What Causes Lung Tumors?
Pulmonary tumors specifically refer to lung cancer, as lung cancer accounts for the vast majority of pulmonary tumors. According to current evidence-based medical research, smoking is the primary known cause of lung cancer—smokers face a risk approximately 30 times higher than non-smokers. Below, we address the question: What causes pulmonary tumors?

What Causes Pulmonary Tumors?
1. Smoking
Smoking is a major risk factor for pulmonary tumor development. Cigarette smoke contains carcinogenic substances such as nicotine and tar, which significantly increase the likelihood of developing lung tumors.
2. Occupational Exposure
Certain occupations involving exposure to hazardous materials—such as asbestos or heavy metal ions—can contribute to pulmonary tumor formation.
3. Air Pollution
Long-term inhalation of toxic gases present in polluted air can lead to the development of malignant pulmonary tumors.
4. Deficiency of Trace Elements
Soil erosion and other environmental factors may lead to deficiencies in essential trace elements. Selenium deficiency, for example, is most commonly associated with increased risks of both pulmonary and gastrointestinal tumors.
5. Genetic Factors
A family history of lung cancer suggests a potential hereditary predisposition. Individuals with such a history should undergo regular health screenings to facilitate early diagnosis and timely treatment.
The above outlines the main causes of pulmonary tumors. We hope this information is helpful to you.