Skin Cancer

Skin Cancer

Skin cancer, which is the most common form of cancer in the United States, is the result of the abnormal growth of skin cells. Cancer can affect skin anywhere on the body, but most frequently appears on skin that is exposed to the sun. There are more than a million new cases of skin cancer in the United States each year.

Causes Of Skin Cancer

Every day, skin cells die and new ones form to replace them in a process controlled by DNA. Skin cancer can form when this process does not work properly because of damage to DNA. New cells may form when they are not needed, or older cells may not die, both of which can cause a growth of tissue known as a tumor. DNA damage is often a result of ultraviolet radiation from sunlight or tanning lamps. In some cases, skin cancer affects areas of the skin that have not been exposed to the sun. Certain factors, such as fair skin, moles, a weakened immune system, heredity and age, also increase the risk of skin cancer.

Types of Skin Cancer

There are three major types of skin cancer, and they affect different layers of the skin. They are named for the different types of skin cells that become cancerous.

Basal Cell Carcinoma

Basal cell skin cancer occurs in the basal cell layer of the skin and is the most common type of skin cancer in people with fair skin. It commonly occurs on areas of the skin that have been exposed to the sun, such as the face. It rarely spreads to other parts of the body.

Squamous Cell Carcinoma

Squamous cell carcinoma occurs in the squamous cells, and is the most common type of skin cancer in people with dark skin, who typically get it in places, such as the legs or feet, that have not been exposed to the sun. In people with fair skin, it usually occurs in sun-exposed areas such as on the face, head, ears and neck. Squamous cell skin cancer can spread to other parts of the body.

Melanoma

Melanoma is the most aggressive type of cancer, and the most likely to spread to other parts of the body. Melanoma occurs in the melanocyte (pigment) cells of the skin, and can form on any part of the body, regardless of past sun exposure.

Symptoms of Skin Cancer

Skin cancer is often identified as a new or changed growth on the skin of the scalp, face, lips, ears, neck, chest, arms, hands or legs. Although these are common areas for skin-cancer growths to form, they can occur anywhere, and manifest themselves as the following:

  • Pearly or waxy bump
  • Flesh-colored or brown scar-like lesion
  • Firm, red nodule
  • Crusted, flat lesion
  • Large brown spot with darker speckles
  • Shiny, firm bumps

A mole that changes shape or color can also indicate skin cancer.

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Morris Dermatology

1499 Lakewood Drive
Unit A
Morris, IL 60450

815.941.5160

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Joliet Dermatology

823 129th Infantry Drive
Space 105
Joliet, IL 60435

815.666.1742

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