Rituximab, Methotrexate, Procarbazine and Lomustine (R-MPL) for the Treatment of Primary CNS Lymphoma

Introduction: Primary central nervous lymphoma (PCNSL) is a rare type of non-Hodgkin lymphoma that may involve the brain, spinal cord, leptomeninges and vitreous. The median age at diagnosis is in the fifth decade and most patients (pts) present with significant neurologic deficit and a low performa...

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Veröffentlicht in:Blood 2020-11, Vol.136 (Supplement 1), p.48-49
Hauptverfasser: Lebel, Eyal, Goldschmidt, Neta, Siegal, Tali, Lossos, Alexander, Gatt, Moshe, Gural, Alexander, Shaulov, Adir, Saban, Revital, Lavie, David, Nachmias, Boaz
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Sprache:eng
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Zusammenfassung:Introduction: Primary central nervous lymphoma (PCNSL) is a rare type of non-Hodgkin lymphoma that may involve the brain, spinal cord, leptomeninges and vitreous. The median age at diagnosis is in the fifth decade and most patients (pts) present with significant neurologic deficit and a low performance status. The optimal treatment of PCNSL is controversial. High dose methotrexate (HDMTX) is a standard treatment of PCNSL and is more effective when given in combination with other CNS-penetrating medications, which, however, add to the toxicity of the treatment. We aimed to evaluate the effectiveness and the safety of the combination of rituximab, HDMTX, procarbazine and lomustine (R-MPL) in pts with PCNSL. Patients and methods: We retrospectively reviewed the files of PCNSL pts treated in Hadassah Medical Center, Jerusalem, Israel, between the years 2006-2019. The medical records were reviewed for demographic details and initial disease characteristics (age, sex, performance status, laboratory results, cerebrospinal fluid (CSF) content and tumor location), and for therapeutic details including chemotherapy protocol, toxicity, response to treatment and survival. We excluded pts who could not receive HDMTX. The R-MPL is a 42-day cycle protocol, consisting IV Rituximab 375 mg/m2 on days 1, 15 and 28, IV HDMTX 5 g/m2 (3.5 g/m2 for pts > 60 Years (y)) on days 2, 15 and 29, PO procarbazine 100 mg/m2 (60 mg/m2 for pts > 60 y) on days 3-9, PO lomustine 60 mg/m2 (40 mg/m2 for pts > 60 y) on day 2. Six to nine intrathecal (IT) injections of MTX / cytarabine were included for pts with positive CSF cytology, tumor adjacent to ventricles, or per physician’s decision. Rituximab was given for no more than 8 doses in total. A total of 3-4 courses of R-MPL were given. Responsive pts could proceed to autologous stem cell transplant (ASCT) with TECAM conditioning or 2 cycles of intermediate dose cytarabine (IDAC, 1.5 g/m2), 2 doses in each cycle. Those who achieved less than CR or had significant toxicity to R-MPL received additional ifosfamide/etoposide or high dose cytarabine or temazolamide or topotecan. Radiation was given only for salvage. Results: Fifty-two pts were included in the study. Median age was 62 years (range 28-94). Three (6%) had leptomeningeal involvement, thirteen (25%) had vitreoretinal involvement, 30 (58%) had involvement of the deep brain. Mean ECOG, IELSG and MSKCC scores were 1.98, 2.53 and 1.94 respectively. The median number of HDMTX doses was 8 (r
ISSN:0006-4971
1528-0020
DOI:10.1182/blood-2020-140949