Melanoma: A Patient’s Guide
Who Develops Melanoma?

It is clear that the ultraviolet rays from the sun play a key role in the development of melanoma. People who have had 3 or more severe sunburns as a child or adolescent are at greater risk for developing melanoma. Any one exposed to large amounts of sunlight such as those who work outdoors or who live in areas where the sunlight is strong like the sunbelt states are at higher risk. People with fair skin who tend to burn rather than tan, have red or blond hair, and persons with 20 or more moles have a higher risk for developing melanoma. In general, the more moles you have, the higher your potential risk for melanoma.

The term dysplatic nevi is used to describe unusual moles. These moles are often asymmetrical, that is one half doesn't match the other, have irregular borders, are multiple colors, and larger than 6mm, the size of a pencil eraser. Also, people with dysplastic nevi often have many moles. People with dysplastic nevi are more at risk for developing melanoma. Those who have dysplastic nevi and a family history of melanoma have more than a 50% risk of developing melanoma by the age of 60. Genetic factors may be an important component of the predisposition to this type of cancer. Although not common about 10% of all melanomas are due to a familial melanoma gene called 9p21. In the near future there may be a test available to see if the gene is present.

What are the types of melanoma?

Melanoma - A Guide For Patients

Cancer Care Information