Cancer

By : Alex Nelson

What is cancer?

Cancerous cells divide rapidly and become less dependent on signals from other cells.

How are cancer cells different from normal cells?

Normal cells only reproduce when they are needed. Caner cells don't stop growing and dividing when there are already enough of them. Eventually they keep doubling, forming a tumor.

Comparing healthy cells to cancer cells

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The Basics of Cancer

Cancer Cells - The Basics | Part Only

What are tumors? How do they form?

What are tumors? How do they form?

A tumor is a part of the body that swells up caused by cells. They are formed when the cells continue to replicate rapidly, forming lumps that are called tumors.
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Lung Cancer

Description

Lung cancer is the uncontrolled growth of cells that start of in one or both lungs. These cells divide rapidly and form tumors. About 90% of lung cancer is caused by the use of tobacco.

How common?

Lung cancer is the most common cancer for men and the fifth most common cancer for women.

Symptoms

Some symptoms of lung cancer are pain in the chest or ribs, wheezing, fatigue, loss of appetite, weight loss, and coughing up blood.

Treatments

Treatments may be surgery, chemotherapy, radiation, or a combination of these.

Outcomes

Almost 20 out of 100 people diagnosed will survive 5 years or more.