Lung Cancer: Causes, Symptoms, and Treatments

Causes of Lung Cancer

Lung cancer primarily develops due to genetic mutations in lung cells, often triggered by environmental and lifestyle factors. Common causes include:

1. Smoking – The leading cause, responsible for about 85% of cases. Tobacco smoke contains carcinogens that damage lung tissue.
2. Secondhand Smoke – Non-smokers exposed to cigarette smoke are also at risk.
3. Radon Gas – A naturally occurring radioactive gas that can accumulate in homes and buildings.
4. Asbestos and Other Carcinogens – Workplace exposure to asbestos, arsenic, diesel fumes, and other chemicals increases the risk.
5. Air Pollution – Long-term exposure to polluted air can contribute to lung cancer.
6. Genetic Factors – A family history of lung cancer may increase susceptibility.

Symptoms of Lung Cancer

Lung cancer symptoms often appear in later stages and may include:

1. Persistent Cough (that worsens over time)
2. Coughing Up Blood (hemoptysis)
3. Shortness of Breath
4. Chest Pain (especially when breathing deeply, coughing, or laughing)
5. Unexplained Weight Loss
6. Fatigue and Weakness
7. Hoarseness
8. Recurrent Lung Infections (pneumonia or bronchitis)
9. Bone Pain (if the cancer has spread)

Treatments for Lung Cancer

Treatment depends on the type (non-small cell lung cancer [NSCLC] or small cell lung cancer [SCLC]), stage, and overall health. Options include:

1. Surgery – Removes tumors if cancer is localized.
2. Radiation Therapy – Uses high-energy rays to kill cancer cells.
3. Chemotherapy – Uses drugs to kill or slow cancer growth, especially in advanced cases.
4. Targeted Therapy – Attacks specific genetic mutations in cancer cells (e.g., EGFR inhibitors).
5. Immunotherapy – Helps the immune system recognize and attack cancer cells.
6. Palliative Care – Focuses on symptom relief and improving quality of life, especially for advanced stages.

Early detection through screening (e.g., low-dose CT scans for high-risk individuals) significantly improves treatment outcomes.