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Abstract
We compared survival outcomes and rates of secondary non-Hodgkin lymphoma (NHL) in 28 323 patients with nodular lymphocyte predominant (NLPHL) and classical Hodgkin lymphoma (HL) from the Surveillance, Epidemiology and End Results database, diagnosed between 1995 and 2010. In a multivariate analysis NLPHL demonstrated a significantly better relative survival (5-year risk of lymphoma-related death 5.7%, hazard ratio [HR] 0.46, p < 0.0001) than the reference nodular sclerosis (NSHL) subtype (5-year risk 12.7%). Lymphocyte-rich classical HL had outcomes comparable to NSHL (5-year risk 14.3%, HR 0.84, p = 0.11). Exceptionally poor outcomes were observed in lymphocyte depleted HL (5-year risk 48.8%, HR 2.26, p < 0.0001). The risk of secondary NHL was increased in NLPHL (HR 2.81, p < 0.001) and lymphocyte-rich classical HL (HR 2.27, p = 0.002), but not in other subtypes compared with NSHL. In conclusion, the histologic classification retains a significant prognostic value in HL and the disparities between the subtypes warrant customized treatment and surveillance strategies.
Acknowledgements
This study used the SEER database. The interpretation and reporting of these data are the sole responsibility of the authors. The authors acknowledge the efforts of the Applied Research Program, National Cancer Institute; Information Management Services Inc; and the SEER program tumor registries in the creation and maintenance of the SEER database as a research resource.
Potential conflict of interest:
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