My wife worked for a propane company for 3 years - in a building where her office was shared with the propane delivery truck. Within a year of leaving the company, she was diagnosed with acute myeloid lukemia. I have just read something stating that propane has traces of benzene in it and that exposure to benzene can cause acute lukemia.

My question: Is it possible that a work environment that exposed my wife to propane for 3 years could have been the cause to her acute myeloid lukemia?

Source:

A study conducted by the Argonne National Laboratory and published by the World LP Gas Association, on the air toxics emitted by different fuels during the well-to-wheels fuel cycle, shows that propane emits certain levels of benzene.

The study also revealed that Benzene - a known carcinogen; causes cancer; long-term exposure to high-levels in the air can cause leukemia and cancer of the blood-forming organs; can damage the immune system.