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01.09.2009 | Original Article | Ausgabe 9/2009

Annals of Hematology 9/2009

Risk factors for poor treatment outcome and central nervous system relapse in diffuse large B-cell lymphoma with bone marrow involvement

Zeitschrift:
Annals of Hematology > Ausgabe 9/2009
Autoren:
Keun-Wook Lee, Jongyoun Yi, In Sil Choi, Jee Hyun Kim, Soo-Mee Bang, Dong-Wan Kim, Seock-Ah Im, Tae-You Kim, Sung-Soo Yoon, Jong Seok Lee, Yung-Jue Bang, Seonyang Park, Byoung Kook Kim, Han Ik Cho, Dae Seog Heo
Wichtige Hinweise
K.-W. Lee and J. Yi equally contributed to this study.

Abstract

Although several studies have described the prognostic implication of bone marrow (BM) involvement (BMI) in lymphoma, studies focused on BM-involved diffuse large B-cell lymphoma (DLBCL) are very rare and small-sized. This study was performed to examine the prognostic impact of morphologic findings of BMI by lymphoma and risk factors for central nervous system (CNS) relapse in BM-involved DLBCL. Between 1993 and 2005, 675 patients were diagnosed with DLBCL, and 88 patients who had BMI at initial diagnosis were eligible for this study. The median overall survival (OS) and failure-free survival (FFS) of 88 patients were 36.6 and 20.1 months, respectively. When three variables from BM morphologic findings (the pattern of BM infiltration, extent of BMI by lymphoma, and percentage of large cells in the infiltrate) were simultaneously included into multivariate model, the increased extent of BMI by lymphoma (≥10%) in BM area was the only negative prognostic factor, independent of the International Prognostic Index (IPI). Patients with both lower IPI scores and less extent of BMI showed an excellent prognosis with chemotherapy alone (5-year OS and FFS rates, 80% and 69%). However, morphologic BM features were not independent predictive factors for CNS recurrences. An increased lactate dehydrogenase (LDH) level at initial diagnosis was the only independent predictive factor for CNS relapse. Further efforts should be directed toward finding optimal treatment modalities based on the IPI and the extent of BMI by lymphoma. CNS prophylaxis may be considered only in patients with initial elevated LDH levels.

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