Lung Cancer: Causes, Symptoms and Prevention

Lung cancer is one of the leading causes of cancer-related deaths globally, but early detection and timely treatment can save lives. This article provides key insights into the causes, symptoms, and prevention of lung cancer, emphasizing the importance of early screening to improve outcomes.

What Causes Lung Cancer?

Lung cancer develops when cells in the lungs grow uncontrollably. Several risk factors contribute to its development, including:

• Smoking: Tobacco use is the leading cause, accounting for nearly 85% of cases.
• Secondhand Smoke: Prolonged exposure to smoke from others significantly increases risk.
• Environmental Factors: Exposure to radon gas, asbestos, or air pollution can contribute to lung cancer.
• Genetic Predisposition: A family history of lung cancer elevates susceptibility.

Early Symptoms to Watch For

Lung cancer symptoms often go unnoticed in the early stages, but being vigilant can make a difference:

• Chronic Cough: Persistent cough that doesn’t go away.
• Chest Pain: Pain or discomfort, especially during deep breaths or coughing.
• Breathing Changes: Shortness of breath or wheezing.
• Unexplained Weight Loss and Fatigue: Sudden weight loss or feeling tired without reason.
• Hoarseness: A change in your voice lasting more than a few weeks.

Symptom Variations by Type:

• Non-Small Cell Lung Cancer (NSCLC): Symptoms often develop gradually and include coughing up blood and chest discomfort.
• Small Cell Lung Cancer (SCLC): Rapidly progresses and may include facial swelling and difficulty swallowing.

Why Early Detection is Critical

Lung cancer is most treatable when diagnosed early, with survival rates varying by stage:

• Stage I: Over 70% survival rate.
• Stage II: Drops to 50%.
• Stage III: Around 30%.
• Stage IV: Rarely curable but treatable to extend life.

Screening with low-dose CT scans (LDCT) has been shown to reduce lung cancer mortality by detecting it early, even before symptoms arise.

【Data source: https://www.bmj.com/content/4/5678/260.abstract】

How to Prevent Lung Cancer

Routine Screenings:

• If you’re a current or former smoker aged 50-80, annual LDCT screenings can detect lung cancer early.

Lifestyle Changes:

• Quit Smoking: Reduces your risk dramatically, no matter how long you’ve smoked.
• Avoid Secondhand Smoke: Stay away from smoking environments.
• Maintain Clean Air: Reduce exposure to radon and other harmful substances in your home and workplace.
• Healthy Diet and Exercise: A balanced diet and regular physical activity can strengthen your overall health.

Take Action Today

Lung cancer doesn’t have to define your future. With proactive screenings and healthier lifestyle choices, it’s possible to prevent and treat this disease effectively.

If you’re at risk or experiencing symptoms, don’t wait—schedule a low-dose CT scan today. Early detection saves lives.

Your Health Starts Here

Lung cancer is highly treatable when detected early. Don’t wait for symptoms to worsen—early screening and lifestyle changes can prevent and treat lung cancer effectively. If you’re at risk or over the age of 55, talk to your healthcare provider about LDCT screenings.