Abstract
Diffuse large B-cell lymphoma (DLBCL) is a clinically heterogeneous disease. To evaluate the clinical relevance of the serum soluble interleukin-2 receptor (sIL-2R) level, we retrospectively analyzed 178 patients aged ≥60 years who were newly diagnosed with DLBCL. We determined the cutoff value of the sIL-2R level to be 1280 U/mL using the area under the receiver operating characteristic curve. The high sIL-2R group exhibited significantly inferior 5-year progression-free survival (PFS) (36.2% vs. 86.1%, p < .001) and 5-year overall survival (OS) (49.7% s. 83.8%, p < .001) than the low sIL-2R group. Multivariate analysis revealed that a high sIL-2R level was a significant prognostic factor for PFS and OS (hazard ratio [HR]: 5.65, p < .001 and HR: 2.99, p = .001, respectively). This study showed that measurement of the sIL-2R level at diagnosis is clinically beneficial for identifying elderly patients with DLBCL who have a poor prognosis.
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