Скачать или смотреть Smoking and Lung Cancer; How Smoking Causes Lung Cancer, Types of Lung Cancer Linked to Smoking

Smoking and Lung Cancer are deeply intertwined, with smoking being the leading cause of lung cancer worldwide. According to the World Health Organization, about 85% of lung cancer cases are directly linked to tobacco use. But the story doesn’t end there—let’s unpack the science and the impact.

🔬 How Smoking Causes Lung Cancer
DNA Damage: Tobacco smoke contains over 7,000 chemicals, including 70+ known carcinogens. These chemicals damage the DNA in lung cells, disrupting normal cell growth and repair.

Chronic Inflammation: Smoking causes persistent irritation and inflammation in the lungs, creating an environment ripe for cancer development.

Impaired Immune Response: It weakens the body’s ability to detect and destroy abnormal cells.

🧬 Types of Lung Cancer Linked to Smoking
Type Description
Small Cell Lung Cancer (SCLC) Highly aggressive; almost exclusively found in smokers
Non-Small Cell Lung Cancer (NSCLC) Includes adenocarcinoma, squamous cell carcinoma, and large cell carcinoma
Even though NSCLC is more common overall, SCLC is more tightly associated with heavy smoking.

🫁 Symptoms to Watch For
Persistent cough

Chest pain

Shortness of breath

Coughing up blood

Unexplained weight loss

Frequent lung infections

These symptoms often appear late, which is why early screening is crucial for smokers and former smokers.

🚫 Secondhand Smoke & Non-Smokers
Shockingly, up to 25% of lung cancer cases occur in people who have never smoked4. Secondhand smoke, air pollution, radon gas, and occupational exposures (like asbestos) are major culprits1.

✅ Benefits of Quitting Smoking
Reduces lung cancer risk by 30–50% within 10 years of quitting

Improves lung function and overall health

Lowers risk of other cancers, heart disease, and stroke

#Smoking #LungCancer