Basal Cell Carcinoma Is the Most Frequently Diagnosed Skin Cancer

Basal cell carcinoma (BCC) is the most common type of skin cancer by a significant margin. It accounts for roughly 80 percent of all skin cancer diagnoses. The condition starts in the basal cells, which are the round cells in the deepest layer of your epidermis — the outermost layer of skin. These cells constantly divide to create new skin cells that move upward and eventually shed.

BCC grows slowly and rarely spreads to other parts of your body, which is why it has an excellent outlook when caught and treated. However, it can grow deeper into the skin and underlying tissue if left untreated, potentially causing disfigurement or damage to nerves and blood vessels. The good news is that BCC is highly treatable, especially when found early.

Key Takeaways

  • Basal cell carcinoma accounts for about 80 percent of all skin cancer cases and grows slowly compared to other skin cancers.
  • BCC typically appears as a shiny bump, a scaly patch, or a sore that does not heal, usually on sun-exposed areas like the face, ears, and neck.
  • A dermatologist diagnoses BCC by examining the spot and performing a biopsy, which involves removing a small tissue sample to examine under a microscope.
  • Treatment options include surgical removal, freezing, topical creams, and laser therapy, depending on the size and location of the cancer.
  • Most people who have BCC treated do not experience recurrence, though some develop new BCC spots elsewhere on the skin over time.

How Basal Cell Carcinoma Develops

BCC develops when basal cells in your skin begin to grow abnormally. This almost always happens because of repeated or intense sun exposure over many years. Ultraviolet (UV) radiation from the sun damages the DNA inside skin cells, and when that damage accumulates, cells can become cancerous.

You do not need a severe sunburn to develop BCC. Regular, everyday sun exposure — even without obvious burns — can cause the damage that leads to this cancer. People with fair skin, light hair, and light eyes are at higher risk because they have less melanin, the pigment that provides some natural sun protection. However, BCC can develop in people with darker skin as well, though it is less common.

Other risk factors include a family history of skin cancer, a weakened immune system, exposure to certain chemicals, and previous radiation therapy. Age also matters: BCC is more common in people over 50, though it can occur at any age.

What Basal Cell Carcinoma Looks Like

BCC appears in several different forms, and knowing what to look for helps you catch it early. The most common appearance is a shiny, pearly bump or nodule, often with a rolled edge and a depression or ulcer in the center. This bump may bleed easily or have a crust that does not heal.

Another common form is a scaly, flat patch that may be red, pink, or brown. This type can look like a patch of dry skin or eczema and may itch or feel tender. A third form is a scar-like area that is pale or white and may feel firm to the touch.

BCC almost always appears on sun-exposed areas: the face, ears, scalp, neck, shoulders, and back. It rarely develops on areas that are usually covered by clothing. If you notice a spot that looks unusual, does not heal within a few weeks, or changes in size, shape, or color, that is a reason to see a doctor.

How Doctors Diagnose Basal Cell Carcinoma

A dermatologist — a doctor who specializes in skin conditions — diagnoses BCC by first examining the spot visually. They may use a magnifying tool called a dermatoscope to look more closely at the area. However, visual inspection alone cannot confirm BCC, so the doctor will perform a biopsy.

A biopsy involves removing a small sample of the suspicious skin tissue. The doctor may use a scalpel, a punch tool (which removes a circular sample), or a scraping technique, depending on the size and location of the spot. The procedure is done under local anesthesia, so you will feel pressure but not pain. The tissue sample is then sent to a laboratory where a pathologist examines it under a microscope to confirm whether it is BCC and, if so, what type and how deep it extends.

The biopsy results guide treatment decisions. Doctors classify BCC into different subtypes based on how the cancer cells look and behave under the microscope. Some types are more aggressive and more likely to recur, which affects which treatment your doctor recommends.

Treatment Options for Basal Cell Carcinoma

Treatment for BCC depends on the size, location, depth, and subtype of the cancer, as well as your overall health. The goal is to remove all the cancer cells while preserving as much healthy skin as possible and minimizing scarring.

