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Lung cancer occurs when abnormal cells in the lungs begin to grow uncontrollably. Over time, these cells can form tumors, interfere with normal breathing, and potentially spread to other parts of the body through the blood or lymphatic system.
Because the lungs are essential for oxygenating the body, any disruption in their function can have serious consequences.
There are two main types of lung cancer, and understanding the difference is key to diagnosis and treatment:
- Non-Small Cell Lung Cancer (NSCLC): This form of cancer is the most common type, making up about 80 to 85 percent of cases. It includes subtypes such as adenocarcinoma, squamous cell carcinoma, and large cell carcinoma. NSCLC typically grows and spreads more slowly than other forms.
- Small Cell Lung Cancer (SCLC): Accounting for 10 to 15 percent of cases, SCLC is less common but more aggressive. It tends to grow rapidly and often spreads to other parts of the body before it’s diagnosed.