Of all the skin cancers, melanoma is the one that scares doctors and patients the most.
Luckily, there are now several options for treatment should you be diagnosed with this aggressive, sometimes deadly, cancer.
Melanoma affects over 1 million Americans, and its rates have risen significantly in the past 30 years, according to the American Academy of Dermatology (AAD).
Here, experts explore what melanoma is, along with its causes, risk factors and key symptoms. Plus, you'll learn about melanoma's stages, types and treatments.
What is melanoma?
The American Cancer Society (ACS) explains that cancer occurs when cells begin to grow out of control. Melanoma is a type of cancer that starts in the pigment-making cells, known as "melanocytes." While not as common as other forms of skin cancer, it is more serious.
"Melanoma is more aggressive and more likely to spread to the lymph nodes,"said Dr. Hugh Greenway, a dermatologic surgeon with Scripps MD Anderson Cancer Center and Scripps Clinic in California. "It'll spread to the liver, to the brain and throughout the body if not checked."
According to the AAD, ultraviolet light from the sun or tanning beds is the cause of melanoma.
Risk factors include:
To reduce these risks, Greenway recommended wearing sunglasses, a wide-brimmed hat and using a water-resistant sunscreen that protects against both UVB and UVA light when out in the sun.
"I tell my patients here at Scripps between a 30 to 50 [SPF sunscreen] is fine,"he advised.
Melanoma types
The Skin Cancer Foundation lists four main types of melanoma:
Melanoma symptoms
So, what does melanoma look like?
Scripps MD Anderson Cancer Center says to be on the lookout for irregular-looking spots on your skin, new spots or ones that change size, shape or color.
Other melanoma symptoms may include:
To help you identify a melanoma, Greenway suggests the A-B-C-D-E rule.
"'A' stands for asymmetry,"he explained. If you draw a line down the middle of a melanoma spot or mole, one half won't typically match the other.
The "B" is borders that aren't regular. "That one [mole] that's got a lot of outcropping and things, we say that's a little irregular,"he noted.
"C" stands for color. "All of a sudden if you've got a mole that's got a lot of blacks in it, reds, different colors, that could be a sign that mole's a problem. 'D' is just for being different, and 'E' is for a mole that's sort of starting to evolve and change a little bit."
He advised that itchy moles or ones you're suddenly aware of could be early signs of melanoma, while bleeding moles may indicate more advanced stages of the disease.
Stages of melanoma
According to the ACS, the stages of melanoma are:
Melanoma treatments
Scripps states that melanoma treatments include:
One study published recently in the journal Cancer Discovery found that certain mRNA vaccines combined with immunotherapy helped reduce the risk of melanoma tumors returning, although more research is needed before this treatment is broadly available.
Early detection is also key to better melanoma outcomes, according to Greenway.
"You probably ought to have your skin checked once a year,"he recommended. "We know that if we can make the diagnosis [early], we can cure it with greater than 99% [cure rate] in most people."
