SKIN CANCER

Skin cancer is a disease in which skin cells lose the ability to divide and grow normally. Healthy skin cells normally divide in an orderly way to replace dead cells and grow new skin. Abnormal cells can grow out of control and form a mass or 'tumor'. When abnormal cells originate in the skin, the mass is called a skin tumor.

A skin tumor is considered benign if it is limited to a few cell layers and does not invade surrounding tissues or organs. But if the tumor spreads to surrounding tissues it is considered malignant or cancerous.

Cancer cells crowd out and destroy nearby healthy cells forming growths called malignant tumors.

Most skin growths, however, are non-malignant, benign (not harmful) tumors.

• Some forms of skin cancer also metastasize. That is, they spread to other parts of the body and start new tumors.
• Skin cancer that spreads to vital organs like the brain or liver can be life threatening.

The skin, which is the human body's largest organ, has several functions. It prevents the body from losing water and other fluid, stores fat, cools the body when sweat evaporates, and makes vitamin D. The skin also protects the body from infection, light, and injury.

A tumor is considered benign (not cancerous) if it is limited to a few cell layers and does not invade surrounding tissues or organs. But if the tumor spreads - or has the potential to spread - to surrounding tissues or organs, it is considered malignant, or cancerous.

Cancer (malignant growths) occur when:

• Some cells in the body begin to multiply in an uncontrolled manner.
• The body's natural defenses, such as certain parts of the immune system, cannot stop uncontrolled cell division.
• These abnormal cells become greater and greater in number.

Symptoms Of Skin Cancer

The most common symptoms are:

1. A new growth on the skin.

2. A change in an existing skin growth.

3. A sore that does not heal.

Not all changes in the skin are symptoms of skin cancer. Most moles and other growths are harmless and do not need to be removed. Moles that are unattractive, or in areas where they are constantly irritated by clothing, can be removed by a doctor.