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  • Title: Outcomes and effect of radiotherapy in patients with stage I or II diffuse large B-cell lymphoma: a surveillance, epidemiology, and end results analysis.
    Author: Ballonoff A, Rusthoven KE, Schwer A, McCammon R, Kavanagh B, Bassetti M, Newman F, Rabinovitch R.
    Journal: Int J Radiat Oncol Biol Phys; 2008 Dec 01; 72(5):1465-71. PubMed ID: 18495371.
    Abstract:
    PURPOSE: To assess disease-specific survival (DSS), overall survival (OS), and the effect of radiotherapy (RT) in patients with localized diffuse large B-cell lymphoma (DLBCL). PATIENTS AND METHODS: The Surveillance, Epidemiology, and End Results database was queried for all patients diagnosed with Stage I, IE, II, or IIE DLBCL between 1988 and 2004. The analyzable data included gender, age, race, stage, presence of extranodal disease, and RT administration. Patients who had died or were lost to follow-up within 6 months of diagnosis were excluded. RESULTS: A total of 13,420 patients met the search criteria. Of these, 5,547 (41%) had received RT and 7,873 (59%) had not. RT was associated with a significant DSS (hazard ratio, 0.82, p <0.0001) and OS benefit that persisted during the 15 years of follow-up. Elderly patients, defined either as those >60 or >70 years old, had significantly improved DSS and OS associated with RT. On multivariate analysis, RT was significantly associated with increased DSS and OS. The 5-year DSS outcomes were highly variable among patient subsets, defined by age, stage, and extranodal disease (range for RT-treated patients, 70% for Stage II, age >60 years to 87% for Stage I, age </=60 years). CONCLUSION: This analysis presents the largest detailed data set of Stage I-II DLBCL patients. The results of our study have demonstrated that RT is associated with a survival advantage in patients with localized DLBCL, a benefit that extends to elderly patients. Outcomes for discrete patient subsets varied greatly. The development of tailored therapy according to the relapse risk is warranted, rather than uniform treatment of all early-stage DLBCL.
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