Basal Cell Carcinoma

Most basal cell carcinomas show up on sun-exposed skin, particularly the nose, cheeks, ears, scalp, neck, and the back of the hands. The classic appearance is a small pearly or pink bump with tiny visible blood vessels on the surface that bleeds with minor trauma and then scabs over and seems to heal, only to open up again weeks later. A sore that bleeds, scabs, and never fully heals is the most common patient complaint.

‍

BCC has several patterns. Nodular BCC is the pearly papule already described. Superficial BCC looks like a flat pink scaly patch and is often mistaken for eczema or psoriasis. Pigmented BCC contains brown or blue color and can resemble a mole or melanoma. Sclerosing or morpheaform BCC appears as a waxy, scar-like white patch with poorly defined borders, and these are the trickiest to recognize and to remove because they extend in finger-like roots well beyond what the eye can see.

Basal cell carcinoma is caused by cumulative ultraviolet exposure that damages DNA in basal keratinocytes. Most of that damage happens slowly, year after year, from everyday sun exposure rather than a single bad sunburn, although childhood sunburns and intense intermittent sun also raise risk. Tanning beds are a major preventable cause and are classified as a Group 1 human carcinogen.

‍

Risk goes up with fair skin, light eyes, blond or red hair, freckling, advancing age, outdoor work or hobbies, residence in sunny southern latitudes, immunosuppression after organ transplant, prior radiation therapy, and a personal or family history of skin cancer. Once you have one BCC, your odds of developing another within five years are roughly 40 to 50 percent, which is why ongoing surveillance matters as much as treatment.

Treatment is selected based on the BCC subtype, size, location, depth, and your overall health. Standard surgical excision with a margin of normal-appearing skin works well for low-risk lesions on the trunk and extremities, with cure rates around 95 percent. The tissue is sent for pathology to confirm clear margins.

‍

Mohs micrographic surgery is the gold standard for BCCs on the face, ears, scalp, hands, feet, and genitals, for large or recurrent tumors, and for aggressive subtypes such as morpheaform BCC. The Mohs surgeon removes the cancer in thin layers and examines the entire margin under the microscope on the same day, taking more tissue only where cancer remains. The result is the highest cure rate of any treatment, up to 99 percent for primary BCC, while sparing the maximum amount of healthy tissue.

‍

Other options for selected cases include curettage and electrodessication for small superficial lesions on the trunk, cryosurgery, photodynamic therapy, and topical imiquimod or 5-fluorouracil for superficial BCC. Radiation therapy is reserved for patients who cannot tolerate surgery. For advanced or metastatic BCC that cannot be removed surgically, oral hedgehog pathway inhibitors such as vismodegib or sonidegib offer another option.

Your visit starts with a thorough exam of the lesion and the rest of your skin, often using a dermatoscope. If we suspect skin cancer we perform a small shave or punch biopsy under local anesthesia, which takes only a few minutes. Pathology results usually come back in five to seven business days.

‍

If the biopsy confirms BCC, we discuss the recommended treatment in plain language, including what the scar is likely to look like and what the healing timeline involves. Most surgical treatments are done in the office under local anesthesia. Sutures usually come out in five to fourteen days depending on location, and final scar maturation takes six to twelve months.

‍

After treatment we recommend full-body skin exams every six to twelve months for life, because anyone with a history of BCC is at higher risk for new skin cancers.

See a dermatologist for any new spot that bleeds, scabs, and refuses to heal, any sore that comes back in the same place, a pearly or shiny bump that grows over months, or a flat pink scaly patch that does not respond to moisturizer or topical steroid. Pay particular attention to the nose, ears, lips, and scalp, which are common sites that are easy to miss.

‍

If you have fair skin, significant lifetime sun exposure, a personal or family history of skin cancer, or are immunosuppressed, schedule a baseline full-body skin exam even without a specific concern.

Daily broad-spectrum SPF 30 or higher sunscreen is the single most effective thing you can do, applied to the face, ears, neck, and hands every morning and reapplied every two hours of outdoor exposure. Pair sunscreen with wide-brimmed hats, UPF-rated clothing, and shade between 10 a.m. and 4 p.m. Avoid tanning beds completely.

‍

Examine your own skin once a month in good light, and ask a partner or family member to check your back and scalp. Photograph any spot you are watching so you can track changes objectively rather than relying on memory. Get a professional full-body skin exam at least once a year if you are at higher risk, and more often if you have already had a skin cancer.