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Blood, 15 August 2006, Vol. 108, No. 4, pp. 1363-1369.
Prepublished online as a Blood First Edition Paper on April 18, 2006; DOI 10.1182/blood-2005-12-008755.
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NEOPLASIA
Agricultural pesticide use and risk of t(14;18)-defined subtypes of non-Hodgkin lymphoma
Brian C.-H. Chiu,
Bhavana J. Dave,
Aaron Blair,
Susan M. Gapstur,
Shelia Hoar Zahm, and
Dennis D. Weisenburger
From the Department of Preventive Medicine, Northwestern University Medical School, Chicago, IL; the Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL; the Munroe Meyer Institute for Genetics and Rehabilitation, University of Nebraska Medical Center, Omaha; the Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha; and the Division of Cancer Epidemiology and Genetics, National Cancer Institute (NCI), National Institutes of Health (NIH), Department of Health and Human Services (DHHS), Bethesda, MD.
Pesticides have been specifically associated with the t(14;18)(q32;q21) chromosomal translocation. To investigate whether the association between pesticides and risk of non-Hodgkin lymphoma (NHL) differs for molecular subtypes of NHL defined by t(14; 18) status, we obtained 175 tumor blocks from case subjects in a population-based case-control study conducted in Nebraska between 1983 and 1986. The t(14;18) was determined by interphase fluorescence in situ hybridization in 172 of 175 tumor blocks. We compared exposures to insecticides, herbicides, fungicides, and fumigants in 65 t(14;18)-positive and 107 t(14;18)-negative case subjects with those among 1432 control subjects. Multivariate polytomous logistic regression was used to calculate odds ratios (ORs) and 95% confidence intervals (CIs). Compared with farmers who never used pesticides, the risk of t(14;18)-positive NHL was significantly elevated among farmers who used animal insecticides (OR = 2.6; 95% CI, 1.0-6.9), crop insecticides (OR = 3.0; 95% CI, 1.1-8.2), herbicides (OR = 2.9; 95% CI, 1.1-7.9), and fumigants (OR = 5.0; 95% CI, 1.7-14.5). None of these pesticides were associated with t(14;18)-negative NHL. The risk of t(14;18)-positive NHL associated with insecticides and herbicides increased with longer duration of use. We conclude that insecticides, herbicides, and fumigants were associated with risk of t(14;18)-positive NHL but not t(14;18)-negative NHL. These results suggest that defining subsets of NHL according to t(14;18) status is a useful approach for etiologic research.

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