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9/11 rescue workers have higher rates of leukemia: Study

9/11 rescue workers have higher rates of leukemia: Study

Rescue workers who were at the World Trade Centre site in the US after the attacks on September 11, 2001, have increased leukemia incidence, in addition to elevated rates of cancer, particularly thyroid and prostate cancers, according to a study. Following the attacks, 50,000 workers were involved in rescue and recovery at the site, with many of them caught directly in the dust cloud from the collapsing towers.

From then, until cleanup of the site ended in June 2002, workers were potentially exposed to an array of toxins later shown to cause adverse health effects, including cancer. The study, published in JNCI Cancer Spectrum, examined cancer incidence in responders including law enforcement, construction, and telecommunications workers, and found an increased overall cancer incidence, with the greatest elevation in thyroid cancer.

It is the first study to show an increase in leukemia, which is known to occur after exposure to occupational carcinogens, researchers said. These include benzene fuel and other sources that existed at the World Trade Center site, in some cases at low levels of exposure, and with a latency of several years from exposure, they said.

Researchers also found that neither the length of time that first responders and recovery workers worked on the site, nor the intensity of their exposure, had any bearing on the development of the cancers. However, some risk factors -- such as responders' age on September 11, their gender, and whether they were smokers at the time -- were associated with increased cancer risk, underlining the need for continued surveillance of the rescue and recovery workers.

"This study showed increased incidence of several cancer types compared to previously conducted studies with shorter follow-up periods," said Susan Teitelbaum, Professor at the Icahn School of Medicine in the US, and one of the lead authors. "Because of the long latency period of many types of cancer, it is possible that increased rates of other cancers, as well as World Trade Center exposure health issues, may emerge after longer periods of study," Teitelbaum said.

Researchers studied post-September 11 cancer incidence among 28,729 rescue and recovery workers via cancer registry data from New York, New Jersey, Connecticut, Pennsylvania, Florida, and North Carolina from 2002 through 2013. However, the incidence of certain cancers, such as lung, was not elevated in this study's findings, researchers said.

They believe this may be due to the long time periods over which these cancers develop.

(This story has not been edited by Devdiscourse staff and is auto-generated from a syndicated feed.)

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