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Neuro-Oncology

Neoplastic Meningitis

University of Washington, Department of Neurology/Division of Neuro-Oncology, Fred Hutchinson Cancer Research Center, Seattle Cancer Care Alliance, Seattle, Washington, USA

Key Words. Neoplastic meningitis • Leptomeningeal metastases

Correspondence: Marc C. Chamberlain, M.D., University of Washington, Department of Neurology/Division of Neuro-Oncology, Fred Hutchinson Cancer Research Center, Seattle Cancer Care Alliance, 825 Eastlake Avenue E, POB 19023, MS G4940, Seattle, Washington 98109-1023, USA. Telephone: 206-288-8280; Fax: 206-288-2000; e-mail: chambemc{at}u.washington.edu

Received June 19, 2008; accepted for publication July 24, 2008; first published online in THE ONCOLOGIST Express on September 5, 2008.

Disclosure: Employment/leadership position: None; Intellectual property rights/inventor/patent holder: None; Consultant/advisory role: Marc C. Chamberlain, Enzon, Mundipharma; Honoraria: Marc C. Chamberlain, Enzon, Mundipharma; Research funding: None; Ownership interest: None; Expert testimony: None; Other: None. The content of this article has been reviewed by independent peer reviewers to ensure that it is balanced, objective, and free from commercial bias. No financial relationships relevant to the content of this article have been disclosed by the authors, planners, independent peer reviewers, or staff managers.

Background. Neoplastic meningitis (NM) is a common problem in neuro-oncology, occurring in approximately 5% of all patients with cancer.

Methods. Notwithstanding frequent focal signs and symptoms, NM is a disease affecting the entire neuraxis, and therefore staging and treatment need encompass all cerebrospinal fluid (CSF) compartments.

Results. Central nervous system staging of NM includes contrast-enhanced cranial computerized tomography or magnetic resonance imaging (MR-Gd), contrast-enhanced spine magnetic resonance imaging or computerized tomographic myelography and radionuclide CSF flow study. Treatment of NM incorporates involved-field radiotherapy of bulky or symptomatic disease sites and intra-CSF drug therapy. The inclusion of concomitant systemic therapy may benefit patients with NM and may obviate the need for intra-CSF chemotherapy. At present, intra-CSF drug therapy is confined to three chemotherapeutic agents (i.e., methotrexate, cytosine, arabinoside, and thio-TEPA) administered by a variety of schedules either by intralumbar or intraventricular drug delivery.

Conclusions. Although treatment of NM is palliative with an expected median patient survival of 2 to 6 months, it often affords stabilization and protection from further neurologic deterioration in patients with NM.

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