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Therapeutic radiation for lymphoma
Author(s) -
Teta M. Jane,
Lau Edmund,
Sceurman Bonnielin K.,
Wagner Meghan E.
Publication year - 2007
Publication title -
cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.052
H-Index - 304
eISSN - 1097-0142
pISSN - 0008-543X
DOI - 10.1002/cncr.22526
Subject(s) - mesothelioma , medicine , radiation therapy , incidence (geometry) , lymphoma , epidemiology , confidence interval , hodgkin lymphoma , oncology , pathology , physics , optics
BACKGROUND Ionizing radiation has been used since the 1950s to treat a variety of cancers. Cancer patients who are treated with radiotherapy have shown increased risks for a variety of second malignancies, including mesothelioma, in several recent reports. The only existing study of Hodgkin lymphoma (HL) and subsequent mesothelioma had a short observation period. METHODS The authors used Surveillance, Epidemiology, and End Results data over a 30‐year period to identify patients with HL and non‐Hodgkin lymphoma (NHL) who also were diagnosed with mesothelioma. Standardized incidence ratios (SIR) and absolute excess risks were calculated by sex and treatment modality for both types of lymphoma. RESULTS Twenty‐six patients were identified who had mesothelioma as second primaries based on 21,881 diagnoses of HL and 101,001 diagnoses of NHL. There was a statistically significant increase in mesothelioma (4 diagnoses; SIR, 6.59; 95% confidence interval [95% CI], 1.79–16.87) among men with HL who received radiation, but no women survivors were identified who had a diagnosis of mesothelioma. For NHL survivors, there was a nonsignificant excess of mesothelioma among men (SIR, 1.91; 95% CI, 0.77–3.93) and women (SIR, 3.75; 95% CI, 0.77–10.95) who had received radiation treatment. There were no increases among patients who were unirradiated. CONCLUSIONS Mesothelioma rates for patients who had received radiotherapy were increased for survivors of HL and NHL. No increases were observed among the unirradiated. These findings and the existing body of supporting studies confirmed that radiotherapy is a cause of mesothelioma. Cancer 2007. © 2007 American Cancer Society.