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.