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What Is Cancer: Causes, Symptoms, Types, Treatment & More

Let’s explore what cancer is, along with its causes, treatment methods, warning signs, the many types of cancer and more.

In This Article:

  • Cancer is caused by an uncontrolled growth of cells in the body. The most commonly affected organs are the breast, lung, colon, prostate and skin. Everyone can get cancer, but risk increases with obesity, smoking and age. 
  • Treatment methods become more effective every year and include surgery, chemotherapy, radiation and immunotherapy.  
  • You should be screened for certain types of cancer every one to three years, but visit your doctor immediately if you have unexplained, persistent weight loss or pain — or if you find a lump. 

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