Overview, Causes, & Risk Factors
Basal cell cancer occurs when skin cells undergo cancerous changes.
Over 500,000 people a year in the U.S. are affected by basal cell carcinoma. Basal cell cancer begins in cells that have been damaged by exposure to the sun over many years. That is why most of these cancers occur on the head or neck. Middle-aged or older persons and those people who work outside are the most likely to develop these cancers. Damage by sunburn over and over again can cause skin cells to lose their ability to repair themselves. Cancer develops when the damage causes the cells to grow and divide abnormally. These cancerous cells can become tumors and will damage the skin around them.
Exposure to the sun over many years is the cause of basal cell cancer. The more often a person is exposed to the sun, the more likely it is that later in life an area of basal cell cancer will develop.
Basal cell cancer may start as a well-defined area of the skin that changes color. These areas may appear and then grow rapidly. The coloration and shape of the basal cell carcinoma can vary considerably. It may be hard to tell if a spot on the skin is basal cell cancer, another kind of skin cancer, or a normal mole. Sometimes an area of basal cell cancer looks like a scar.
A person notices an unusual spot or bump on the skin. This area may grow, change colors, itch, or otherwise make the person suspect that there is a problem. A doctor must remove the area and have it examined to confirm that it is basal cell cancer. The following changes in an area of skin should be checked by a doctor:
Avoiding exposure to the sun is very important. Spending less time in the sun will greatly lower a person’s chances of developing basal cell cancer. When exposure to the sun can’t be avoided, a person should use protective sunscreens. However, sometimes people spend more time in the sun when they are using sunscreen. It is important not to spend too much time in the sun whether the skin is protected or not.
If basal cell cancer is not treated, it will destroy the skin around it. It can destroy underlying tissue as well. Basal cell cancer generally only affects the tissue and structures around it. It doesn’t usually spread through the blood to other areas of the body. As with any cancer, early detection is important.
There are no risks to others from those who have basal cell cancer. It cannot be spread from one person to another.
Basal cell cancer is treated with simple surgery. All of the cancerous tissue and a small amount of surrounding tissue are removed. Most of the time, this cures the cancer completely. The affected area can also be frozen with substances such as liquid nitrogen. Freezing the basal cell cancer will kill it. Sometimes, medicine such as fluorouracil can be applied to the area to kill the cancer. If the basal cell cancer comes back, any of these methods can be used again. Many times, though, surgery will be used to treat basal cell cancer that has come back.
A person usually recovers from surgery without any complications. There is usually only minor discomfort as the skin heals.
Someone who has had one basal cell cancer is likely to develop more in the future. A person should watch for any new skin lesions that may develop. That person should also monitor any area where basal cell cancer has been removed. Any new lesions or changes in the treated area should be reported to a healthcare provider.
The treated area will be followed closely for any signs of regrowth of the cancer. A healthcare provider or dermatologist will do this. The person should also check the area often and report any new or worsening symptoms.