Mount Sinai Hospital's World Trade Center Health Program has analyzed data from close to 21,000 participants in the WTC Health Program from 2001 to 2008.
That study revealed that cancer among 9/11 first responders is 15 percent higher than among people who were not exposed to the toxins at Ground Zero.
Dr. Philip Landrigan said researchers saw an increase in brain, prostate, and blood cancers (leukemia and lymphoma). He said first responders got these cancers within seven years of being exposed to the toxins at Ground Zero.
As men age, they are more susceptible to prostate cancer. But Landrigan doesn't believe age is a factor in these cases.
Currently the federal government covers 50 types of cancers under the Zadroga health law, but prostate cancer is not included.
John Feal, who runs an advocacy group for 9/11 responders, said prostate and brain cancers need to be added to the coverage under the Zadroga law.
The study also found some of the first responders had more than one type of cancer.