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Occupational asbestos exposure is associated with pharyngeal squamous cell carcinoma in men from the greater Boston area.

Authors
Langevin-SM; O'Sullivan-MH; Valerio-JL; Pawlita-M; Applebaum-KM; Eliot-M; McClean-MD; Kelsey-KT
Source
Occup Environ Med 2013 Dec; 70(12):858-863
NIOSHTIC No.
20043322
Abstract
Objectives: Asbestos is the name given to a group of naturally occurring silicate mineral fibres that were widely used in industry during the 20th century due to their desirable physical properties. Although use in the USA has fallen over the last three decades, significant exposure in the developing world continues and the burden of disease is considerable. Asbestos is a known risk factor for several malignant diseases, including lung cancer and mesothelioma, and has more recently been implicated in pharyngeal and laryngeal cancer. However, studies of asbestos and cancers of the larynx or pharynx with adequate sample size that control for major head and neck squamous cell carcinoma (HNSCC) risk factors remain relatively sparse. Methods: We report findings from a case-control study of 674 incident male HNSCC cases from the greater Boston region and 857 population-based male controls, matched on age (+/-3 years), sex, and town or neighbourhood of residence. Multivariable logistic regression was used to assess the association between occupational asbestos exposure and HNSCC by primary tumour site. Results: 190 cases (28.2%) and 203 controls (23.7%) reported occupational exposure to asbestos. Occupational asbestos exposure was associated with elevated risk of pharyngeal carcinoma in men (OR 1.41, 95% CI 1.01 to 1.97), adjusted for age, race, smoking, alcohol consumption, education, income and HPV16 serology, with borderline increasing risk for each decade in the exposed occupation (OR 1.10, 95% CI 0.99 to 1.23). Conclusions: These observations are consistent with mounting evidence that asbestos is a risk factor for pharyngeal cancer.
Keywords
Asbestos-dust; Asbestos-fibers; Asbestos-industry; Asbestos-workers; Asbestosis; Respiratory-system-disorders; Pulmonary-system-disorders; Lung-burden; Lung-disease; Malignant-neoplasms; Men; Cancer; Carcinomas; Lung-cancer; Lung-cells; Mesothelial-cells; Larynx-cancer; Risk-factors; Tumors; Mathematical-models; Demographic-characteristics; Serology; Silicates; Mineral-processing; Fibrous-bodies
Contact
Karl T. Kelsey, Departments of Community Health and Pathology and Laboratory Medicine, Center for Environmental Health and Technology, Brown University, 70 Ship Street, Box G-E5, Providence, RI 02912 USA
CODEN
OEMEEM
CAS No.
1332-21-4
Publication Date
20131201
Document Type
Journal Article
Email Address
Karl_Kelsey@brown.edu
Funding Type
Grant
Fiscal Year
2014
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-K01-OH-009390; M112013
Issue of Publication
12
ISSN
1351-0711
Source Name
Occupational and Environmental Medicine
State
OH; RI; DC; MA
Performing Organization
Boston University Medical Campus
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