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  • Title: Central nervous system toxicity of fludarabine phosphate.
    Author: Chun HG, Leyland-Jones BR, Caryk SM, Hoth DF.
    Journal: Cancer Treat Rep; 1986 Oct; 70(10):1225-8. PubMed ID: 2428492.
    Abstract:
    Fourteen patients developed severe central nervous system (CNS) toxicity after receiving an investigational antitumor agent, fludarabine phosphate (FAMP). The CNS toxicity has the distinctive features of delayed onset and progressive clinical course. Visual deficits were the most common presenting symptom and developed eventually in most cases. Deterioration of mental status and progressive encephalopathy were also observed. The development of clinical CNS toxicity appears dose-related; thirteen of 36 patients (36.1%) who received FAMP at high doses (greater than or equal to 96 mg/m2/day for 5-7 days per course) developed neurotoxicity, while only one of 443 patients (0.2%) who received the drug at low doses (less than or equal to 125 mg/m2 per course) developed similar toxicity. Although the precise mechanism responsible for this toxicity is yet unknown, progressive demyelination appears to be the responsible process. Extensive review of the clinical data failed to identify factors which might contribute to the development of CNS toxicity. Patients on trials of FAMP should be meticulously monitored for the possible development of neurotoxicity.
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