What are the risk factors for secondary non-Hodgkin lymphoma (NHL)?

Updated: Jun 14, 2018
  • Author: J Martin Johnston, MD; Chief Editor: Max J Coppes, MD, PhD, MBA  more...
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Answer

Patients successfully treated for Hodgkin disease are at increased risk for developing non-Hodgkin lymphoma. This phenomenon appears to reflect the combined effects of chemotherapy and radiotherapy, as well as the immunosuppressive effects of Hodgkin disease. Adults older than 40 years who received combined-modality therapy are at particular risk; their 15-year incidence of non-Hodgkin lymphoma is as high as 39%. [11]

Splenectomy, now rarely performed in patients with Hodgkin disease, is another reported risk factor for secondary malignancies, including non-Hodgkin lymphoma. [12]

Secondary non-Hodgkin lymphoma is less common among pediatric patients who survive cancer than among adults. A cohort of 5484 children was treated for various malignancies at St Jude Children's Research Hospital. Over 30,710 person-years of follow-up care, only 3 had secondary non-Hodgkin lymphoma. The 15-year actuarial risk of non-Hodgkin lymphoma was 0.16% in this group.

However, even among children, patients treated for Hodgkin disease are particularly at risk. A literature review revealed 24 incidents of secondary non-Hodgkin lymphoma among patients whose primary malignancy had been diagnosed when they were younger than 20 years. Eighteen (75%) of the patients previously had Hodgkin disease. [13]


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