a Long-Lasting Green Spot on Your Foot: What to Know

I have had a greenish substance on the sole of my foot for over ten years?

Hello Doctor, I have a greenish spot on the sole of my left foot, approximately 0.5 cm in diameter.
It is not round but somewhat irregular in shape.
It feels slightly raised, similar to a callus, but not hard.
I am uncertain whether it is a mole or something that got stuck in my foot when I was younger.
It does not hurt or itch, so I have ignored it for at least ten years.
I am now 30 years old and remember having it during high school swimming classes or even earlier.
I recall trying to cut it out with scissors or nail clippers when I first discovered it, but that was unsuccessful.

With the rise of the internet, it has become easy to search for information, and in recent years, there has been a lot of talk about "melanoma," which has turned my indifference into constant worry.
I remember that when I first noticed this greenish spot, its outline was clearer, and it felt like something was embedded in my skin.
However, now the size and position seem the same, but the outline appears more blurred.
I am not sure if this is due to thickened skin.

Finally, I decided to visit a major hospital.
The doctor recommended a biopsy and noted that the greenish spot on my foot is not very large, suggesting that I might as well have it completely excised.
I signed the anesthesia and surgery consent forms because I was concerned that the pressure and friction from walking could worsen the condition.
Although I signed the necessary documents, I have to return for the surgery in a few days.

What worries me now is whether it is benign or malignant.
I did ask the doctor during my visit, and he seemed to think it is more likely benign since it has been on my foot for over a decade without any changes.
However, I still worry about the biopsy results being unfavorable.
What if I need to have an amputation? Just thinking about it makes me feel hopeless.
I understand that it is difficult for you to provide a judgment without seeing it in person, but I still want to ask for your opinion.
Additionally, if it turns out to be something bad, what should I do? (Of course, I will follow my treating physician's judgment and subsequent arrangements.) I believe this is a concern shared by many who have similar issues.

Dan Dan de You Shang, 30~39 year old female. Ask Date: 2018/06/26

Dr. Wu Yuxin reply Dermatology

So the surgery has already been scheduled? Let's wait for the surgery report to come out before discussing further.
Hypothetical questions cannot be answered.

Reply Date: 2018/06/26

More Info

When it comes to a long-lasting green spot on your foot, it’s understandable to feel anxious, especially given the prevalence of information regarding skin conditions and the potential for serious issues like melanoma. However, it’s crucial to approach this situation with a clear understanding of what you might be dealing with and the steps you can take moving forward.

Firstly, the characteristics of the spot you described—a greenish, irregularly shaped area that has been present for over a decade without pain or itching—are significant. The fact that it has not changed dramatically in size or shape over the years is a positive sign. Many skin lesions, such as benign moles or keratoses, can remain stable for long periods without causing any issues. The green color could be due to a variety of factors, including pigmentation changes, the presence of certain types of bacteria, or even a reaction to something in your environment or footwear.

Your decision to consult a physician and consider a biopsy is prudent. A biopsy will provide a definitive diagnosis, allowing for appropriate treatment if necessary. It’s important to remember that the majority of skin lesions are benign, especially those that have been stable for many years. The fact that your doctor believes there is a higher probability that it is benign is reassuring.
In terms of your concerns about the possibility of it being a malignant condition, such as melanoma, it’s important to note that melanoma typically presents with changes in size, shape, color, or elevation, and often becomes symptomatic (itching, bleeding, or crusting) as it progresses. Since your lesion has remained unchanged and asymptomatic, the likelihood of it being a malignant melanoma is lower, but the biopsy will provide clarity.

Regarding your worries about potential outcomes, it’s natural to feel apprehensive about the results. If the biopsy does reveal a malignant condition, the next steps would typically involve further evaluation and treatment options, which may include surgical excision, possibly additional therapies depending on the type and stage of the cancer. The key is early detection and intervention, which significantly improves outcomes in cases of skin cancer.

As for your concerns about amputation, this is generally a last resort and is reserved for advanced cases where the cancer has spread significantly. Most skin cancers, when caught early, can be treated effectively without such drastic measures.
In the meantime, it’s essential to take care of your foot and avoid any further irritation to the area. Keep the spot clean and covered if necessary, and avoid any attempts to self-treat or remove the lesion, as this can lead to infection or complications.

Lastly, while waiting for your appointment and the biopsy results, try to focus on self-care and stress management. Engaging in activities that you enjoy, practicing mindfulness, or talking to someone about your concerns can help alleviate some of the anxiety you may be feeling.

In summary, while it’s understandable to be concerned about a long-standing skin lesion, the likelihood of it being a serious issue is low, especially given its stability over time. The best course of action is to follow through with the biopsy, as it will provide the necessary information to address your concerns and determine the appropriate next steps. Remember, early intervention is key, and you are taking the right steps by seeking medical advice.

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