How Is Skin Cancer Diagnosed? Tests and Screenings, Early Diagnosis, and Your Doctors

It’s important to spotskin cancerin its beginning stages when it’s easier to treat.

Mostskin cancersthat are diagnosed early have a five-year survival rate of 99 percent or higher, according to the Skin Cancer Foundation (SCF). (1) This includesmelanoma,这是the deadliest type, per the SCF. (2)

Getting an early diagnosis requires you to see your doctor regularly and to schedule an appointment whenever you notice an unusual looking spot.

If your physician thinks the lesion looks suspicious, certain tests and procedures may be done to see if it’s cancerous, notes theCancer TreatmentCenters of America. (3)

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Doctors will usually first perform a visual exam to check for skin cancer. They’ll assess the size, shape, color, and texture of the spots on your skin.

You may also be asked about any symptoms you have and your family history of skin cancer.

If you’re seeing your primary care physician, you might be referred to a dermatologist who specializes in skin diseases.

Dermatologists often use special microscopes, magnifying lenses, or other tools to examine a spot more closely. This process is called a dermatoscopy.

Your doctor might also feel your lymph nodes to see if they’re enlarged. (3)

Biopsies

If a lesion looks suspicious, your doctor will probably perform a skin biopsy to remove a sample of the tissue and test it for cancer. A biopsy typically leaves a small scar, but this will depend on the size of the lesion and the method used.

After your doctor performs the biopsy, samples are sent to a lab for a pathologist to analyze under a microscope.

The American Cancer Society (ACS) says there are different types ofbiopsiesfor skin cancer, including: (4)

• Shave (Tangential) BiopsyYour doctor shaves off the top layers of the skin with a small surgical blade. Then an ointment, chemical, or electrical current is applied to stop the bleeding.
• Punch BiopsyWith this type, a tool that looks like a round cookie cutter is used to remove a deeper sample of skin. Your doctor will rotate the tool on the skin until it cuts through all of the layers needed. The sample is taken out and the skin may be stitched back together.
• Excisional BiopsyThe entire tumor is removed with a surgical knife that cuts through the full thickness of the skin. The edges of the skin are usually stitched back together.
• Incisional BiopsyOnly a portion of the tumor is removed with a surgical knife. Stitches may be used to close up the edges.
• Lymph Node BiopsyIf your doctor suspects that the cancer has spread to your lymph nodes, a lymph node biopsy may be performed. With this procedure, parts or all of a lymph node may be removed to test for cancer.

Imaging Tests

Imaging tests are sometimes used if doctors suspect skin cancer has spread to other areas of the body. The ACS says these may include: (5)

• A chestX-ray
• Ultrasound
• Computerized tomography (CT) scan
• Magnetic resonance imaging (MRI)
• Positron emission tomography (PET) scan

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Some newer devices allow doctors to spot problematic skin lesions.

One approach, called reflectance confocal microscopy (RCM), uses a low-power laser to scan skin lesions and provide important clues about whether they’re cancerous or not. RCM is sometimes used in combination with another method called optical coherence tomography (OCT), notes the Memorial Sloan Kettering Cancer Center. (6)

3D total body photography is another new technology that’s used to track changes in the appearance of moles or lesions in people at risk for melanoma. Dozens of digital cameras snap pictures of patients simultaneously. Then a computer creates a 3D avatar to show all the lesions on an individual’s body, so doctors can inspect them further. (6)

detecti皮肤癌的应用也越来越受欢迎on devices. These apps, available via most smartphones, claim to assess skin changes and help people decide whether they should see their dermatologist. While they can be helpful at promoting awareness, the accuracy of these programs is questionable. One recent study found the most accurate skin cancer detection app missed nearly 30 percent of melanomas, per the Roswell Park Comprehensive Cancer Center. (7)

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Once you get a skincancer diagnosis, your doctor will want tostagethe disease. Staging is a way to describe the extent of the cancer in your body.

Imaging tests and lymph node biopsies are often done to see if cancer has spread.

Skin cancer is staged using the number 1 through 4. Stage 1 cancers are small and only present in the area they start. Stage 4 skin cancers are the most serious and have spread to other areas of the body.

Knowing your cancer’s stage can help your doctor recommend treatment options and better predict your prognosis, according to the Mayo Clinic. (8)

Though many organizations promote regular total body skin checks, the Centers for Disease Control and Prevention (CDC) notes that the U.S. Preventive Services Task Force has concluded that there’s not enough evidence to recommend for or against routine screening to detect skin cancers early. (9)

However, skin checksarerecommended for people with a history of skin cancer or those who have any suspicious-looking lesions or moles.

Additionally, the CDC says you may want to talk to your doctor if you have certainrisk factorsfor skin cancer, such as: (10)

• Light skin
• Skin that burns, freckles, or reddens easily
• Blonde or red hair
• Blue or green eyes
• A large number of moles
• A personal or family history of skin cancer
• Older age
• A weakened immune system
• Certain disorders that increase your risk for skin cancer

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You should be on the lookout for any unusual spots on your skin. One study found more than 40 percent of melanomas are discovered by patients themselves, according to the American Cancer Society (ACS). (11)

Regular self-exams can help you spot new growths or changes. Many doctors recommend performing these checks once a month.

It’s best to examine your skin in a well-lit room in front of a full-length mirror. You can use a handheld mirror for harder-to-see areas, like the back of your thighs.

Be sure to look at all areas of your skin, including your palms, soles, ears, scalp, nails, and your back. If you can’t see these spots, ask a family member or friend to help you.

Look for any lesions that are new or have changed in size, shape, color, or texture. Any sore, lump, or blemish that looks or feels unusual may also be a warning sign. Some skin cancers may appear as red, scaly, crusty, or swollen, and they may ooze or bleed. They can be painful, itchy, or tender.

According to SkinCancer.net, signs of melanoma may include a spot that: (12)

• Is asymmetrical (one side doesn’t match the other)
• Has an irregular, blurred, or ragged border
• Includes different shades of brown or black, or sometimes patches of pink, red, white, or blue
• Is larger than 6 millimeters in diameter
• Changes in shape, size, or color

Why Is an Early Diagnosis Important?

Skin cancer is the most commontype of cancerthat affects Americans. One in five people in the United States will develop some type of skin cancer by the time they reach age 70. (2)

The good news is early detection of all types of skin cancers, including basal cell carcinoma,squamous cell carcinoma, and melanoma, can greatly improve your chances of being cured.

Additionally, catching a skin cancer early on could make treatments easier. Smaller, simpler lesions are easier to remove surgically and less likely to result in scarring or disfigurement.

It’s important to pay attention to new or changing skin spots and see your doctor if you notice anything out of the ordinary, notes the ACS. (13)