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CNS involvement occurs more frequently in patients with Behçet's disease under cyclosporin A (CSA) than under other medications—results of a retrospective analysis of 117 cases

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The aim of this study was to evaluate the incidence of neurological manifestations of Behçet's disease (BD) in patients on cyclosporin A (CSA) compared with those on other medications. The records of 117 patients with BD who visited our hospital between 1990 and 2003 were reviewed with respect to symptoms and medication. All episodes of constant therapy prior to central nervous system (CNS) involvement were counted, and then the associations were analysed by the exact Fisher–Freeman–Halton test and adjusted for multiple tests by the Bonferroni–Holm method. We observed ten new cases of CNS manifestations in our patients with BD being regularly seen and treated in our tertiary care centre. The overall prevalence of neuro-BD in our patient group was 8.5%. In a retrospective analysis, the incidence of new-onset neurological disease (neuro-BD) in all patients with BD who regularly visited our hospital was significantly higher in patients on CSA than in those on other medications (6 of 21 vs 0 of 175 episodes, P<0.0001). This contrasts the obvious efficacy of CSA on extracerebral manifestations of BD, such as severe ocular disease, mucocutaneous lesions or arthritis. CSA exerts differential efficacy on various manifestations of BD. It is very effective for severe ocular and other moderate to severe manifestations of BD, but its efficacy for the prevention of neuro-BD seems to be inferior to that of other medications used in BD, such as azathioprine or interferon-α. The reasons for this are unclear, but the potential toxic effects of CSA on the CNS may be a predisposing factor for CNS vasculitis in BD.

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We thank Prof. Hasan Yazici for his critical review of the manuscript, and Prof. CA Mueller for the human leukocyte antigen (HLA) analyses.

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Correspondence to Ina Kötter.

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Kötter, I., Günaydin, I., Batra, M. et al. CNS involvement occurs more frequently in patients with Behçet's disease under cyclosporin A (CSA) than under other medications—results of a retrospective analysis of 117 cases. Clin Rheumatol 25, 482–486 (2006).

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  • Behçet's disease
  • CNS manifestations
  • CSA