The Automatic Cancer Agency at the World Health Organization said that the percentage of people with lung cancer who have never smoked, with air pollution “an important factor”.
It is now estimated that lung cancer in people who have never smoked cigarettes or tobacco is the fifth highest cause of cancer deaths all over the world, according to the IAC.
IARC said that lung cancer in the two schools of thought also does not happen almost like glandular cancer, which has become the most important four -main sub -species in both men and women worldwide.
About 200,000 cases of glandular cancer were associated with air pollution in 2022, according to the IARC study It was published in the Lancet of respiratory medicine magazine.
The study found that the largest burden on glandular cancer is due to air pollution in East Asia, especially China.
In an interview with The Guardian, Dr. Freddy Bray, the lead author of the study and head of the IARC Cancer Branch, said that the results emphasized the need for urgent monitoring of the risk of lung cancer.
He added that there was no need for the main cause of lung cancer, such as additional studies to identify potential causal factors, such as air pollution, in the population where smoking was not the main cause of lung cancer.
“With the decrease in the spread of smoking – as shown in the United Kingdom and the United States – the percentage of lung cancers that were diagnosed among those who have never smoked it tend to increase,” said Bray. “Whether the global ratio is a glandular tumor that is due to the surrounding air pollution, it will depend on the relative success of the future strategies to reduce the use of tobacco and air pollution around the world.”
Lung cancer is still the main cause of cancer and deaths around the world. In 2022, about 2.5 million people were diagnosed with the disease. However, the sub -type infection patterns have changed significantly in recent decades.
Among the four main sub -species of lung cancer (glandular cancer, healing cell cancer, small cell cancer and large cell cancer), glandular cancer has become the prevailing sub -type between men and women alike, I found iarc.
Glandular cancer accounted for 45.6 % of global lung cancer cases between men and 59.7 % of global lung cancer cases among women in 2022. The numbers concerned were 39.0 % and 57.1 % in 2020.
IARC said the benign tumor represents up to 70 % of lung cancer cases between smokers at all.
While men’s lung cancer rates have generally decreased in most countries during the past forty years, the rates between women tend to continue to rise.
Current trends indicate that while men still make up most cases of lung cancer (about 1.6 million in 2022), the gap between male and female lung cancer accidents is narrowed, with about 900,000 women with lung cancer in 2022.
In 2023, The guardian revealed How the number of women with lung cancer in the UK was outperforming men for the first time, which prompted invitations to women to be vigilant about it as in breast cancer.
Cancer experts said that the numbers reflect the historical differences in the spread of smoking, specifically that the smoking rates reached their peak early in many men. They said that women are now alert to signs of possible lung cancer as they were about checking the blocks in their breasts.
The changes in the manufacture of cigarettes and smoking smoking in recent decades have affected the trends in lung cancer according to the sub -type, and there is Evidence of accumulation IARC said the causal relationship between air pollution and increased risk of glandular.
It is not known what is the percentage of global lung cancer cases that do not exceed smokers, only these evidence indicates that it rises. Scientists are racing to learn more about what causes lung cancer, exceeding smoking.
“Air pollution can be considered an important factor that partially explains the emerging dominance of glandular cancer, which represents 53 % to 70 % of lung cancer cases among people who have never smoked all over the world,” the study mentioned.
Bray said that the study provided important visions on how lung cancer and essential risk factors evolved, “providing evidence about how to prevent lung cancer optimally all over the world.”
He added: “The changes in the patterns of smoking and exposure to air pollution are among the main determinants of the variable risk of lung cancer by the sub -type that we see today.
“Displaceable gender trends in recent generations provide visions of cancer prevention and policymakers who seek to develop and implement tobacco pollution strategies and air designed specifically to the population at risk.”
