Basal cell carcinoma is the most common type of skin cancer, caused almost exclusively by cumulative sun exposure and UV damage. If you’re studying from the Milady Standard Esthetics textbook, this is one of the key skin conditions you need to recognize. Roughly 3.6 million cases are diagnosed in the United States each year, making it far more common than squamous cell carcinoma or melanoma.
Where Basal Cell Carcinoma Comes From
Basal cells sit in the lowest layer of the epidermis, the basal cell layer. Their job is to divide and produce new skin cells that gradually push upward to replace the squamous cells that shed from the skin’s surface. When UV radiation damages the DNA in these basal cells over time, they can begin to grow out of control, forming a carcinoma.
This is different from the other two major skin cancers. Squamous cell carcinoma originates from the flat cells in the upper, outer part of the epidermis. Melanoma develops from melanocytes, the pigment-producing cells. Of the three, melanoma is the least common but the most dangerous because it is more likely to spread to other parts of the body. Basal cell carcinoma, by contrast, grows slowly and has an extremely low metastasis rate, somewhere between 0.003% and 0.55% of cases. It can, however, be locally aggressive, meaning it destroys surrounding tissue if left untreated.
The Four Forms You Need to Know
For Milady exam purposes, basal cell carcinoma presents in four distinct forms:
- Nodular: The most common form. It appears as a pearl-like, shiny nodule that is somewhat translucent. On lighter skin it looks pearly white or pink. On darker skin tones it often appears brown or glossy black. Tiny visible blood vessels (telangiectasia) frequently run through or around the nodule. As it advances, the center may become depressed, and the lesion can bleed and crust over.
- Pigmented: Appears as a shiny, blue-black nodule or a brown, black, or blue lesion with dark spots and a slightly raised, translucent border.
- Superficial: Presents as a flat, scaly red patch, sometimes with a depressed center area. It can resemble a rash or patch of eczema, which makes it easy to overlook.
- Scarring (morpheaform): Resembles a white, waxy, scar-like lesion without a clearly defined border. It often has a depressed center and a crusty appearance.
A unifying feature across all four forms is that the growth does not heal on its own. A sore that repeatedly bleeds, scabs over, and then reopens is a classic warning sign.
Key Visual Markers to Remember
When identifying a potential basal cell carcinoma on a client, the features that should catch your attention are a pearly or translucent quality to the bump, visible tiny blood vessels on or around the lesion, a sore or growth that won’t heal, and any depressed or cratered center. These characteristics come up repeatedly on esthetics exams because they distinguish basal cell carcinoma from other skin conditions you might encounter during a facial or skin analysis.
Color presentation varies by skin tone. The “classic” pearly white bump is what most textbooks describe, but on brown and Black skin, the same lesion often looks glossy black or dark brown. Tiny blood vessels may also be harder to see on darker skin. Knowing this helps you spot suspicious lesions on every client, not just those with fair complexions.
How It’s Treated Medically
Treatment depends on the size, location, and subtype of the carcinoma. Small basal cell carcinomas on the chest, back, hands, or feet are often treated with surgical excision, where a doctor cuts out the lesion along with a margin of healthy skin and checks the edges under a microscope. Another option for small, low-risk growths is curettage and electrodesiccation: the surface of the cancer is scraped away, then the base is sealed with an electric needle.
For larger or higher-risk lesions, especially those on the face or those that extend deep into the skin, Mohs surgery is the standard. A surgeon removes the cancer one thin layer at a time, examining each layer under a microscope before going deeper. This approach preserves as much healthy tissue as possible, which matters a great deal in cosmetically sensitive areas. Radiation therapy is sometimes used when surgery isn’t an option.
Your Role as an Esthetician
Estheticians do not diagnose skin cancer. That is firmly outside the scope of practice. What you are trained to do, and what Milady emphasizes, is recognize suspicious features during a skin analysis and refer the client to a dermatologist. The key screening criteria mirror what dermatologists use: asymmetry in the lesion’s shape, irregular or jagged borders, color variation within the lesion, and a diameter larger than 6 millimeters. Both visual inspection and tactile examination (feeling for roughness, scaliness, or raised texture) are part of a thorough assessment.
If you notice something concerning, address it promptly and sensitively. Let the client know that early detection leads to the best treatment outcomes and that seeing a dermatologist is a smart next step. Avoid working directly on or around suspicious lesions, as this could irritate the area or interfere with future medical evaluation. Having a clear referral process already in place, ideally with a local dermatology practice you can recommend, makes these conversations easier for both you and your client.
Working on clients who have a known skin cancer diagnosis also requires caution. Certain treatments can exacerbate the condition or conflict with medical therapies the client is receiving. The priority is always client safety, which means deferring to the dermatologist’s guidance before proceeding with any esthetic services in those cases.