Exercise 6

There are several conditions considered precursors of cancer of the skin—for example, burn scars, chronic skin ulcers, or inflammatory lesions that do not seem to heal. Such conditions are considered signs or symptoms of possible skin cancer and, therefore, are examined periodically.

Perhaps you have heard of instances where a wart or a mole became cancerous. The moles to be watched carefully are the dark brown or blue-black moles, slightly raised from the skin. These are particularly dangerous when they are located so that they are irritated by friction from a collar or belt, or when they are on the feet. Moles or warts that are irritated to show a tendency to change in color or size should be examined immediately by a physician.

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