About 13,000 deaths each year in the United States are attributed to primary central nervous system (CNS) malignancies. An estimated 20% of patients with cancer eventually develop clinically apparent CNS metastases, and an estimated 170,000 cases of brain metastases are diagnosed in the United States yearly. Autopsy studies suggest that as many as 50% of patients dying from advanced cancer may have metastasis to the CNS. This chapter provides an overview of primary and metastatic CNS malignancies with in-depth discussion of gliomas, primary CNS lymphoma, meningioma, brain metastases, leptomeningeal metastases, and metastatic epidural spinal cord compression. Discussions cover epidemiology, etiology, diagnosis, and treatment of gliomas, including surgery, radiotherapy, and chemotherapy for both newly diagnosed gliomas and recurrent gliomas. The epidemiology, diagnosis, treatment and prognosis for primary CNS lymphomas are reviewed, as well as the epidemiology, etiology, diagnosis, treatment, and prognosis for meningiomas. Epidemiology, diagnosis, and prognosis for brain metastases are briefly discussed, and the section on treatment includes surgery, stereotactic radiosurgery, and wh
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