The single most consistent factors linked to melanoma risk are: excessive sun exposure (especially during childhood and adolescence) in fair-skinned individuals, a prior personal history of melanoma, a strong family history of melanoma, and the presence of atypical moles (nevi). The other factors that you cite in your question are not, at the present time, considered to be clinically significant risk factors for melanoma.
As for the melanoma on your breast, you can certainly elect to have it removed, although this would not be mandatory unless it has clinically suspicious features, or it is enlarging or otherwise changing.
Sincerely/ Robert A. Wascher, MD, FACS
http://doctorwascher.com
DISCLAIMER:
"Ask a Doctor" questions are answered by certified physicians and other medical professionals who volunteer
their time on eHealth Forum.
For more information about experts participating in the "Ask a Doctor" Network, please visit our
medical experts page.
You may also visit our Skin Cancer , for moderated patient to patient support and information.
The information provided on eHealth Forum is designed to improve, not replace, the relationship between a patient and his/her own physician.
Personal consultation(s) with a qualified medical professional is the proper means for diagnosing any medical condition.