DEAR DOCTOR K: My aunt developed the skin cancer called melanoma, and I hear that this cancer can run in families. What should I look for when I examine my skin for melanoma?
DEAR READER: Skin cancers are the most common cancers in the United States, and skin checks are an important way to identify them. You asked about the deadliest type of skin cancer, melanoma. My Harvard Medical School colleague, dermatologist Dr. Kenneth Arndt, says that more than half of melanomas are identified by patients, either alone or with the help of a partner. That's important because more than 90 percent of cases can be cured with early detection and treatment. Skin carries out many functions that help maintain health. It forms a defensive barrier, protecting inner organs from foreign invaders such as bacteria and viruses.