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    Timing of high-dose methotrexate CNS prophylaxis in DLBCL: an analysis of toxicity and impact on R-CHOP delivery

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    Authors
    Wilson, M. R.
    Eyre, T. A.
    Martinez-Calle, N.
    Ahearne, M.
    Parsons, K. E.
    Preston, G.
    Khwaja, J.
    Schofield, J.
    Elliot, Johnathon
    Mula Kh, A.
    Shah, N.
    Cheung, C. K.
    Timmins, M. A.
    Creasey, T.
    Linton, Kim M
    Smith, J.
    Fox, C. P.
    Miall, F.
    Cwynarski, K.
    McKay, P.
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    Affiliation
    Beatson West of Scotland Cancer Centre, Glasgow, United Kingdom.
    Issue Date
    2020
    
    Metadata
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    Abstract
    High-dose methotrexate (HD-MTX) is increasingly used as prophylaxis for patients with diffuse large B-cell lymphoma (DLBCL) at high risk of central nervous system (CNS) relapse. However, there is limited evidence to guide whether to intercalate HD-MTX (i-HD-MTX) between R-CHOP-21 (rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisolone given at 21-day intervals) or to give it at the end of treatment (EOT) with R-CHOP-21. We conducted a retrospective, multicenter analysis of 334 patients with DLBCL who received CNS prophylaxis with i-HD-MTX (n = 204) or EOT HD-MTX (n = 130). Primary end points were R-CHOP delay rates and HD-MTX toxicity. Secondary end points were CNS relapse rate, progression-free survival, and overall survival. The EOT group had more patients with a high CNS international prognostic index (58% vs 39%; P < .001) and more concurrent intrathecal prophylaxis (56% vs 34%; P < .001). Of the 409 cycles of i-HD-MTX given, 82 (20%) were associated with a delay of next R-CHOP (median, 7 days). Delays were significantly increased when i-HD-MTX was given after day 9 post-R-CHOP (26% vs 16%; P = .01). On multivariable analysis, i-HD-MTX was independently associated with increased R-CHOP delays. Increased mucositis, febrile neutropenia, and longer median inpatient stay were recorded with i-HD-MTX delivery. Three-year cumulative CNS relapse incidence was 5.9%, with no differences between groups. There was no difference in survival between groups. We report increased toxicity and R-CHOP delay with i-HD-MTX compared with EOT delivery but no difference in CNS relapse or survival. Decisions on HD-MTX timing should be individualized and, where i-HD-MTX is favored, we recommend scheduling before day 10 of R-CHOP cycles.
    Citation
    Wilson MR, Eyre TA, Martinez-Calle N, Ahearne M, Parsons KE, Preston G, et al. Timing of high-dose methotrexate CNS prophylaxis in DLBCL: an analysis of toxicity and impact on R-CHOP delivery. Blood Advances. 2020;4(15):3586-93.
    Journal
    Blood Advances
    URI
    http://hdl.handle.net/10541/623283
    DOI
    10.1182/bloodadvances.2020002421
    PubMed ID
    32761231
    Additional Links
    https://dx.doi.org/10.1182/bloodadvances.2020002421
    Type
    Article
    Language
    en
    ae974a485f413a2113503eed53cd6c53
    10.1182/bloodadvances.2020002421
    Scopus Count
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