Lung cancer
Lung cancer is the uncontrolled growth of abnormal cells in one or both lungs, often interfering with respiratory function. It is a leading cause of cancer-related deaths worldwide and requires early detection for the best outcomes.
Overview
Lung cancer is the uncontrolled growth of abnormal cells in one or both lungs, often interfering with respiratory function. It is a leading cause of cancer-related deaths worldwide and requires early detection for the best outcomes.
Symptoms
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Causes
- •Genetic mutations in lung cells
- •Inhalation of carcinogens
- •Radon gas exposure
- •Long-term tobacco use
Risk factors
- •Active smoking or history of smoking
- •Secondhand smoke exposure
- •Occupational exposure to asbestos
- •Family history of lung cancer
How it progresses
3 stages- Stage 1 — EarlyMild or intermittent symptoms; easily mistaken for something minor.Often missed
- Stage 2 — ProgressiveSymptoms become more frequent or severe.
- Stage 3 — EstablishedDaily life affected; medical care strongly recommended.
How it's diagnosed
- •Chest X-ray or CT scan
- •Sputum cytology
- •Tissue biopsy
- •PET scan for staging
Treatment options
General educational information only — no dosage advice. Always follow guidance from a qualified clinician.
- •Surgical removal of tumors
- •Chemotherapy
- •Radiation therapy
- •Targeted drug therapy
- •Immunotherapy
- •Smoking cessation support
- •Nutritional supplementation
- •Breathing exercises
- •Pain management routines
Complications
- •Long-term damage if untreated
- •Reduced quality of life
- •Worsening symptoms over time
- •Recurrence of lung cancer
Prevention
- •Maintain a healthy lifestyle
- •See a clinician for routine check-ups
When to seek help
- •Symptoms persist beyond a few days
- •Symptoms interfere with daily activities
- •New or worsening symptoms appear
- •Concerning changes related to lung cancer
- Coughing up blood (hemoptysis)
- Sudden unexplained weight loss
- Severe chest pain
- New or worsening shortness of breath
In any emergency, call your local emergency number or go to the nearest emergency department.
Real-world questions
- ›Can Lung cancer cause headaches?
- ›Is Lung cancer reversible?
- ›How quickly does Lung cancer progress?
- ›Is Lung cancer hereditary?
- ›Can Lung cancer be prevented?
Explore related symptoms
Frequently asked questions
Possible causes of Lung cancer include Genetic mutations in lung cells, Inhalation of carcinogens, Radon gas exposure, Long-term tobacco use.
Lung cancer can be serious and may require prompt medical attention, especially if symptoms are severe or worsening.
Duration varies between individuals. Many cases improve with appropriate care, while others may persist longer and require ongoing management.
Lung cancer typically benefits from medical evaluation and should not be ignored.
Consider seeing a clinician if symptoms are severe, persistent, worsening, or if you have any concerns related to general.
Sources
Information based on general medical references such as:
Last reviewed: May 2026