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Intrathecal Central Nervous System Prophylaxis in Patients With Diffuse Large B-cell Lymphoma at an Academic Healthcare System.
Clinical Lymphoma, Myeloma & Leukemia 2019 Februrary
INTRODUCTION: Intrathecal chemoprophylaxis is often administered to patients with diffuse large B-cell lymphoma (DLBCL) to lower the rates of central nervous system (CNS) relapse, although its benefit has not been well-described. Prognostic models, including the CNS-International Prognostic Index (IPI), have been developed to aid in identifying patients at highest risk for CNS relapse.
PATIENTS AND METHODS: We evaluated 112 patients diagnosed with DLBCL from 2009 to 2016 at Emory Healthcare and classified them as high (n = 44) or low risk (n = 68) for CNS relapse and compared CNS prophylaxis rates and relapse rates between groups. The primary outcome was to compare the CNS relapse rate in high-risk patients who received intrathecal prophylaxis with patients who did not.
RESULTS: Twenty-six patients (14 high-risk and 12 low-risk) received intrathecal prophylaxis. Only 4 of 112 patients experienced a CNS relapse, including 1 in the high-risk group and 3 in the low-risk group. Among 14 high-risk patients who received intrathecal prophylaxis, no patient experienced CNS relapse compared with 1 of 30 high-risk patients without prophylaxis (P = 1.0).
CONCLUSION: Given the low rates of CNS relapse in this series, it is difficult to discern the impact of current risk stratification combined with intrathecal prophylaxis on outcomes. Our observation that many high-risk patients did not receive prophylaxis, whereas many low-risk patients received prophylaxis emphasizes the need for a standardized approach.
PATIENTS AND METHODS: We evaluated 112 patients diagnosed with DLBCL from 2009 to 2016 at Emory Healthcare and classified them as high (n = 44) or low risk (n = 68) for CNS relapse and compared CNS prophylaxis rates and relapse rates between groups. The primary outcome was to compare the CNS relapse rate in high-risk patients who received intrathecal prophylaxis with patients who did not.
RESULTS: Twenty-six patients (14 high-risk and 12 low-risk) received intrathecal prophylaxis. Only 4 of 112 patients experienced a CNS relapse, including 1 in the high-risk group and 3 in the low-risk group. Among 14 high-risk patients who received intrathecal prophylaxis, no patient experienced CNS relapse compared with 1 of 30 high-risk patients without prophylaxis (P = 1.0).
CONCLUSION: Given the low rates of CNS relapse in this series, it is difficult to discern the impact of current risk stratification combined with intrathecal prophylaxis on outcomes. Our observation that many high-risk patients did not receive prophylaxis, whereas many low-risk patients received prophylaxis emphasizes the need for a standardized approach.
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