Disclaimer: This is to be used only as an educational piece. Individuals should not use it to self-diagnose a skin condition or problem.
Skin cancer is the most widely occurring type of cancer, and its rates continue to increase. Yet, for all its ubiquity, its two major varieties, melanoma and non-melanoma skin cancers, remain poorly understood by many.
This post cuts through the melanoma and non-melanoma “jargon” with clear, science-backed explanations and practical advice, empowering you to stay informed without feeling overwhelmed.
What Is Skin Cancer?
Skin cancer occurs when skin cells undergo DNA damage that causes them to grow uncontrollably. This damage is most often triggered by ultraviolet (UV) radiation from sunlight or tanning beds.
Our skin is made up of multiple layers and various types of cells, and the type of skin cancer depends on which cells turn cancerous.
Melanoma Skin Cancer
Photos of melanoma without magnification and with a tenfold magnification using a dermatoscope
Melanoma starts in melanocytes, the cells that produce melanin, the pigment responsible for our skin color. While melanoma accounts for a smaller percentage of skin cancer cases, it is far more dangerous because it grows quickly and can spread to other parts of the body (a process called metastasis).
One of the most effective ways to spot melanoma early is by using the ABCDE rule:
- Asymmetry: One half of the mole or spot doesn’t match the other half.
- Border: Edges are irregular, ragged, or blurred.
- Color: Uneven shades of black, brown, or even red and blue appear.
- Diameter: Larger than 6 millimeters (about the size of a pencil eraser).
- Evolving: Any change in size, shape, color, or symptoms like itching or bleeding.
On a molecular level, mutations in genes such as BRAF play a significant role in melanoma’s development. These mutations disrupt normal cell functions, leading to rapid, uncontrolled growth.
Non-Melanoma Skin Cancer
Non-melanoma skin cancers include basal cell carcinoma (BCC) and squamous cell carcinoma (SCC), which together make up about 95% of skin cancer cases. They originate from different cells in the epidermis, the outer layer of skin:
- Basal Cell Carcinoma (BCC): Arises from basal cells, which produce new skin cells as old ones die off. BCC is slow-growing and rarely spreads, but it can cause significant local damage if untreated. It often looks like pearly or waxy bumps, sometimes with visible blood vessels.
- Squamous Cell Carcinoma (SCC): Begins in squamous cells that make up most of the skin’s upper layers. SCC grows faster than BCC and can occasionally spread, especially if neglected. It may appear as red, scaly patches or open sores.
Both types tend to be less aggressive than melanoma but still require timely diagnosis and treatment to prevent complications.
Risk Factors for Both Types
Several risk factors increase the likelihood of developing melanoma or non-melanoma skin cancers:
- UV Radiation: Intense and prolonged exposure to sunlight or artificial UV sources is the primary driver of skin cancer. UV rays damage the DNA in skin cells, triggering mutations.
- Skin Type: People with lighter skin, freckles, and red or blonde hair have less melanin and are more vulnerable to UV damage.
- Age and Gender: Risk increases with age due to accumulated UV exposure; men tend to have higher rates of non-melanoma skin cancers.
- Genetics: Family history and inherited genetic mutations can predispose individuals to skin cancers.
- Immunosuppression: Weakened immune systems, whether from medical conditions or medications, lower the body’s ability to detect and destroy cancer cells.
- Previous Skin Injuries or Scars: Areas of skin that have been damaged or scarred may be more susceptible.
Diagnosis and Detection
Early detection saves lives. Diagnosing skin cancer starts with a professional skin exam and may include:
- Dermoscopy: A specialized magnifying tool to examine skin lesions more closely.
- Biopsy: Removing a small sample of suspicious tissue for microscopic examination confirms the diagnosis.
Self-monitoring is equally important. Regularly checking your skin for new or changing spots using mirrors or help from a partner can catch potential issues early.
Treatment Options
Treatment depends on the type, size, location, and stage of cancer, as well as overall health.
- Melanoma: Early-stage melanoma is usually treated with surgical excision, removing the tumor and some surrounding healthy tissue. For advanced melanoma, newer treatments like immunotherapy (which helps the immune system attack cancer cells) and targeted therapy (drugs that block specific mutated genes like BRAF) have revolutionized outcomes, improving survival rates significantly.
- Non-Melanoma Skin Cancers: Most are treated successfully with simple surgical removal. Other options include topical medications that destroy cancer cells, cryotherapy (freezing), and radiation therapy for harder-to-treat areas.
Each treatment plan is personalized, aiming to remove the cancer while preserving skin function and appearance as much as possible.
Prevention and Skin Care Tips
Preventing skin cancer means reducing UV damage and protecting your skin:
- Sunscreen: Use broad-spectrum sunscreen with SPF 30 or higher daily, even on cloudy days. Reapply as advised by your dermatologist or after swimming.
- Protective Clothing: Wear hats, sunglasses, and UV-blocking clothing when outdoors.
- Avoid Peak UV Hours: The sun’s rays are strongest between 10 a.m. and 4 p.m.; seek shade during these times.
- Regular Skin Checks: Familiarize yourself with your skin’s normal appearance and monitor for changes.
- Healthy Lifestyle: Eating antioxidant-rich foods and staying hydrated supports skin repair and resilience.
Preventive measures are your best defense against both melanoma and non-melanoma skin cancers.
When to See a Doctor
If you notice any new, unusual, or changing spots on your skin, or if an existing mole itches, bleeds, or doesn’t heal, it’s time to contact us today. Don’t wait for symptoms to worsen.
Conclusion
Melanoma and non-melanoma skin cancers differ in origin, behavior, and risk, but both require respect and vigilance. Understanding these differences helps you recognize warning signs, adopt preventive habits, and seek timely treatment.
Thanks to advances in medical science, even melanoma, once considered deadly, now has effective therapies that improve survival. Staying informed and proactive about skin health is your strongest ally in beating skin cancer.
DISCLAIMER; This is for general education purposes, don’t start any skin treatment without consulting with a certified dermatologist.
Dr Abdiaziz Mohamed