Mycosis fungoides (MF) is a rare disease with an unknown etiology. Its distribution suggests that occupational exposures may play a role. In the present study, we searched for occupational factors associated with MF. A European multicenter case-control study on seven rare cancers, including MF, was conducted from 1995 to 1997. Patients between 35 and 69 years of age diagnosed with MF (n = 134) were identified and their diagnoses were checked by a reference pathologist who classified 83 cases as definitive, 35 cases as possible, and 16 cases as not histologically verified. Of the 118 histologically verified cases, 104 were interviewed, of which 76 were definitive cases. As controls, we selected population controls and colon cancer controls to serve all seven case groups. Altogether, 833 colon cancer controls and 2071 population controls were interviewed. The response rate was 91.5% for cases (76 of the 83 definitive cases), and 66.6% for controls. A high risk of MF for men was observed in the industries of other non-metallic mineral products (Odds Ratio [OR] 5.3, 95% confidence interval [CI] = 1.7–16.2) and of wholesale trade (OR 3.6, 95% CI = 1.3–10.5). A high risk was found for female employees in the sector of pulp paper manufacture (OR 14.4, 95% CI = 2.2–95.1). The male occupations with the highest risks were glass formers, potters, and ceramics workers (OR 17.9, 95% CI = 5.4–59.4) and technical salesmen (OR 8.6, 95% CI = 2.4–30.8). For women, the occupations associated with the highest risks were government executives (OR 4.8, 95% CI = 1.0–22.6) and railway and road vehicles loaders (OR 3.9, 95% CI = 1.0–14.0). The results suggest that some occupational factors are associated with MF. Working as glass formers, pottery, and ceramics workers carried the highest risk, and these findings deserve further attention and replication. Females working in the paper and pulp industries may also be exposed to carcinogens of relevance to MF.
From the Unit of Public Health and Environmental Care; Department of Preventive Medicine. University of Valencia, Spain (Dr Morales-Suárez-Varela, Dr Llopis); Unit of Clinical Epidemiology, Dr Peset Universitary Hospital, Valencia, Spain (Dr Morales-Suárez-Varela); The Danish Epidemiology Science Center. University of Aarhus, Denmark (Dr Olsen); Institute of Pathology, Aalborg Hospital, Reberbansgade. Aalborg, Denmark (Dr Johannsen); INSERM Unité 170, Villejuif, France (Dr Guénel); Registre des cancers du Doubs, France (Dr Arveux); Division of Occupational and Environmental Medicine, Department of Molecular and Clinical Medicine, Faculty of Health Sciences, Sweden (Dr Wingren);Department of Oncology, Orebro Medical Center, Sweden (Dr Hardell); Bremen Institute for Prevention Research and Social Medicine, Division of Biometry and Data Processing, Bremen, Germany (Dr Ahrens); Institute for Medical Informatics, Biometry and Epidemiology University Clinic Essen, Germany (Dr Ahrens, Dr Stang); Unit of Cancer Epidemiology, CERMS and Center for Cancer Prevention, University of Turin, Italy (Dr Merletti); Department of Preventive Medicine & Public Health, University of the Basque Country, Spain (Dr Aurrekoetsea); and Molecular & Nutritional Epidemiology Unit, Center for Study and Prevention of Cancer (CSPO), Scientific Institute of Tuscany, Florence, Italy (Dr Masala).
Address correspondence to: María Morales Suárez-Varela, Unit of Public Health and Environmental Care., Department of Preventive Medicine, University of Valencia, Avda. Vicente Andrés Estellés s/n, 46100 Burjasot, Valencia, Spain; E-mail address: firstname.lastname@example.org.
M. M. Morales-Suárez-Varela has no commercial interest related to this article.