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Pope Leo’s lung cancer diagnosis puts the spotlight on lung adenocarcinoma. Photo: AFP
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Firstpost•15-10-2026, 11:48
Can Non-Smokers Get Lung Cancer? What Pope Leo's Diagnosis Tells Us
  • •Pope Leo XIV's recent lung adenocarcinoma diagnosis highlights that lung cancer can affect individuals who have never smoked.
  • •Medical experts emphasize that while smoking is the leading cause, it accounts for only a portion of cases, challenging the misconception that non-smokers have zero risk.
  • •Key environmental and biological risk factors for non-smokers include air pollution, second-hand smoke, radon, workplace carcinogens, and genetic factors.
  • •Lung adenocarcinoma is the most common type of lung cancer found in non-smokers and often develops in the outer areas of the lungs without early symptoms.
  • •Persistent symptoms like a lingering cough, breathlessness, or chest discomfort should be medically evaluated regardless of smoking history.

Key Questions Answered

Yes, non-smokers can develop lung cancer, which challenges the misconception that the disease exclusively affects smokers. According to the US CDC, about 10 to 20 percent of lung cancers occur in individuals who have never smoked or have smoked fewer than 100 cigarettes in their lifetime.

Lung adenocarcinoma is a type of non-small cell lung cancer that develops in the glandular cells of the lungs, including mucus-producing cells. It is the most common subtype of lung cancer and is frequently diagnosed in people who have never smoked.

Non-smokers can develop lung cancer due to various environmental and biological factors, including long-term exposure to fine particulate air pollution, second-hand smoke, radon gas, workplace carcinogens, and inherited or acquired genetic changes.