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Clinical Trials |
Department of Medicine, Brown University School of Medicine, Providence, Rhode Island 02860 [M. J. G.]; Department of Neuro-Oncology, M. D. Anderson Cancer Center, Houston, Texas 77030 [K. A. J.]; Department of Neurology, University of California at San Diego Medical Center, San Diego, California 92103 [M. C. C., S. B. H.]; Department of Neurology, H. Lee Moffitt Cancer Center, Tampa, Florida 33612 [S. P.]; Department of Neurology, University of Massachusetts Medical School, Worcester, Massachusetts 01655 [L. R.]; Departments of Hematology and Oncology, Loyola University Chicago, Maywood, Illinois 60153 [L. J. S.]; Department of Pediatrics, University of Florida College of Medicine, Gainesville, Florida 32610 [B. M.]; Rush Cancer Institute, Chicago, Illinois 60612 [S. L.]; DIANON Systems, Stratford, Connecticut 06611 [G. B. S.]; and Section of Biostatistics and Epidemiology, Dartmouth Medical School, Lebanon, New Hampshire 05055 [B. F. C.]
Standard treatment for neoplastic meningitis requires frequent intrathecal (IT) injections of chemotherapy and is only modestly effective. DepoCyt is a sustained-release formulation of cytarabine that maintains cytotoxic concentrations of the drug in the cerebrospinal fluid (CSF) for more than 14 days after a single 50-mg injection. We conducted a randomized, controlled trial of DepoCyt versus methotrexate in patients with solid tumor neoplastic meningitis. Sixty-one patients with histologically proven cancer and positive CSF cytologies were randomized to receive IT DepoCyt (31 patients) or IT methotrexate (30 patients). Patients received up to six 50-mg doses of DepoCyt or up to sixteen 10-mg doses of methotrexate over 3 months. Treatment arms were well balanced with respect to demographic and disease-related characteristics. Responses occurred in 26% of DepoCyt-treated and 20% of methotrexate-treated patients (P = 0.76). Median survival was 105 days in the DepoCyt arm and 78 days in the methotrexate arm (log-rank P = 0.15). The DepoCyt group experienced a greater median time to neurological progression (58 versus 30 days; log-rank P = 0.007) and longer neoplastic meningitis-specific survival (log-rank P = 0.074; median meningitis-specific survival, 343 versus 98 days). Factors predictive of longer progression-free survival included absence of visible central nervous system disease on neuroimaging studies (P < 0.001), longer pretreatment duration of CSF disease (P < 0.001), history of intraparenchymal tumor (P < 0.001), and treatment with DepoCyt (P = 0.002). The frequency and grade of adverse events were comparable between treatment arms. In patients with solid tumor neoplastic meningitis, DepoCyt produced a response rate comparable to that of methotrexate and significantly increased the time to neurological progression while offering the benefit of a less demanding dose schedule.
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