Concerns About Growing Moles on the Sole: Is It Melanoma?

Moles that grow on the soles of the feet?

Hello Doctor: About 6-7 years ago, a mole suddenly appeared on the sole of my foot, which was originally not present.
It has a diameter of approximately 0.15 cm, is very round, and dark in color.
I didn't pay much attention to it until 2019, when it grew to about 0.25 cm in diameter.
Later, during the period from 2020 to 2021, it increased in size to approximately 0.3 x 0.45 cm.
The mole is now oval-shaped, and its edges are not as distinct as when it was smaller; the borders feel more blurred, and it is slightly raised.
I am a bit worried—could it possibly be melanoma?

Selena, 30~39 year old female. Ask Date: 2021/07/25

Dr. Wu Yuxin reply Dermatology

If you are concerned, why not seek a professional physician for an examination?

Reply Date: 2021/07/25

More Info

When it comes to concerns about moles or skin lesions, particularly those that change over time, it is essential to approach the situation with caution and a clear understanding of the potential implications. In your case, you have observed a mole on the sole of your foot that has increased in size and changed in shape over several years. These changes can indeed raise concerns about the possibility of melanoma, a type of skin cancer that arises from melanocytes, the cells responsible for producing pigment in the skin.

The characteristics of moles that may indicate a higher risk of melanoma can be summarized by the ABCDE rule:
1. Asymmetry: If you draw a line through the mole, and the two halves do not match, it may be a cause for concern.

2. Border: Moles with irregular, scalloped, or poorly defined edges are more suspicious than those with smooth, even borders.

3. Color: A variety of colors (brown, black, tan, red, white, or blue) within a single mole can be a warning sign.

4. Diameter: Moles larger than 6mm (about the size of a pencil eraser) are more likely to be problematic, although melanomas can be smaller.

5. Evolving: Any change in size, shape, color, or elevation, or any new symptom such as bleeding, itching, or crusting, is a reason to consult a healthcare professional.

In your description, the mole has grown from 0.15 cm to 0.3 cm and has changed from a round shape with well-defined edges to an oval shape with less distinct borders. These changes, particularly the increase in size and alteration in shape, warrant a thorough evaluation by a dermatologist. It is crucial to have a professional assessment, as they can perform a physical examination and may recommend a biopsy to determine whether the mole is benign or malignant.

Additionally, while it is understandable to feel anxious about the possibility of melanoma, it is important to remember that not all changes in moles indicate cancer. Many benign conditions can cause changes in moles, including hormonal changes, friction, or benign growths such as seborrheic keratosis or dermatofibromas. However, given the changes you have described, it is better to err on the side of caution.

In terms of your overall health, if you have any other symptoms such as unexplained weight loss, fatigue, or changes in your overall health, these should also be discussed with your healthcare provider. Regular skin checks, especially if you have a history of atypical moles or skin cancer in your family, are essential for early detection of any potential issues.

In conclusion, I strongly recommend that you schedule an appointment with a dermatologist as soon as possible. They will be able to provide a comprehensive evaluation of your mole and any other skin concerns you may have. Early detection is key in managing skin cancer effectively, and your proactive approach to monitoring changes in your skin is commendable. Remember, it’s always better to seek professional advice when it comes to changes in your health.

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