Lung cancer is one of the leading causes of death across the world. While smoking and exposure to second-hand smoke have traditionally been seen as the main culprits behind the deadly disease, new research from The Lancet Regional Health Southeast Asia Journal tells that the causes are beyond tobacco use. Written by a team of doctors, mainly from Tata Memorial Centre in Mumbai, the article, titled ‘Uniqueness of lung cancer in Southeast Asia’ revealed that a “substantial proportion of patients” with lung cancers are non-smokers.
The study’s findings emphasise that lung cancer in Southeast Asia, particularly in India, stands apart from cases in other regions. The genetic makeup of lung cancer in India is “shaped by the intricate diversity of its people,” the researchers said. India ranks as Asia’s second-highest contributor to lung disease, with an alarming 72,510 cancer cases and 66,279 deaths recorded in 2020, according to the study.
What are the reasons behind lung cancer cases in non-smokers? Let’s delve into the details. Air pollution The study lists the rising air pollution among the major risk factors for lung cancer in non-smokers. India, one of the world’s most polluted countries, has seen New Delhi ranked as the most polluted capital city globally for four consecutive years starting in 2018.
Long-term exposure to particulate matter (PM) 2.5, asbestos, chromium, cadmium, arsenic, coal, and second-hand smoke at home significantly increases the risk .