Evaluation of Ki-67 as a Prognostic Marker in Diffuse Large B-Cell Lymphoma—A Single-Center Retrospective Cohort Study |
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Authors: | Fabian Huber Elisabeth Zwickl-Traxler Martin Pecherstorfer Josef Singer |
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Affiliation: | 1.Karl Landsteiner University of Health Sciences, 3500 Krems, Austria; (F.H.); (M.P.);2.Department of Internal Medicine 2, University Hospital Krems, 3500 Krems, Austria; |
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Abstract: | Background: Diffuse large B-cell lymphoma (DLBCL) is the most common non-Hodgkin lymphoma and prognostic information is essential in finding the right treatment. This study evaluated the prognostic significance of Ki-67 in patients with DLBCL. Methods: Patients with DLBCL, treated with first-line R-CHOP, were retrospectively analyzed in groups of high (>70%) and low (≤70%) Ki-67. Parameters of interest were the international prognostic index (IPI), treatment response, progression-free survival (PFS) and overall survival (OS). A chi-squared test or Fisher’s exact test was conducted to analyze categorical variables. Kaplan–Meier and log-rank tests were applied for survival analyses. Finally, a multivariate linear regression analysis was performed, including gender, Ki-67 ≤ 70% or >70%, IPI and presence of B symptoms. Results: Overall, 58 patients were included. No significant association was found between Ki-67 status and IPI (p = 0.148) or treatment response (p = 0.373). Survival in patients with high Ki-67 was significantly inferior with respect to OS (p = 0.047) but not PFS (p = 0.138). Multivariate linear regression, however, yielded only IPI as a risk factor for OS. Conclusion: Future studies with larger patient cohorts are needed in order to elucidate the prognostic role of Ki-67 in patients with DLBCL treated with R-CHOP. |
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Keywords: | diffuse large B-cell lymphoma DLBCL Ki-67 survival international prognostic index treatment response |
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