Skin Cancer & Precancerous Conditions

Understanding Skin Cancer and Precancerous Skin Growths

The skin’s protective barrier is continuously exposed to environmental factors that can cause damage over time. When the damage alters the normal function of skin cells, a person can develop skin cancer and precancerous skin conditions. 

Ultraviolet (UV) radiation from sunlight is the leading cause of skin damage that can lead to skin cancer. UV rays penetrate the skin and damage the DNA within skin cells, creating genetic changes that may trigger abnormal cell growth. 

The risk increases with cumulative sun exposure over many years, as well as with intense, intermittent exposure that causes sunburns. Lifestyle factors such as outdoor work, frequent unprotected sun exposure, and indoor tanning further accelerate this damage. 

Genetic factors also influence risk. Individuals with fair skin, light hair or eye color, or skin that tends to freckle or burn easily have less natural protection against UV radiation. A family history of skin cancer, particularly melanoma, also raises risk.

Common Types of Skin Cancer

While there are several types of skin cancer, most cases fall into three primary categories.

Basal Cell Carcinoma (BCC)

Basal cell carcinoma is the most frequently diagnosed form of skin cancer. It develops from basal cells at the bottom of the epidermis and is most commonly associated with prolonged exposure to ultraviolet radiation. 

Warning Signs

BCC often begins as a new growth or a sore that does not heal. Common signs include: 

• A shiny or pearly bump that may be skin-colored or pink, sometimes with visible blood vessels
• A flat, firm, pale, or red patch that resembles a persistent scaly area
• A waxy, scar-like area with poorly defined borders
• A pimple-like lesion that bleeds, crusts, and returns in the same location

Screening and Monitoring

Although BCC is rarely life-threatening, early detection helps prevent extensive tissue damage. Regular skin exams are recommended after treatment, as recurrence is possible, and a prior diagnosis increases the future risk.

Squamous Cell Carcinoma (SCC)

Squamous cell carcinoma is the second most common type of skin cancer. It begins in squamous cells in the upper epidermis and often appears on chronically sun-exposed areas such as the face, scalp, ears, lips, and hands. 

However, it can also develop in areas of prior injury or scarring. 

SCC tends to grow faster than BCC and has a higher likelihood of spreading if untreated.

Warning Signs 

SCC commonly appears as a persistent, scaly red patch or a rough, thickened bump. It may appear as a firm, red nodule or a wart-like growth. A sore that heals and then returns in the same area is another common sign. 

Screening and Monitoring 

Most SCCs are highly treatable when caught early. Follow-up care is also crucial, as SCC carries a higher risk of recurrence. Skin exams may be recommended every three to six months initially, depending on individual risk.

Melanoma

Melanoma is the most serious form of skin cancer. It develops from melanocytes, the pigment-producing cells in the skin, and has a greater potential to spread if not detected early. 

Although less common than BCC or SCC, melanoma accounts for most skin cancer-related deaths.

Warning Signs 

Melanoma warning signs are often described using the ABCDE guidelines:

• A: Asymmetry
• B: Irregular borders
• C: Multiple or uneven colors
• D: Larger diameter
• E: Evolving size, shape, or color

Another important sign is to find the “ugly duckling” – a mole on your body that looks noticeably different from others.

Screening and Monitoring 

Professional skin exams are generally recommended yearly for adults, with more frequent visits for those at higher risk.

Patients with a history of melanoma require close follow-up, often every three to six months initially, then annually, to monitor for recurrence or new lesions.

Precancerous Conditions and Early Warning Signs

Some changes represent precancerous conditions – these are abnormal cells that may progress to skin cancer if left untreated. Recognizing these early warning signs allows for monitoring or treatment before malignancy develops.

Diagnosis and Screening

At Connolly Dermatology, we take a comprehensive approach to skin cancer screening and diagnosis. Our board-certified dermatologists perform thorough visual skin examinations during screening visits, carefully inspecting all areas of the skin. 

We often use dermoscopy to examine moles and lesions in greater detail. If a lesion appears suspicious, we perform an in-office biopsy to obtain a tissue sample for further analysis. 

Throughout this process, your comfort is our priority. We clearly explain our findings, answer your questions, and outline the next steps to ensure you understand both the process and the reasoning behind any recommendations.

Skin Cancer Treatment Options

Skin cancers and precancerous lesions can be treated using a range of established medical approaches. The most appropriate option depends on the type of lesion, where it is located, how large it is, and individual patient factors.

Surgical Removal

Surgical excision is commonly used for most skin cancers, including nearly all melanomas and many basal and squamous cell carcinomas. The procedure is typically performed under local anesthesia, and the lesion is removed along with a margin of surrounding skin.

Mohs surgery is a specialized technique used for certain basal and squamous cell carcinomas, particularly in high-risk or cosmetically sensitive areas. The cancer is removed in thin layers, each examined immediately under a microscope. This process continues until no cancer cells remain, allowing for precise removal with maximal tissue preservation.

Topical & Non-Surgical Treatments

Non-surgical treatment options are often used for precancerous lesions and select early-stage skin cancers. 

Superficial radiation therapy may be used to treat certain non-melanoma skin cancers with low-energy radiation that targets the lesion while limiting exposure to surrounding tissue. 

Photodynamic therapy offers another approach by applying a light-sensitive solution to abnormal cells, then activating it with a targeted light source to destroy precancerous and superficial cancer cells.

Follow-Up Care

Ongoing monitoring remains essential, even after a successful skin cancer treatment. Regular dermatology visits, monthly self-exams, and consistent sun protection help detect recurrence early and reduce future risk.

Prevention Tips and Skin Health Maintenance

While screening and early detection play a crucial role, prevention remains the most effective way to reduce the risk of skin cancer. 

These habits can lower the likelihood of developing both skin cancers and precancerous changes: 

• Apply a broad-spectrum sunscreen to exposed skin daily, even on cloudy days. 
• Limit direct sun exposure when UV intensity is highest, typically late morning through mid-afternoon. 
• Reduce direct sun exposure by wearing clothing that provides coverage, such as long-sleeved tops and wide-brimmed hats.
• Avoid indoor tanning and sunbathing. Tanning beds and intentional tanning expose the skin to concentrated UV radiation that increases cancer risk. 
• Check your skin from head to toe for new, changing, or non-healing spots regularly. 
• Stay hydrated to support overall skin function and maintain healthy skin barriers. 
• Eat a balanced diet rich in antioxidants to support skin repair and overall health.