Non Melanoma Skin Cancer

Non-melanoma skin cancer is a broad group of skin cancers consisting most commonly of basal cell carcinoma and squamous cell carcinoma. In current sources, this group is also frequently referred to as keratinocyte cancer. Although it generally progresses more slowly than melanoma, it is not harmless; when neglected, deep tissue destruction, recurrence, and, in some cases, spread may occur. Early diagnosis, especially in cosmetically sensitive areas such as the face, reduces both tissue loss and treatment burden. ^[1][2][3][4]

Which types are included under non-melanoma skin cancer?

Basal cell carcinoma is the most common form and usually grows slowly. Squamous cell carcinoma, by contrast, may behave more aggressively in some patients and is monitored more closely, particularly in high-risk locations or in people with suppressed immunity. Beyond these two groups, rarer skin cancers also exist; however, in everyday clinical practice, the term “non-melanoma skin cancer” most often refers to these two main types. Actinic keratoses are not cancers, but they are regarded as precursor lesions and are particularly important in relation to squamous cell carcinoma. ^[1][2][3][4]

These cancers are seen most often in sun-exposed areas: the face, ears, lips, scalp, neck, backs of the hands, and forearms are among the leading sites. However, they do not occur only in people who work outdoors; cumulative ultraviolet exposure over a lifetime, fair skin, older age, immunosuppression, a prior history of skin cancer, and certain genetic susceptibilities may all increase risk. Tanning bed use is also not considered harmless. Even when risk is high, not every spot is cancer; still, suspicious areas should not be ignored for long periods. ^[1][2][3]

What are the symptoms?

Basal cell carcinoma often appears as a pearly, translucent-looking bump in which small blood vessels may sometimes be visible. It may occasionally ulcerate and crust like a sore, heal, and then reopen. Squamous cell carcinoma may appear as a crusted, thick, rough, reddish plaque, a nonhealing sore, or a bump that bleeds easily. At first glance, some lesions may be mistaken for eczema, a scar, or a “pimple that never goes away.” Failure of the lesion to improve over weeks, enlargement, or bleeding should be regarded as warning signs. ^[1][3][4]

In skin cancer, pain may be absent in the early stage; therefore, the absence of pain does not mean the lesion is safe. Lesions around the face, nose, ears, lips, and eyes are especially important because delayed diagnosis may require more extensive surgery. Squamous cell carcinomas arising on the lip, ear, or over an old scar are assessed particularly carefully. When a person says, “I have had the same sore for years,” this may sometimes contribute to delayed diagnosis; for this reason, persistence and change should be evaluated carefully. ^[1][4][5]

How are diagnosis and treatment planned?

Definitive diagnosis requires dermatologic evaluation and, in most cases, biopsy. Dermoscopic examination may be helpful, but biopsy determines the lesion type and certain risk features. Treatment selection varies according to the lesion’s location, size, borders, whether it is a first lesion or a recurrence, and its pathology characteristics. In critical areas such as the face or in lesions with poorly defined borders, more precise methods may be preferred. ^[1][3][4][5]

For early and localized lesions, surgical excision is often the main treatment. In selected suitable patients, curettage and electrodesiccation, cryotherapy, topical treatments, photodynamic therapy, radiotherapy, or other methods may also be considered. Mohs micrographic surgery is particularly prominent in selected cases because of its high cure rate and tissue-sparing advantage, especially in areas where margin control is important. However, not every patient needs Mohs surgery; the most appropriate method should be determined by a dermatology or relevant surgical team. ^[1][3][4][5]

Prevention and when to see a doctor

For prevention, it is important to avoid excessive sun exposure in a sensible way, seek shade, wear protective clothing, and use an appropriate sunscreen. Using a single cream does not reduce all risk to zero; behavior change is also necessary. Regular skin examinations are especially important in people who have already had skin cancer, because the risk of developing a new lesion may be increased. Becoming familiar with one’s own skin in the mirror makes it easier to seek early care when a new sore, growing bump, nonhealing crusted area, or easily bleeding spot is noticed. ^[2][3][4]

Any nonhealing sore, growing bump, recurrent crusting, bleeding, or rapidly changing lesion requires dermatologic evaluation. At an early stage, non-melanoma skin cancers can often be treated successfully; however, waiting a long time while self-treating with creams may delay diagnosis. Especially in people who are immunosuppressed, in lesions located on the lip or ear, or in those with a prior history of skin cancer, prompt specialist evaluation is the safest approach. ^[1][3][4]

Follow-up does not end when treatment is over. A person who has had one non-melanoma skin cancer may have a higher likelihood of developing a new lesion compared with the general population. For this reason, regular follow-up as advised by the physician, maintaining sun-protection habits, and routinely examining one’s own skin are important. In particular, after surgery in the head and neck region, wound healing, margin status, and signs of recurrence may be monitored closely. Instead of thinking, “it was removed and that is the end,” it is better to adopt a long-term skin-health perspective. ^[1][2][3][4]

Although fair skin, older age, and a history of intense sun damage increase risk, suspicious lesions can also occur in younger people. Therefore, the idea that “I am young, so it cannot happen to me” is not safe. ^[1][2]

During regular self-skin examinations, if a new bump, color change, an area that bleeds easily, or a nonhealing crust is noticed, evaluation should be sought without delay. ^[1][3]

Specialist assessment is required for an individualized diagnostic and treatment plan.

FAQ

Is non-melanoma skin cancer the same as melanoma?

No. Non-melanoma skin cancer usually refers to basal cell and squamous cell carcinomas, whereas melanoma is a different group of skin cancers. ^[1][2]

In which areas is it most commonly seen?

It is most often seen in sun-exposed areas such as the face, ears, lips, scalp, neck, and hands. ^[1][2]

Can a nonhealing sore be skin cancer?

Yes, it can. In particular, sores that do not improve over weeks, crust repeatedly, or bleed should be evaluated. ^[1][3][4]

Is surgery mandatory in treatment?

Not always; however, surgery is the main option for many patients. Depending on the site and type of lesion, other methods may also be used. ^[1][3][5]

When is Mohs surgery considered?

It may be considered particularly in selected cases involving areas such as the face, where tissue preservation is important, or where margin control is critical. ^[3][5]