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Warning Signs of Cancer

By

The Manual's Editorial Staff

Last full review/revision Jul 2021| Content last modified Jul 2021
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Some symptoms can be warning signs of cancer. Most of the time, people who have these symptoms don’t have cancer. But because cancer is more likely to be cured if doctors find it early, it's important to tell your doctor if you have any warning signs.

What are the warning signs of cancer?

Go to a doctor if you have these warning signs of cancer—treatment works best when started early:

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Swelling
Swelling is a condition caused by excess fluid in the tissues. The fluid involved in swelling is primarily water. Swelling may occur in one or several parts of the body, often the feet and lower legs. Swelling that occurs throughout the body has different causes than swelling in a single limb or part of a limb. Which of the following is a frequent cause of swelling in a single limb or part of a limb?
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