Inorganic Arsenic and Basal Cell Carcinoma in Areas of Hungary, Romania, and Slovakia: A Case-Control Study

• Published in: Environmental health perspectives Vol. 120; no. 5; pp. 721 - 726
• Main Authors: Leonardi, Giovanni, Vahter, Marie, Clemens, Felicity, Goessler, Walter, Gurzau, Eugen, Hemminki, Kari, Hough, Rupert, Koppova, Kvetoslava, Kumar, Rajiv, Rudnai, Peter, Surdu, Simona, Fletcher, Tony
• Format: Journal Article
• Language: English
• Published: Research Triangle Park, NC National Institute of Environmental Health Sciences 01.05.2012; US Department of Health and Human Services
• Subjects: Arsenic; Arsenic - metabolism; Arsenic - toxicity; Basal cell carcinoma; Biological and medical sciences; Body centered cubic lattice; Cancer; Carcinoma, Basal Cell - chemically induced; Carcinoma, Basal Cell - epidemiology; Case control studies; Chemical and industrial products toxicology. Toxic occupational diseases; Contamination; Dosage; Drinking water; Environment. Living conditions; Environmental Exposure; Environmental health; Health; Health aspects; Hungary - epidemiology; Life cycle assessment; Logistic Models; Medical sciences; Medicin och hälsovetenskap; Metabolism; Metals and various inorganic compounds; Physiological aspects; Potable water; Public health. Hygiene; Public health. Hygiene-occupational medicine; Risk; Risk Assessment; Risk Factors; Romania - epidemiology; Skin cancers; Skin Neoplasms - chemically induced; Skin Neoplasms - epidemiology; Slovakia - epidemiology; Sunlight; Toxicology; Urine; Romania; Slovakia; Hungary; Europe; United Kingdom; Human; Urine; Biological fluid; Carcinoma; Arsenic; Low dose; Arsenic compound; Malignant tumor; Case control study; Metabolism; skin neoplasms; Epidemiology; Health and environment; Skin; Methylation; low-dose arsenic; Cell; Public health; Cancer
• ISSN: 0091-6765; 1552-9924; 1552-9924
• DOI: 10.1289/ehp.1103534

Background: Inorganic arsenic (iAs) is a potent carcinogen, but there is a lack of information about cancer risk for concentrations < 100 μg/L in drinking water. Objectives: We aimed to quantify skin cancer relative risks in relation to iAs exposure < 100 μg/L and the modifying effects of iAs metabolism. Methods: The Arsenic Health Risk Assessment and Molecular Epidemiology (ASHRAM) study, a case-control study, was conducted in areas of Hungary, Romania, and Slovakia with reported presence of iAs in groundwater. Consecutively diagnosed cases of basal cell carcinoma (BCC) of the skin were histologically confirmed; controls were general surgery, orthopedic, and trauma patients who were frequency matched to cases by age, sex, and area of residence. Exposure indices were constructed based on information on iAs intake over the lifetime of participants. iAs metabolism status was classified based on urinary concentrations of methylarsonic acid (MA) and dimethylarsinic acid (DMA). Associations were estimated by multivariable logistic regression. Results: A total of 529 cases with BCC and 540 controls were recruited for the study. BCC was positively associated with three indices of iAs exposure: peak daily iAs dose rate, cumulative iAs dose, and lifetime average water iAs concentration. The adjusted odds ratio per 10-μg/L increase in average lifetime water iAs concentration was 1.18 (95% confidence interval: 1.08, 1.28). The estimated effect of iAs on cancer was stronger in participants with urinary markers indicating incomplete metabolism of iAs: higher percentage of MA in urine or a lower percentage of DMA. Conclusion: We found a positive association between BCC and exposure to iAs through drinking water with concentrations < 100 μg/L.