respect.

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