As clinicians who focus on skin cancer prevention, detection, and treatment, we believe that education plays an important role in supporting early diagnosis and healthier long term outcomes. In recognition of Melanoma Awareness Month, here are a few misconceptions about melanoma and the facts behind them.
Myth 1: Melanoma Always Starts With a Mole
Many people think melanoma begins in a pre existing mole, but research shows that a significant number of melanomas develop on areas of skin that did not previously have a visible mole. These are sometimes called de novo melanomas. Studies suggest that around 20 to 30 percent of melanomas are associated with an existing mole.
De novo melanomas are often found at a later stage because they may be harder to recognize early on. This is one reason why regular self checks and professional skin exams are important. You can learn more about what we look for during an exam on our skin screenings page.
Myth 2: Melanoma Only Occurs on the Skin
Although melanoma most commonly develops on the skin, it can also occur in other parts of the body where pigment producing cells are found. These areas can include the eyes, parts of the gastrointestinal tract, the genitourinary tract, and certain mucosal surfaces. Rarely, melanoma may also appear in the membranes surrounding the brain and spinal cord.
In some cases, the immune system may clear melanoma cells at the original site, which can make the primary tumour difficult to identify. This is known as regression.
Understanding Mole Changes
New moles and changes in existing spots can occur throughout life. It is recommended to speak with a medical professional if you notice a mole or spot that looks different from the rest, changes over time, or has features such as irregular borders, uneven colour, or increasing size. Early assessment helps determine whether the change is harmless or needs closer evaluation.
The Role of Prevention and Early Detection
Early detection greatly improves outcomes for melanoma. Protective habits, such as limiting midday sun, wearing UV protective clothing, using broad spectrum sunscreen, and avoiding tanning beds, all support skin health. For a general overview of sun safety basics, visit our Skin Cancer 101 post.
Why Full Body Skin Checks Still Matter
Even though many melanomas arise on normal appearing skin, checking your moles remains important because:
- Around 20 to 30 percent of melanomas do develop from existing moles
- Tracking your usual moles makes it easier to notice new spots
- New or changing lesions are often the ones that need the most attention
The key message is that both existing moles and new spots deserve awareness. Regular self checks combined with professional skin exams help support early diagnosis and timely care.
If you have questions about melanoma or want guidance on monitoring your skin, you can contact us for support.
Recognizing Concerning Skin Changes with Dr. Ben Wiese
Interested in Learning More About Melanoma Risk Factors?
You can explore common factors that influence melanoma risk in this short educational quiz.
