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How does cancer happen?

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Cancer happens when normal cells start to grow and multiply faster than normal. 

• As the cells multiply, they form a mass called a tumor. • Tumors are cancerous only if they invade neighboring tissues (especially lymph nodes) because of their uncontrolled growth. (This is called a malignant tumor.) • Tumors may also travel to other organs through the bloodstream. This is called metastasis. • Tumors overwhelm nearby tissues by invading their space and taking the oxygen and nutrients they need to survive and work right.


From: Skin Cancer WebMD Medical Reference

SOURCES: News release, Mela Sciences. National Cancer Institute. American Cancer Society.

Skin Cancer from eMedicineHealth

FDA

Reviewed by Stephanie S. Gardner on September 30, 2016

SOURCES: News release, Mela Sciences. National Cancer Institute. American Cancer Society.

Skin Cancer from eMedicineHealth

FDA

Reviewed by Stephanie S. Gardner on September 30, 2016

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What are the different types of skin cancers?

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