A recently published article from CancerConsultants.com reports:

Occupational Solvents May Increase Risk of Lymphoma

Researchers from Italy have reported that occupational exposure to solvents such as benzene, xylene, and toluene may increase the risk of developing non-Hodgkin’s lymphoma (NHL) and Hodgkin’s lymphoma (HL). The details of this case-control study were published in Epidemiology .

[...]

Many, but not all, studies show a consistent link between woodworking and Hodgkin’s disease . Trichloroethylene is an organic chemical used in dry cleaning, metal degreasing and as a solvent for oils and resins and has been identified to cause liver and kidney cancer in animals. Exposure to trichloroethylene has been associated with an increased chance of developing Hodgkin's disease and other cancers. Machinists in the metal working industry have also been reported to have a higher than average incidence of Hodgkin's disease. Exposure to pesticides has been associated with an increased incidence of Hodgkin's disease in some, but not all, clinical studies. It has also been known for some time that young adults with infectious mononucleosis are at increased risk for the development of Hodgkin’s lymphoma.

Read the full article here. Or check out the abstract of the study, entitled "Occupational Exposure to Solvents and the Risk of Lymphomas." (the full study is available here for download with registration)