There are three basic types of skin cancer. Two of them, basal cell carcinoma and squamous cell carcinoma, are the most common and least dangerous.

But melanoma, which makes up just 3 percent of skin cancer cases, is responsible for more than 75 percent of skin cancer deaths, according to the American Cancer Society.

It's also the most common form of skin cancer among young adults and the second-most common among adolescents -- though like most skin cancers, it is highly treatable if detected early.

Dermatologists say the easiest way to identify possible melanoma is to use the ABCDE danger signs:

• Look for any spot or sore on the skin that is Asymmetrical.

• Look for an irregular or poorly defined Border on the spot.

• Another sign is Color variation on the skin. Colors can range anywhere from red, white, blue to black, tan and brown.

• Carefully inspect the Diameter of the spots. Melanomas are usually larger than a pencil eraser. It's also important to note any new moles, especially if they itch or bleed.

• If the spot Evolves or changes in any way, it's essential to see a doctor.

The typical characteristics associated with basal cell carcinoma are shiny bumps or nodules that are translucent, as well as open sores that bleed or ooze and remain open for three or more weeks.

Patients with squamous cell carcinoma typically have a wartlike growth that occasionally bleeds and crusts, or a persistent, scaly red patch with irregular borders.

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