Human Biology

(Sean Pound) #1

1.56. Cancer http://www.ck12.org


FIGURE 1.113
The mutations that cause cancer may oc-
cur when people are exposed to chemical
carcinogens, such as those in cigarettes.

of cancer. Having warning signs does not mean that you have cancer. However, you should see a doctor to be sure.
Everyone should know the warning signs of cancer. Detecting and treating cancer early can often lead to a cure.
Some warning signs of cancer include:



  • Change in bowel or bladder habits.

  • Sores that do not heal.

  • Unusual bleeding or discharge.

  • Lump in the breast or elsewhere.

  • Chronic indigestion.

  • Difficulty swallowing.

  • Obvious changes in a wart or mole.

  • Persistent cough or hoarseness.

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