Occupational histories and exposures are important aspects of what causes cancer. Occupationally related cancers generally are associated with exposure to chemicals or other toxicants. The type of chemical/toxicant exposure, duration of exposure, and route of exposure: ingestion, smoke contacting your mouth and then being swallowed vs. inhalational vs. topical exposure through direct contact with the skin also play a role in what type of cancer may develop as a result of the exposure. Additionally, certain health conditions, family history, diet and nutrition, exposure to tobacco, and alcohol and drug consumption influence whether an individual develops cancer. Smoke from burning structures and wildland fires is known to contain carcinogens. Firefighters are exposed to chemicals and toxicants as part of their job. Steps firefighters take to decrease their exposure to toxic chemicals and carcinogens are:

          ◦Wearing protective equipment during a call to a fire.

          ◦Taking a shower after a fire call.

          ◦Washing fire gear after fire calls.