Surgical excision is the most common treatment. The dermatologist removes the cancer and a margin of healthy skin around it, then closes the wound with stitches. This approach works well for most BCC cases and has a low recurrence rate. For very small lesions, a simpler procedure called curettage and electrodesiccation may be used: the doctor scrapes away the cancer with a curette (a sharp instrument) and then uses electrical current to destroy any remaining cancer cells.

Mohs micrographic surgery is a specialized technique used for larger cancers, cancers in cosmetically sensitive areas like the face, or cancers that have recurred. The surgeon removes the cancer layer by layer and examines each layer under a microscope in real time, ensuring all cancer cells are removed while preserving as much healthy tissue as possible.

Other options include cryotherapy (freezing the cancer with liquid nitrogen), topical chemotherapy creams (applied directly to the skin), photodynamic therapy (using light-activated medication), and laser therapy. Your dermatologist will discuss which option is best for your situation.

Recovery and Follow-Up After Treatment

Recovery depends on which treatment you received. After surgical removal, the wound will need to be kept clean and dry. Your doctor will give you specific instructions on wound care and when to return to have stitches removed, usually within one to two weeks. Some scarring is normal, though it often fades over time.

After other treatments like cryotherapy or topical creams, the treated area may be red, swollen, or scabbed for a few days to a few weeks. You should avoid sun exposure to the treated area during healing and follow your doctor's instructions on when you can resume normal activities.

Your dermatologist will schedule follow-up visits to monitor the treated area and check for new skin cancers. People who have had BCC are at higher risk of developing another BCC elsewhere on their skin, so regular skin checks — either self-examination or professional examination — are important. Many dermatologists recommend annual full-body skin checks for people with a history of BCC.

Preventing Future Basal Cell Carcinoma

Since sun exposure is the primary cause of BCC, sun protection is the most effective prevention strategy. This means wearing broad-spectrum sunscreen (SPF 30 or higher) every day, even on cloudy days, and reapplying it every two hours or after swimming. Wearing protective clothing — long sleeves, hats, and sunglasses — also helps, especially during peak sun hours (10 a.m. to 4 p.m.).

Avoiding tanning beds is also important, as they emit UV radiation that can damage skin cells. If you have already had BCC, your dermatologist may recommend more aggressive sun protection and more frequent skin checks. Some people with multiple BCCs or other risk factors may benefit from regular use of topical sunscreen or other preventive measures.

Frequently Asked Questions

Can basal cell carcinoma spread to other parts of my body?

BCC very rarely spreads to other organs or distant parts of the body. It grows slowly and locally, which is why it has such a good outlook. However, if left completely untreated for a long time, it can grow deeper into the skin and underlying tissue, potentially damaging nerves or blood vessels. This is why treatment, even for small lesions, is recommended.

Will I have a scar after BCC treatment?

Some scarring is common after surgical removal of BCC, but it often fades significantly over time. The appearance of the scar depends on the size and location of the cancer, the type of surgery, and how your skin heals. Your dermatologist can discuss scar management options and may recommend treatments like laser therapy or topical products to improve the appearance of a scar.

If I had basal cell carcinoma once, will I get it again?

People who have had BCC are at higher risk of developing another BCC, either in the same location (recurrence) or in a different area of the skin. However, most treated BCCs do not recur. Regular skin checks and sun protection can help catch any new cancers early, when they are easiest to treat.

How long does it take to recover from BCC treatment?

Recovery time varies depending on the treatment used. After surgical excision, the wound typically heals within two to four weeks, though complete healing and scar maturation can take several months. After other treatments like cryotherapy or topical creams, healing usually takes one to three weeks. Your dermatologist will give you specific recovery instructions based on your treatment.

Do I need to see a dermatologist regularly after BCC treatment?

Yes, regular follow-up visits are recommended. Your dermatologist will monitor the treated area and perform full-body skin checks to look for new cancers. The frequency of visits depends on your risk factors and history, but many dermatologists recommend annual checks for people with a history of BCC.