Lung Cancer

What is Lung Cancer?
Lung cancer is a type of cancer that begins in the spongy organs in your chest that take in oxygen and release carbon dioxide.

Key Fact: It is the leading cause of cancer deaths worldwide for both men and women. However, massive advancements in targeted therapies and early screening are steadily improving survival rates.

Signs & Symptoms

Lung cancer typically doesn't cause signs and symptoms in its earliest stages. When symptoms do appear, they may include:

• A New Cough: A persistent cough that doesn't go away or worsens over time.
• Changes in a Chronic Cough: If you have a "smoker's cough," notice if it sounds deeper or produces more mucus.
• Shortness of Breath: Feeling winded easily or hearing a wheeze.
• Chest Pain: Pain that gets worse when you breathe deeply, laugh, or cough.
• Unexplained Weight Loss: Dropping pounds without trying.
• Bone Pain & Headaches: Signs that the cancer may have spread (metastasized) to other parts of the body.

⚠️ RED FLAG: COUGHING UP BLOOD
Coughing up blood (Hemoptysis), even a small amount or just rust-colored spit, is a major warning sign. See a doctor immediately. Do not wait to see if it clears up on its own.

The Two Main Types

Doctors divide lung cancer into two major categories based on how the cells look under a microscope. This determines your treatment plan.

Type	Prevalence	Details
Non-Small Cell Lung Cancer (NSCLC)	80% to 85% of cases	An umbrella term for several types, including squamous cell carcinoma, adenocarcinoma, and large cell carcinoma. It tends to grow and spread more slowly.
Small Cell Lung Cancer (SCLC)	10% to 15% of cases	Highly aggressive and grows rapidly. It occurs almost exclusively in heavy smokers and often spreads before symptoms are noticed.

Causes & Risk Factors

• Smoking: The undisputed leading cause. Cigarette smoke contains thousands of chemicals, dozens of which are known carcinogens. Your risk drops significantly the moment you quit, regardless of your age.
• Secondhand Smoke: Even if you don't smoke, inhaling others' smoke increases your risk.
• Radon Gas: The leading cause of lung cancer in non-smokers. Radon is a naturally occurring radioactive gas that can build up in homes. (You can buy a cheap radon test kit at most hardware stores.)
• Asbestos: Workplace exposure to asbestos fibers, especially for smokers, drastically multiplies the risk.

Screening & Diagnosis

ℹ️ LOW-DOSE CT SCREENING
If you are an older adult (50-80) with a history of heavy smoking, even if you quit within the last 15 years, ask your doctor about an annual Low-Dose CT (LDCT) scan. It can catch lung cancer in its early, curable stages.

To diagnose lung cancer, doctors use:

• Imaging: X-rays to look for abnormal masses, followed by CT scans to reveal small lesions.
• Sputum Cytology: Examining your phlegm under a microscope.
• Biopsy: Removing a small sample of the lung tissue (via a needle or a tube down the throat) to test for cancer cells and specific genetic mutations.

Modern Treatment Options

Lung cancer treatment has evolved rapidly. While surgery (removing a section or the entire lung), chemotherapy, and radiation are still standard, new therapies have changed the landscape:

• Targeted Drug Therapy: Drugs that focus on specific genetic mutations (like EGFR or ALK) inside the cancer cells, shutting down their ability to grow.
• Immunotherapy: Medications that help your own immune system recognize and destroy the cancer cells, which often try to "hide" from the body's natural defenses.

Disclaimer: The content provided on this blog is for informational purposes only and is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or oncologist regarding any medical condition.

Disclaimer: This content is for informational purposes only and does not constitute medical advice. No doctor-patient relationship is established. Always consult a qualified healthcare professional.

Author: Tariq
Reviewed & Sources: WHO, CDC, medical textbooks
Last Updated: