World Bulletin / News Desk
People who survived the atomic bombings of Hiroshima and Nagasaki as children continue to have a higher-than-normal risk of thyroid cancer more than 50 years after radiation exposure, according to a U.S. study.
Thyroid cells are particularly vulnerable to ionizing radiation, the kind produced by the Chernobyl nuclear meltdown or the atomic bombings in Japan.
The study published in the International Journal of Cancer tracked new cancer diagnoses in people who were in Japan during the bombings in 1945 and those who were not.
In total, there were 371 thyroid cancers diagnosed between 1958 and 2005 in about 105,000 atomic bomb survivors.
The study found little evidence that adults exposed to the radiation were more likely to develop thyroid cancer later on.
However, for children exposed to the radiation, the result was different. The study found 36 percent of 191 thyroid cancers in people who were children or teens at the time was likely due to radiation exposure.
"Thyroid cancer is one of the most radio sensitive cancers," said Kiyohiko Mabuchi at the National Cancer Institute in Bethesda, Maryland, who worked on the study.
"Younger (thyroid) tissue may be more sensitive to radiation - that's one of the hypotheses."
The thyroid releases hormones that help regulate the body's metabolism. The gland works especially hard during times of fast growth and development in children and teens.
The researchers said it was not clear whether the findings have implications for Japanese children who were living near the Fukushima nuclear plant, which suffered a meltdown last March following an earthquake and tsunami.
In the case of Fukushima, quick evacuations may have minimized the exposure risk, said radiation researcher John Boice from Vanderbilt University in Nashville, Tennessee.
Boice pointed out that even among atomic bomb survivors, the risk of thyroid cancer was very low for people who only got a small dose of radiation.
"And, it appears around Fukushima and in Japan that the exposures to kids were below a level where there's been any detectable increase (in cancer risk)," Boice added.
Researchers are still calculating radiation exposures after Fukushima. A typical head CT scan delivers about 2 millisieverts (mSv) worth of radiation, compared to 350 mSv and higher exposures among people who were evacuated after Chernobyl. SOURCE: http://bit.ly/PscolC
The White House has said a decision will be announced before the G7 summit in Italy on May 26 and 27.
House Freedom Caucus says will back President Donald Trump's healthcare plans
The London-based Environmental Investigation Agency (EIA) estimated that in 2013, at least 93 percent of logging in Mozambique was illegal -- and that most of the illicit timber ended up sold in China.
Erik Solheim told AFP in an interview on Monday that even if the United States withdraws, China and the European Union will step in and take the lead to implement the global agreement on reducing greenhouse gas emissions.
Polyethylene represents 40 percent of Europe's demand for plastic products, mostly in the form of packaging and shopping bags.
The High Court had demanded ministers come up with a plan to tackle illegal levels of nitrogen dioxide pollution, largely caused by diesel emissions, by 3:00 pm (1400 GMT) on Monday.
PEG-2S promises to tackle superbugs that threaten world health
The change affects grazing conditions for the 146,000 or so semi-domesticated reindeer in Norway who feed on lichen and moss under the snow.
The discovery of the giant shipworm, a species never before studied, marked the first time scientists had live specimens in hand, according to an article published this week in American journal Proceedings of the National Academy of Sciences.
As many as one in 45 children are diagnosed with autism spectrum disorder in the United States, according to a recent study by the US Centers for Disease Control and Prevention.
A full 1.6 billion people remain affected by NTDs -- more than 500 million of them children -- but that number is down from more than two billion in 2010, WHO said.
For the first time ever in modern history, a team of scientists Monday documented as what they're describing as large-scale river reorganization as a result of human-caused climate change.
In the next few hours he will receive a healthy kidney thanks to a pioneering system that has made Spain the world leader in organ transplants for the past 25 years.
Japan's corals, the northernmost in the world, could offer important data to bolster knowledge about marine life, as Australia's Great Barrier Reef faces a threat to its survival.
China is the world's largest consumer and producer of tobacco, and the industry provides the government with colossal sums.
During his time leading IAS, Mark Wainberg organised the 13th International AIDS conference in Durban, South Africa, and he also co-chaired the same conference in Toronto in 2006.